Mountain Weather

Sgùrr Breac weather forecast.

999 m summit in Northwest Highlands. 8 forecast days covering wind, cloud, rain and temperature, updated 20 September 2026 at 16:08 UTC.

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Confidence: Medium
Overall hill weather22/100Poor
Wind25-40 mph westerly Gusts40-50 mph Feels like-6 to -2°C PrecipitationUp to around 2 mm Cloud-free summit estimate20% Cloud base through day500-1,100 m Freezing levelAbove summit DaylightSunrise 07:00 · Sunset 19:26 · 12.4 hours daylight

The day on the hill

Strong gusts and frequent summit cloud on Sgùrr Breac: summit wind broadly 25-40 mph, with gusts 40-50 mph at times (strong winds).

Wind & exposure

Gusts may knock you off balance on exposed ground, even between spells of lighter wind.

Cloud & views

Cloud base around 500–800 m in the morning, then around 800–1100 m around midday and 600–900 m by late afternoon. Summit cloud is likely, but brief clear spells remain possible if the cloud sits higher than expected.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Cloud may hang lower on western slopes and lift somewhat on the eastern side, but local terrain can differ. Any sunshine may be confined to lower ground or breaks away from the summit.

Rain & temperature

The ground is likely to be saturated after recent rain. Expect boggy paths and rapid runoff if more rain arrives.

Some rain is likely, totalling up to around 2 mm, but its timing and local amounts are uncertain. Cold on exposed tops: air temperature broadly 2 to 6°C, feeling around -6 to -2°C in the wind.

Forecast models differ on summit wind strength: around 31-35 mph at walker height, with gusts 44-49 mph.

Forecast confidence

Cloud height remains uncertain, especially where it is close to summit level. Keep windproof and warm layers readily available.

Cloud-height uncertainty could put the summit in or out of cloud, even where forecasts agree on the wider cloud cover.

Cloud-free timing: Around 5% early, improving to around 20% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 0.8 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Cloud may obscure this summit even while the surrounding model grid indicates sunshine. The low cloud-free summit estimate is a reason to be cautious about expecting views.

Early
0 h
Midday
0.8 h
Later
0 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Poor Summit winds around 25-35 mph. Gusts around 40-50 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind. Rain is forecast during this period.
16/100
Afternoon · 12:00–17:00 Poor Summit winds around 25-35 mph. Gusts around 40-50 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges.
28/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaGusts near 40 mph make meaningful shelter important. 59/100Mixed · 600 m View detailsHide details
Night beginning Sunday 20 September 2026

Full overnight outlook

Open-hillside camping looks mixed overall around 600 m (59/100). A lower pitch near 300 m looks more comfortable. Conditions are less suitable by 900 m. Open-ground gusts may reach about 40 mph. Seek meaningful shelter. Peak gusts range from about 25 mph at 300 m to 40 mph at 900 m. Around 1 mm is forecast, with rain liable to affect both pitching and packing up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 300, 600 and 900 m. Ventilation will matter. The coldest temperature falls from about 6.3°C at 300 m to 4.6°C at 900 m.

Overnight rain1.0 mm Open ground · 600 m17 mph · gusts 33 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 4°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
70%
Moonrise
18:00 BST
Moonset
23:40 BST

Extensive cloud may limit moonlight. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 20 Sep, 17:00 BST to 21 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m59/100 · mixed
Wind / gust
15 mph / 27 mph
Typical / low
6.7°C / 6.3°C · much of the night
In cloud
0% of modelled night
Condensation
High
600 m59/100 · mixed
Wind / gust
17 mph / 33 mph
Typical / low
6.7°C / 6.3°C · much of the night
In cloud
0% of modelled night
Condensation
High
900 m39/100 · poor
Wind / gust
20 mph / 39 mph
Typical / low
4.9°C / 4.6°C · much of the night
In cloud
100% of modelled night
Condensation
High

Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 4°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

The ground is likely to be very wet after recent rain. Expect boggy approaches and choose a durable pitch carefully.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 45 mph may affect balance on exposed rock. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 45 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust46 mphRain0.2 mm
Main factorsgusts around 45 mphwet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaCloud is likely to obscure much of the sky. View forecastClose forecast

After dark: aurora and stargazing

Night beginning 2026-09-20. All times are UK local time.

Stargazing

Poor sky conditions during the best available spell: 20 Sep, 21:40 BST to 22:00 BST.

Cloud is likely to obscure much of the sky.

Moon-free dark sky: 20 Sep, 23:30 BST to 21 Sep, 04:45 BST.

Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
TimeViewing conditions
20 Sep, 21:40 BST to 22:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

20 Sep, 22:00 BST to 23:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

20 Sep, 23:00 BST to 21 Sep, 00:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

21 Sep, 00:00 BST to 01:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

21 Sep, 01:00 BST to 02:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

21 Sep, 02:00 BST to 03:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

21 Sep, 03:00 BST to 04:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

21 Sep, 04:00 BST to 04:45 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing.

Moon, darkness and meteor showers

Gibbous moon, about 69% illuminated.

Moonrise around 20 Sep, 18:05 BST.

Moonset around 20 Sep, 23:30 BST.

Full darkness: 20 Sep, 21:40 BST to 21 Sep, 04:45 BST.

Moon times assume an open horizon. Hills can hide the Moon sooner. Moon-free does not mean cloud-free.

Southern Taurids are active on this night. Activity may be much lower away from the peak.

  • Draconids: peak around 9 October 2026.
  • Southern Taurids: peak around 10 October 2026.
  • Orionids: peak around 21 October 2026.
  • Northern Taurids: peak around 12 November 2026.
  • Leonids: peak around 18 November 2026.
  • Geminids: peak around 14 December 2026.
  • Ursids: peak around 22 December 2026.

Dates from the Royal Observatory Greenwich. Activity dates do not guarantee visible meteors. Look across a broad, dark sky, not only north.

Darkness of the surroundings

Estimated darkness rank 165 of 980 assessed peaks (1 is darkest), based on surrounding artificial light in 2021. This is not a measurement of tonight’s sky.

2021 artificial-light baseline, not measured sky brightness or a Bortle class. Changes to lighting, blue-rich LEDs, terrain screening, atmospheric scattering and cloud-reflected light are not resolved. Similar ranks are not meaningfully distinct. Darkness is not a recommendation to climb a summit at night.

VIIRS nighttime lights: Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. Reprocessed by OpenGeoHub/OpenLandMap. Cropped and ranked by Mountain Weather.

Sky-weather grades exclude light pollution, terrain and thin haze. They are not mountain safety ratings. Check the mountain and camping forecast separately. Accessible lower viewpoints may be a better choice than summits.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

Does the weather shape your plans?Optional hill-user research. One answer helps; further questions are up to you.Take part

Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Sunday 20 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

Open the questions to take part.

About the research and your privacy · Already been out? Share that experience instead

Confidence: Medium
Overall hill weather26/100Poor
Wind20-35 mph westerly Gusts40-50 mph Feels like2 to 6°C PrecipitationAround 2-5 mm Cloud-free summit estimate15% Cloud base through day600-900 m Freezing levelAbove summit DaylightSunrise 07:02 · Sunset 19:23 · 12.3 hours daylight

The day on the hill

Frequent summit cloud on Sgùrr Breac: summit wind broadly 20-35 mph, with gusts 40-50 mph at times (strong winds). Hill cloud may make navigation difficult, with very poor visibility in wetter spells.

Cloud & views

Cloud base mostly around 600–900 m through daylight. Summit cloud is likely, but brief clear spells remain possible if the cloud sits higher than expected.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Cloud may hang lower on western slopes and lift somewhat on the eastern side, but local terrain can differ. Very little direct sunshine is likely, with extensive cloud.

Drizzle is forecast for much of the day. The forecast total is around 2-5 mm, but local amounts will vary.

Forecast models differ on summit wind strength: around 21-38 mph at walker height, with gusts 29-54 mph.

Rain & temperature

The ground is likely to be wet after recent rain.

Forecast confidence

Cloud height remains uncertain, especially where it is close to summit level. Exposed tops may feel chilly in the wind.

A windproof layer will help, with an extra warm layer for stops. If clothing gets wet, you can cool more quickly.

Keep a dry warm layer protected. Buffeting may affect balance on exposed ground, particularly near ridges and edges.

Summit wind could be roughly 21-38 mph, which changes how difficult exposed walking may feel.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 0 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
0 h
Midday
0 h
Later
0 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Poor Summit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground. Rain is forecast during this period.
24/100
Afternoon · 12:00–17:00 Poor Summit winds around 20-30 mph. Gusts around 30-40 mph are possible on exposed ground. Rain is forecast during this period.
29/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaExposed camping is not recommended near 600 and 900 m: gusts may reach about 60 mph. Sustained winds may reach about 40 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. 9/100Poor · 600 m View detailsHide details
Night beginning Monday 21 September 2026

Full overnight outlook

Exposed camping is not recommended near 600 and 900 m: gusts may reach about 60 mph. Sustained winds may reach about 40 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. Open-hillside camping looks very poor overall around 600 m (9/100). Peak gusts range from about 40 mph at 300 m to 60 mph at 900 m. Around 4.9 mm is forecast, with rain liable to affect both pitching and packing up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 300, 600 and 900 m. Ventilation will matter. The coldest temperature falls from about 10.8°C at 300 m to 9°C at 900 m.

Overnight rain4.9 mm Open ground · 600 m29 mph · gusts 49 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 8°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
78%
Moonrise
18:15 BST
Moonset
01:06 next morning BST

Extensive cloud may limit moonlight. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 21 Sep, 17:00 BST to 22 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m39/100 · poor
Wind / gust
24 mph / 41 mph
Typical / low
11.5°C / 10.8°C
In cloud
0% of modelled night
Condensation
High
600 m9/100 · very poor
Wind / gust
29 mph / 49 mph
Typical / low
11.5°C / 10.8°C
In cloud
0% of modelled night
Condensation
High
900 m9/100 · very poor
Wind / gust
34 mph / 58 mph
Typical / low
9.6°C / 9.0°C · much of the night
In cloud
100% of modelled night
Condensation
High

Warmth planning: As a broad starting point, consider a 2-season bag with an ISO/EN comfort rating at or below about 8°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 45 mph may affect balance on exposed rock. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 45 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust43 mphRain1.9 mm
Main factorsgusts around 45 mphwet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaClearer spells are possible, but other forecasts keep much of the sky obscured by cloud. View forecastClose forecast

After dark: aurora and stargazing

Night beginning 2026-09-21. All times are UK local time.

Stargazing

Poor sky conditions during the best available spell: 22 Sep, 01:00 BST to 02:00 BST.

Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.

Moon-free dark sky: 22 Sep, 00:55 BST to 04:50 BST.

Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
TimeViewing conditions
21 Sep, 21:40 BST to 22:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

21 Sep, 22:00 BST to 23:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Reduced visibility may obscure faint objects.

21 Sep, 23:00 BST to 22 Sep, 00:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects.

22 Sep, 00:00 BST to 01:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

22 Sep, 01:00 BST to 02:00 BSTPoor sky conditions

Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.

Forecast models disagree.

22 Sep, 02:00 BST to 03:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Reduced visibility may obscure faint objects.

22 Sep, 03:00 BST to 04:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

22 Sep, 04:00 BST to 04:50 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Reduced visibility may obscure faint objects.

Moon, darkness and meteor showers

Gibbous moon, about 78% illuminated.

Moonrise around 21 Sep, 18:20 BST.

Moonset around 22 Sep, 00:55 BST.

Full darkness: 21 Sep, 21:40 BST to 22 Sep, 04:50 BST.

Moon times assume an open horizon. Hills can hide the Moon sooner. Moon-free does not mean cloud-free.

Southern Taurids are active on this night. Activity may be much lower away from the peak.

  • Draconids: peak around 9 October 2026.
  • Southern Taurids: peak around 10 October 2026.
  • Orionids: peak around 21 October 2026.
  • Northern Taurids: peak around 12 November 2026.
  • Leonids: peak around 18 November 2026.
  • Geminids: peak around 14 December 2026.
  • Ursids: peak around 22 December 2026.

Dates from the Royal Observatory Greenwich. Activity dates do not guarantee visible meteors. Look across a broad, dark sky, not only north.

Darkness of the surroundings

Estimated darkness rank 165 of 980 assessed peaks (1 is darkest), based on surrounding artificial light in 2021. This is not a measurement of tonight’s sky.

2021 artificial-light baseline, not measured sky brightness or a Bortle class. Changes to lighting, blue-rich LEDs, terrain screening, atmospheric scattering and cloud-reflected light are not resolved. Similar ranks are not meaningfully distinct. Darkness is not a recommendation to climb a summit at night.

VIIRS nighttime lights: Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. Reprocessed by OpenGeoHub/OpenLandMap. Cropped and ranked by Mountain Weather.

Sky-weather grades exclude light pollution, terrain and thin haze. They are not mountain safety ratings. Check the mountain and camping forecast separately. Accessible lower viewpoints may be a better choice than summits.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

Does the weather shape your plans?Optional hill-user research. One answer helps; further questions are up to you.Take part

Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Monday 21 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

Open the questions to take part.

About the research and your privacy · Already been out? Share that experience instead

Confidence: Medium
Overall hill weather28/100Poor
Wind15-40 mph westerly Gusts45-55 mph Feels like0 to 4°C PrecipitationAround 5-10 mm Cloud-free summit estimate45% Cloud base through day600-1,800 m Freezing levelAbove summit DaylightSunrise 07:04 · Sunset 19:20 · 12.3 hours daylight

The day on the hill

Strong gusts on Sgùrr Breac: summit wind broadly 15-40 mph, with gusts 45-55 mph at times (strong winds). Hill cloud may make navigation difficult, with very poor visibility in wetter spells.

Wind & exposure

Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Gusts may knock you off balance on exposed ground, even between spells of lighter wind.

Cloud & views

Cloud base around 600–900 m in the morning, lifting to 800–1100 m around midday and 1500–1800 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Cloud may hang lower on western slopes and lift somewhat on the eastern side, but local terrain can differ. Sunny spells are possible away from summit cloud, but may not reach the top while it is in cloud.

Rain & temperature

The ground is likely to be wet after recent rain. Some rain is likely, totalling around 5-10 mm, but its timing and local amounts are uncertain.

Cold on exposed tops: air temperature broadly 4 to 8°C, feeling around 0 to 4°C in the wind. Forecast models differ on summit wind strength: around 28-43 mph at walker height, with gusts 39-60 mph.

Forecast confidence

Cloud height remains uncertain, especially where it is close to summit level. A windproof layer will help, with an extra warm layer for stops.

If clothing gets wet, you can cool more quickly. Keep a dry warm layer protected.

Rain timing may shift by several hours, which could change how much of the main walking period stays dry.

Cloud-free timing: Around 10% early, improving to around 85% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 5.2 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Cloud may obscure this summit even while the surrounding model grid indicates sunshine. The low cloud-free summit estimate is a reason to be cautious about expecting views.

Early
0 h
Midday
2.1 h
Later
2.1 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Poor Summit winds around 25-35 mph early in the morning, easing to 15-25 mph later. Gusts around 45-55 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind. Rain is forecast during this period.
2/100
Afternoon · 12:00–17:00 Mixed Rain eases compared with the morning. Summit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground. Summit cloud is more persistent early in this period, with better prospects later. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
54/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaA broadly promising night on a well-chosen pitch. 87/100Excellent · 600 m View detailsHide details
Night beginning Tuesday 22 September 2026

Full overnight outlook

Open-hillside camping looks promising overall around 600 m (87/100). It may be breezy on open ground, with gusts near 25 mph. Peak gusts range from about 15 mph at 300 m to 25 mph at 900 m. Little overnight rain is forecast. The coldest temperature falls from about 6.6°C at 300 m to 4.9°C at 900 m.

Overnight rain0.0 mm Open ground · 600 m11 mph · gusts 20 mph Morning pack-upNo wet signal Sleeping-bag warmthISO comfort rating about 4°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
86%
Moonrise
18:24 BST
Moonset
02:33 next morning BST

Extensive cloud may limit moonlight. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 22 Sep, 17:00 BST to 23 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m89/100 · very good
Wind / gust
9 mph / 17 mph
Typical / low
7.0°C / 6.6°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m87/100 · promising
Wind / gust
11 mph / 20 mph
Typical / low
7.0°C / 6.6°C · much of the night
In cloud
0% of modelled night
Condensation
Low
900 m84/100 · promising
Wind / gust
13 mph / 23 mph
Typical / low
5.3°C / 4.9°C · a brief spell
In cloud
20% of modelled night
Condensation
Low

Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 4°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 50 mph may affect balance on exposed rock. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 50 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust51 mphRain5.2 mm
Main factorsgusts around 50 mphwet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaCloud is likely to obscure much of the sky. Moonlight washes out fainter stars. View forecastClose forecast

After dark: aurora and stargazing

Night beginning 2026-09-22. All times are UK local time.

Stargazing

Poor sky conditions during the best available spell: 22 Sep, 21:35 BST to 22:00 BST.

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

Moon-free dark sky: 23 Sep, 02:25 BST to 04:50 BST.

Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
TimeViewing conditions
22 Sep, 21:35 BST to 22:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

22 Sep, 22:00 BST to 23:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

22 Sep, 23:00 BST to 23 Sep, 00:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

23 Sep, 00:00 BST to 01:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

23 Sep, 01:00 BST to 02:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

23 Sep, 02:00 BST to 03:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

23 Sep, 03:00 BST to 04:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

23 Sep, 04:00 BST to 04:50 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

Moon, darkness and meteor showers

Gibbous moon, about 85% illuminated.

Moonrise around 22 Sep, 18:25 BST.

Moonset around 23 Sep, 02:25 BST.

Full darkness: 22 Sep, 21:35 BST to 23 Sep, 04:50 BST.

Moon times assume an open horizon. Hills can hide the Moon sooner. Moon-free does not mean cloud-free.

Southern Taurids are active on this night. Activity may be much lower away from the peak.

  • Draconids: peak around 9 October 2026.
  • Southern Taurids: peak around 10 October 2026.
  • Orionids: peak around 21 October 2026.
  • Northern Taurids: peak around 12 November 2026.
  • Leonids: peak around 18 November 2026.
  • Geminids: peak around 14 December 2026.
  • Ursids: peak around 22 December 2026.

Dates from the Royal Observatory Greenwich. Activity dates do not guarantee visible meteors. Look across a broad, dark sky, not only north.

Darkness of the surroundings

Estimated darkness rank 165 of 980 assessed peaks (1 is darkest), based on surrounding artificial light in 2021. This is not a measurement of tonight’s sky.

2021 artificial-light baseline, not measured sky brightness or a Bortle class. Changes to lighting, blue-rich LEDs, terrain screening, atmospheric scattering and cloud-reflected light are not resolved. Similar ranks are not meaningfully distinct. Darkness is not a recommendation to climb a summit at night.

VIIRS nighttime lights: Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. Reprocessed by OpenGeoHub/OpenLandMap. Cropped and ranked by Mountain Weather.

Sky-weather grades exclude light pollution, terrain and thin haze. They are not mountain safety ratings. Check the mountain and camping forecast separately. Accessible lower viewpoints may be a better choice than summits.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

Does the weather shape your plans?Optional hill-user research. One answer helps; further questions are up to you.Take part

Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Tuesday 22 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

Open the questions to take part.

About the research and your privacy · Already been out? Share that experience instead

Confidence: Medium
Overall hill weather68/100Mixed
Wind5-20 mph westerly Gusts20-30 mph Feels like-2 to 2°C PrecipitationUp to around 2 mm Cloud-free summit estimate50% Cloud base through day600-3,300 m Freezing levelAbove summit DaylightSunrise 07:06 · Sunset 19:17 · 12.2 hours daylight

The day on the hill

On Sgùrr Breac: summit wind broadly 5-20 mph, with gusts 20-30 mph at times (a moderate breeze).

Cloud & views

Cloud base around 3000–3300 m in the morning, then around 600–900 m around midday and 1000–1300 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Sunny spells are possible away from summit cloud, but may not reach the top while it is in cloud. Drizzle is forecast at times.

The forecast total is up to around 2 mm, but local amounts will vary. Cold on exposed tops: air temperature broadly 2 to 6°C, feeling around -2 to 2°C in the wind.

Forecast confidence

Cloud height remains uncertain, especially where it is close to summit level. Keep windproof and warm layers readily available.

Cloud-height uncertainty could put the summit in or out of cloud, even where forecasts agree on the wider cloud cover.

Cloud-free timing: Cloudier around midday at about 15%, compared with around 95% early and 80% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 7 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
0 h
Midday
3 h
Later
3 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Good Summit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground. Summit cloud becomes more persistent later. Rain is forecast during this period.
74/100
Afternoon · 12:00–17:00 Mixed Summit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground. Summit cloud is more persistent early in this period, with better prospects later. Rain is forecast during this period.
63/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaGusts near 35 mph make meaningful shelter important. 59/100Mixed · 600 m View detailsHide details
Night beginning Wednesday 23 September 2026

Full overnight outlook

Open-hillside camping looks mixed overall around 600 m (59/100). A lower pitch near 300 m looks more comfortable. Conditions are less suitable by 900 m. Open-ground gusts may reach about 35 mph. Seek meaningful shelter. Peak gusts range from about 25 mph at 300 m to 35 mph at 900 m. Wind direction may change substantially during the night. Shelter that works at dusk may be less effective later. Little overnight rain is forecast. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. The coldest temperature falls from about 5.7°C at 300 m to 3.1°C at 900 m.

Overnight rain0.0 mm Open ground · 600 m12 mph · gusts 31 mph Morning pack-upNo wet signal Sleeping-bag warmthISO comfort rating about 2°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
92%
Moonrise
18:30 BST
Moonset
03:59 next morning BST

Views of the Moon may come and go through cloud breaks. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 23 Sep, 17:00 BST to 24 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m76/100 · promising
Wind / gust
10 mph / 25 mph
Typical / low
5.9°C / 5.7°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m59/100 · mixed
Wind / gust
12 mph / 31 mph
Typical / low
5.9°C / 5.7°C · much of the night
In cloud
0% of modelled night
Condensation
Low
900 m39/100 · poor
Wind / gust
14 mph / 36 mph
Typical / low
4.5°C / 3.1°C · much of the night
In cloud
27% of modelled night
Condensation
Low

Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 2°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Poor40/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look mixed (40/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust24 mphRain0.9 mm
Main factorswet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaCloud breaks may offer some views of the stars. Moonlight washes out fainter stars. View forecastClose forecast

After dark: aurora and stargazing

Night beginning 2026-09-23. All times are UK local time.

Stargazing

Mixed sky conditions during the best available spell: 23 Sep, 21:30 BST to 22:00 BST.

Cloud breaks may offer some views of the stars. Moonlight washes out fainter stars.

Moon-free dark sky: 24 Sep, 03:50 BST to 04:55 BST.

Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
TimeViewing conditions
23 Sep, 21:30 BST to 22:00 BSTMixed sky conditions

Cloud breaks may offer some views of the stars. Moonlight washes out fainter stars.

23 Sep, 22:00 BST to 23:00 BSTMixed sky conditions

Cloud breaks may offer some views of the stars. Moonlight washes out fainter stars.

23 Sep, 23:00 BST to 24 Sep, 00:00 BSTMixed sky conditions

Cloud breaks may offer some views of the stars. Moonlight washes out fainter stars.

24 Sep, 00:00 BST to 01:00 BSTMixed sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

24 Sep, 01:00 BST to 02:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

24 Sep, 02:00 BST to 03:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

24 Sep, 03:00 BST to 04:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky.

24 Sep, 04:00 BST to 04:55 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Reduced visibility may obscure faint objects.

Moon, darkness and meteor showers

Gibbous moon, about 92% illuminated.

Moonrise around 23 Sep, 18:30 BST.

Moonset around 24 Sep, 03:50 BST.

Full darkness: 23 Sep, 21:30 BST to 24 Sep, 04:55 BST.

Moon times assume an open horizon. Hills can hide the Moon sooner. Moon-free does not mean cloud-free.

Southern Taurids are active on this night. Activity may be much lower away from the peak.

  • Draconids: peak around 9 October 2026.
  • Southern Taurids: peak around 10 October 2026.
  • Orionids: peak around 21 October 2026.
  • Northern Taurids: peak around 12 November 2026.
  • Leonids: peak around 18 November 2026.
  • Geminids: peak around 14 December 2026.
  • Ursids: peak around 22 December 2026.

Dates from the Royal Observatory Greenwich. Activity dates do not guarantee visible meteors. Look across a broad, dark sky, not only north.

Darkness of the surroundings

Estimated darkness rank 165 of 980 assessed peaks (1 is darkest), based on surrounding artificial light in 2021. This is not a measurement of tonight’s sky.

2021 artificial-light baseline, not measured sky brightness or a Bortle class. Changes to lighting, blue-rich LEDs, terrain screening, atmospheric scattering and cloud-reflected light are not resolved. Similar ranks are not meaningfully distinct. Darkness is not a recommendation to climb a summit at night.

VIIRS nighttime lights: Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. Reprocessed by OpenGeoHub/OpenLandMap. Cropped and ranked by Mountain Weather.

Sky-weather grades exclude light pollution, terrain and thin haze. They are not mountain safety ratings. Check the mountain and camping forecast separately. Accessible lower viewpoints may be a better choice than summits.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

Does the weather shape your plans?Optional hill-user research. One answer helps; further questions are up to you.Take part

Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Wednesday 23 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

Open the questions to take part.

About the research and your privacy · Already been out? Share that experience instead

Confidence: Low
Overall hill weather6/100Poor
Wind40-60 mph southwesterly Gusts70-80 mph Feels like-4 to 0°C PrecipitationAround 5-10 mm Cloud-free summit estimate70% Cloud base through day900-3,300 m Freezing levelAbove summit DaylightSunrise 07:08 · Sunset 19:15 · 12.1 hours daylight

The day on the hill

Strong gusts on Sgùrr Breac: summit wind broadly 40-60 mph, with gusts 70-80 mph at times (gale-force mean winds at times).

Wind & exposure

Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Summit wind strength is uncertain: around 33-74 mph at walker height, with gusts 47-103 mph.

Check again nearer the time.

Cloud & views

Cloud base around 1500–1800 m in the morning, then around 3000–3300 m around midday and 900–1200 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from early morning into around midday.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Cloud may hang lower on southwestern slopes and lift somewhat on the northeastern side, but local terrain can differ. Very little direct sunshine is likely, with extensive cloud.

Rain & temperature

Rain and drizzle are forecast for much of the day. The forecast total is around 5-10 mm, but local amounts will vary.

Cold on exposed tops: air temperature broadly 4 to 8°C, feeling around -4 to 0°C in the wind.

Forecast confidence

Cloud height remains uncertain, especially where it is close to summit level. Keep windproof and warm layers readily available.

If clothing gets wet, you can cool more quickly. Keep a dry warm layer protected.

The strongest gusts could knock you over on exposed ground. Avoid exposed ridges and edges.

Summit wind could be roughly 33-74 mph, which changes how difficult exposed walking may feel.

Cloud-free timing: Around 95% early, falling to around 30% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 0 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
0 h
Midday
0 h
Later
0 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Poor Summit winds around 20-30 mph early in the morning, strengthening to 30-40 mph later. Gusts around 50-60 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind. Rain is possible during the morning, but forecast models disagree on whether it will fall.
32/100
Afternoon · 12:00–17:00 Severe hill conditions Winds strengthen compared with the morning. Summit winds around 40-55 mph. Gusts around 70-80 mph are possible on exposed ground. The strongest gusts could knock you over on exposed ground. Avoid exposed ridges and edges. Summit cloud becomes more persistent later. Rain is forecast during this period. Rain is forecast during the afternoon, but models differ considerably on the amount.
0/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaExposed camping is not recommended near 300, 600 and 900 m: gusts may reach about 80 mph. Sustained winds may reach about 55 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. 0/100Poor · 600 m View detailsHide details
Night beginning Thursday 24 September 2026

Full overnight outlook

Exposed camping is not recommended near 300, 600 and 900 m: gusts may reach about 80 mph. Sustained winds may reach about 55 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. Open-hillside camping looks very poor overall around 600 m (0/100). Peak gusts range from about 55 mph at 300 m to 80 mph at 900 m. Roughly 12.2 mm is forecast overnight, including rain around pitching time. Pitches near 600 and 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 600 and 900 m. Ventilation will matter. The coldest temperature falls from about 8°C at 300 m to 4.6°C at 900 m.

Overnight rain12.2 mm Open ground · 600 m40 mph · gusts 66 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 4°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
97%
Moonrise
18:34 BST
Moonset
05:26 next morning BST

Cloud at the reference camping height may hide the Moon. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 24 Sep, 17:00 BST to 25 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m9/100 · very poor
Wind / gust
33 mph / 55 mph
Typical / low
9.8°C / 8.0°C · several hours
In cloud
0% of modelled night
Condensation
Moderate
600 m0/100 · very poor
Wind / gust
40 mph / 66 mph
Typical / low
9.0°C / 7.2°C · several hours
In cloud
33% of modelled night
Condensation
High
900 m0/100 · very poor
Wind / gust
47 mph / 78 mph
Typical / low
7.0°C / 4.6°C · several hours
In cloud
60% of modelled night
Condensation
High

Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 4°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 75 mph may affect balance on exposed rock. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 75 mph. Crosswinds can make exposed ridges substantially more serious.

Rock surfaceWet rock likelyPeak gust75 mphRain4.2 mm
Main factorsgusts around 75 mphwet rock likely
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaCloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars. View forecastClose forecast

After dark: aurora and stargazing

Night beginning 2026-09-24. All times are UK local time.

Aurora outlook

Increased potential: activity may reach this horizon. Too early to forecast.

A broad activity outlook, not a forecast of a visible display. Cloud and activity can change before the night.

Stargazing

Poor sky conditions during the best available spell: 25 Sep, 01:00 BST to 02:00 BST.

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

A bright Moon remains above the horizon through full darkness, washing out fainter stars and meteors.

Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
TimeViewing conditions
24 Sep, 21:30 BST to 22:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

24 Sep, 22:00 BST to 23:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

24 Sep, 23:00 BST to 25 Sep, 00:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

25 Sep, 00:00 BST to 01:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

25 Sep, 01:00 BST to 02:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

25 Sep, 02:00 BST to 03:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

25 Sep, 03:00 BST to 04:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

25 Sep, 04:00 BST to 04:55 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Reduced visibility may obscure faint objects.

Moon, darkness and meteor showers

Near-full moon, about 96% illuminated.

Moonrise around 24 Sep, 18:35 BST.

Moonset around 25 Sep, 05:15 BST.

Full darkness: 24 Sep, 21:30 BST to 25 Sep, 04:55 BST.

Moon times assume an open horizon. Hills can hide the Moon sooner. Moon-free does not mean cloud-free.

Southern Taurids are active on this night. Activity may be much lower away from the peak.

  • Draconids: peak around 9 October 2026.
  • Southern Taurids: peak around 10 October 2026.
  • Orionids: peak around 21 October 2026.
  • Northern Taurids: peak around 12 November 2026.
  • Leonids: peak around 18 November 2026.
  • Geminids: peak around 14 December 2026.
  • Ursids: peak around 22 December 2026.

Dates from the Royal Observatory Greenwich. Activity dates do not guarantee visible meteors. Look across a broad, dark sky, not only north.

Darkness of the surroundings

Estimated darkness rank 165 of 980 assessed peaks (1 is darkest), based on surrounding artificial light in 2021. This is not a measurement of tonight’s sky.

2021 artificial-light baseline, not measured sky brightness or a Bortle class. Changes to lighting, blue-rich LEDs, terrain screening, atmospheric scattering and cloud-reflected light are not resolved. Similar ranks are not meaningfully distinct. Darkness is not a recommendation to climb a summit at night.

VIIRS nighttime lights: Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. Reprocessed by OpenGeoHub/OpenLandMap. Cropped and ranked by Mountain Weather.

Sky-weather grades exclude light pollution, terrain and thin haze. They are not mountain safety ratings. Check the mountain and camping forecast separately. Accessible lower viewpoints may be a better choice than summits.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

Does the weather shape your plans?Optional hill-user research. One answer helps; further questions are up to you.Take part

Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Thursday 24 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

Open the questions to take part.

About the research and your privacy · Already been out? Share that experience instead

Confidence: Medium
Overall hill weather30/100Poor
Wind30-45 mph southwesterly Gusts50-60 mph Feels like-4 to 0°C PrecipitationUp to around 2 mm Cloud-free summit estimate75% Cloud base through day900-2,000 m Freezing levelAbove summit DaylightSunrise 07:10 · Sunset 19:12 · 12.0 hours daylight

The day on the hill

Strong gusts on Sgùrr Breac: summit wind broadly 30-45 mph, with gusts 50-60 mph at times (strong winds).

Wind & exposure

Much calmer lower down - generally 15-25 mph in the valley, rising towards the tops. Gusts may knock you off balance on exposed ground, even between spells of lighter wind.

Cloud & views

Cloud base around 900–1200 m in the morning, then around 1700–2000 m around midday and 900–1200 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from the morning into the afternoon.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Cloud may hang lower on southwestern slopes and lift somewhat on the northeastern side, but local terrain can differ. Sunny spells are possible away from summit cloud, but may not reach the top while it is in cloud.

Drizzle is forecast at times. The forecast total is up to around 2 mm, but local amounts will vary.

Cold on exposed tops: air temperature broadly 2 to 6°C, feeling around -4 to 0°C in the wind. Forecast models differ on summit wind strength: around 30-44 mph at walker height, with gusts 41-61 mph.

Rain & temperature

The ground is likely to be wet after recent rain.

Forecast confidence

Cloud height remains uncertain, especially where it is close to summit level. Keep windproof and warm layers readily available.

Cloud-height uncertainty could put the summit in or out of cloud, even where forecasts agree on the wider cloud cover.

Cloud-free timing: Around 45% early, improving to around 70% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 10.1 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
1.1 h
Midday
4 h
Later
3 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Poor Summit winds around 25-40 mph. Gusts around 50-60 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind. Summit cloud is more persistent early in this period, with better prospects later.
22/100
Afternoon · 12:00–17:00 Poor Summit winds around 30-40 mph. Gusts around 45-55 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind.
39/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaExposed camping is not recommended near 600 and 900 m: gusts may reach about 50 mph. Sustained winds may reach about 35 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. 19/100Poor · 600 m View detailsHide details
Night beginning Friday 25 September 2026

Full overnight outlook

Exposed camping is not recommended near 600 and 900 m: gusts may reach about 50 mph. Sustained winds may reach about 35 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. Open-hillside camping looks very poor overall around 600 m (19/100). Peak gusts range from about 35 mph at 300 m to 50 mph at 900 m. Little overnight rain is forecast. Pitches near 600 and 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 600 and 900 m. Ventilation will matter. The coldest temperature falls from about 7.4°C at 300 m to 4.8°C at 900 m.

Overnight rain0.2 mm Open ground · 600 m28 mph · gusts 43 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 4°C or lower

Moon overnight

Near-full moon

Illuminated disc
99%
Moonrise
18:38 BST
Moonset
06:53 next morning BST

Cloud at the reference camping height may hide the Moon. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 25 Sep, 17:00 BST to 26 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m39/100 · poor
Wind / gust
24 mph / 36 mph
Typical / low
7.4°C / 7.4°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m19/100 · very poor
Wind / gust
28 mph / 43 mph
Typical / low
7.2°C / 7.0°C · much of the night
In cloud
80% of modelled night
Condensation
High
900 m9/100 · very poor
Wind / gust
33 mph / 50 mph
Typical / low
5.2°C / 4.8°C · several hours
In cloud
87% of modelled night
Condensation
High

Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 4°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 55 mph may affect balance on exposed rock. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 55 mph. Crosswinds can make exposed ridges substantially more serious.

Rock surfaceWet rock likelyPeak gust53 mphRain0.3 mm
Main factorsgusts around 55 mphwet rock likely
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaClearer spells are possible, but other forecasts keep much of the sky obscured by cloud. View forecastClose forecast

After dark: aurora and stargazing

Night beginning 2026-09-25. All times are UK local time.

Aurora outlook

Increased potential: activity may reach this horizon. Too early to forecast.

A broad activity outlook, not a forecast of a visible display. Cloud and activity can change before the night.

Stargazing

Poor sky conditions during the best available spell: 25 Sep, 21:25 BST to 22:00 BST.

Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.

A bright Moon remains above the horizon through full darkness, washing out fainter stars and meteors.

Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
TimeViewing conditions
25 Sep, 21:25 BST to 22:00 BSTPoor sky conditions

Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.

Forecast models disagree.

25 Sep, 22:00 BST to 23:00 BSTPoor sky conditions

Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.

Forecast models disagree.

25 Sep, 23:00 BST to 26 Sep, 00:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Moonlight washes out fainter stars.

26 Sep, 00:00 BST to 01:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

26 Sep, 01:00 BST to 02:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

26 Sep, 02:00 BST to 03:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Reduced visibility may obscure faint objects. Moonlight washes out fainter stars.

26 Sep, 03:00 BST to 04:00 BSTPoor sky conditions

Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.

Forecast models disagree.

26 Sep, 04:00 BST to 05:00 BSTPoor sky conditions

Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.

Forecast models disagree.

Moon, darkness and meteor showers

Near-full moon, about 99% illuminated.

Moonrise around 25 Sep, 18:40 BST.

Moonset around 26 Sep, 06:40 BST.

Full darkness: 25 Sep, 21:25 BST to 26 Sep, 05:00 BST.

Moon times assume an open horizon. Hills can hide the Moon sooner. Moon-free does not mean cloud-free.

Southern Taurids are active on this night. Activity may be much lower away from the peak.

  • Draconids: peak around 9 October 2026.
  • Southern Taurids: peak around 10 October 2026.
  • Orionids: peak around 21 October 2026.
  • Northern Taurids: peak around 12 November 2026.
  • Leonids: peak around 18 November 2026.
  • Geminids: peak around 14 December 2026.
  • Ursids: peak around 22 December 2026.

Dates from the Royal Observatory Greenwich. Activity dates do not guarantee visible meteors. Look across a broad, dark sky, not only north.

Darkness of the surroundings

Estimated darkness rank 165 of 980 assessed peaks (1 is darkest), based on surrounding artificial light in 2021. This is not a measurement of tonight’s sky.

2021 artificial-light baseline, not measured sky brightness or a Bortle class. Changes to lighting, blue-rich LEDs, terrain screening, atmospheric scattering and cloud-reflected light are not resolved. Similar ranks are not meaningfully distinct. Darkness is not a recommendation to climb a summit at night.

VIIRS nighttime lights: Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. Reprocessed by OpenGeoHub/OpenLandMap. Cropped and ranked by Mountain Weather.

Sky-weather grades exclude light pollution, terrain and thin haze. They are not mountain safety ratings. Check the mountain and camping forecast separately. Accessible lower viewpoints may be a better choice than summits.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

Does the weather shape your plans?Optional hill-user research. One answer helps; further questions are up to you.Take part

Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Friday 25 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

Open the questions to take part.

About the research and your privacy · Already been out? Share that experience instead

Confidence: Unavailable
Overall hill weather18/100Poor
Wind30-40 mph southwesterly Gusts45-55 mph Feels like-4 to 0°C PrecipitationUp to around 2 mm Cloud-free summit estimate20% Cloud base through day700-1,000 m Freezing levelAbove summit DaylightSunrise 07:12 · Sunset 19:09 · 11.9 hours daylight

The day on the hill

Strong gusts and frequent summit cloud on Sgùrr Breac: summit wind broadly 30-40 mph, with gusts 45-55 mph at times (strong winds).

Wind & exposure

Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Gusts may knock you off balance on exposed ground, even between spells of lighter wind.

Cloud & views

Cloud base mostly around 700–1000 m through daylight. Summit cloud is likely, but brief clear spells remain possible if the cloud sits higher than expected.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Cloud may hang lower on southwestern slopes and lift somewhat on the northeastern side, but local terrain can differ. Any sunshine may be confined to lower ground or breaks away from the summit.

Drizzle is forecast at times. The forecast total is up to around 2 mm, but local amounts will vary.

Cold on exposed tops: air temperature broadly 2 to 6°C, feeling around -4 to 0°C in the wind. Forecast models disagree markedly on summit wind strength.

Check again nearer the time.

Forecast confidence

Cloud height remains uncertain, especially where it is close to summit level. Keep windproof and warm layers readily available.

Overall confidence is unavailable: insufficient comparable wind, rain guidance.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 11 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Cloud may obscure this summit even while the surrounding model grid indicates sunshine. The low cloud-free summit estimate is a reason to be cautious about expecting views.

Early
2 h
Midday
4 h
Later
3 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Poor Summit winds around 25-35 mph. Gusts around 40-50 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind.
20/100
Afternoon · 12:00–17:00 Poor Summit winds around 25-35 mph. Gusts around 40-50 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind. Rain is forecast during this period.
16/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaExposed camping is not recommended near 300, 600 and 900 m: gusts may reach about 70 mph. Sustained winds may reach about 50 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. 9/100Poor · 600 m View detailsHide details
Night beginning Saturday 26 September 2026

Full overnight outlook

Exposed camping is not recommended near 300, 600 and 900 m: gusts may reach about 70 mph. Sustained winds may reach about 50 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. Open-hillside camping looks very poor overall around 600 m (9/100). Peak gusts range from about 50 mph at 300 m to 70 mph at 900 m. Roughly 10.2 mm is forecast overnight, with rain liable to affect both pitching and packing up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 900 m. Ventilation will matter. The coldest temperature falls from about 6.5°C at 300 m to 4.8°C at 900 m.

Overnight rain10.2 mm Open ground · 600 m35 mph · gusts 59 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 4°C or lower

Moon overnight

Near-full moon

Illuminated disc
100%
Moonrise
18:42 BST
Moonset
Outside this window

Extensive cloud may limit moonlight. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 26 Sep, 17:00 BST to 27 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m9/100 · very poor
Wind / gust
29 mph / 49 mph
Typical / low
9.1°C / 6.5°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m9/100 · very poor
Wind / gust
35 mph / 59 mph
Typical / low
8.4°C / 6.5°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
900 m0/100 · very poor
Wind / gust
41 mph / 70 mph
Typical / low
6.2°C / 4.8°C · a brief spell
In cloud
100% of modelled night
Condensation
High

Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 4°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 50 mph may affect balance on exposed rock. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 50 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust49 mphRain0.6 mm
Main factorsgusts around 50 mphwet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaCloud is likely to obscure much of the sky. Moonlight washes out fainter stars. View forecastClose forecast

After dark: aurora and stargazing

Night beginning 2026-09-26. All times are UK local time.

Aurora outlook

Increased potential: activity may reach this horizon. Too early to forecast.

A broad activity outlook, not a forecast of a visible display. Cloud and activity can change before the night.

Stargazing

Poor sky conditions during the best available spell: 26 Sep, 21:20 BST to 22:00 BST.

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

A bright Moon remains above the horizon through full darkness, washing out fainter stars and meteors.

Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
TimeViewing conditions
26 Sep, 21:20 BST to 22:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

Limited model coverage.

26 Sep, 22:00 BST to 23:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

Limited model coverage.

26 Sep, 23:00 BST to 27 Sep, 00:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

Limited model coverage.

27 Sep, 00:00 BST to 01:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.

Limited model coverage.

27 Sep, 01:00 BST to 02:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Moonlight washes out fainter stars.

Limited model coverage.

27 Sep, 02:00 BST to 03:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Moonlight washes out fainter stars.

Limited model coverage.

27 Sep, 03:00 BST to 04:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Moonlight washes out fainter stars.

Limited model coverage.

27 Sep, 04:00 BST to 05:00 BSTPoor sky conditions

Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Moonlight washes out fainter stars.

Limited model coverage.

Moon, darkness and meteor showers

Near-full moon, about 100% illuminated.

Moonrise around 26 Sep, 18:45 BST.

Full darkness: 26 Sep, 21:20 BST to 27 Sep, 05:00 BST.

Moon times assume an open horizon. Hills can hide the Moon sooner. Moon-free does not mean cloud-free.

Southern Taurids are active on this night. Activity may be much lower away from the peak.

  • Draconids: peak around 9 October 2026.
  • Southern Taurids: peak around 10 October 2026.
  • Orionids: peak around 21 October 2026.
  • Northern Taurids: peak around 12 November 2026.
  • Leonids: peak around 18 November 2026.
  • Geminids: peak around 14 December 2026.
  • Ursids: peak around 22 December 2026.

Dates from the Royal Observatory Greenwich. Activity dates do not guarantee visible meteors. Look across a broad, dark sky, not only north.

Darkness of the surroundings

Estimated darkness rank 165 of 980 assessed peaks (1 is darkest), based on surrounding artificial light in 2021. This is not a measurement of tonight’s sky.

2021 artificial-light baseline, not measured sky brightness or a Bortle class. Changes to lighting, blue-rich LEDs, terrain screening, atmospheric scattering and cloud-reflected light are not resolved. Similar ranks are not meaningfully distinct. Darkness is not a recommendation to climb a summit at night.

VIIRS nighttime lights: Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. Reprocessed by OpenGeoHub/OpenLandMap. Cropped and ranked by Mountain Weather.

Sky-weather grades exclude light pollution, terrain and thin haze. They are not mountain safety ratings. Check the mountain and camping forecast separately. Accessible lower viewpoints may be a better choice than summits.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

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Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Saturday 26 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

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Confidence: Unavailable
Overall hill weather32/100Poor
Wind25-40 mph southwesterly Gusts40-50 mph Feels like-6 to -2°C PrecipitationAround 2-5 mm Cloud-free summit estimate60% Cloud base through day600-1,500 m Freezing levelAbove summit DaylightSunrise 07:14 · Sunset 19:06 · 11.9 hours daylight

The day on the hill

Strong gusts on Sgùrr Breac: summit wind broadly 25-40 mph, with gusts 40-50 mph at times (strong winds). Visibility may drop briefly in showers.

Wind & exposure

Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Gusts may knock you off balance on exposed ground, even between spells of lighter wind.

Cloud & views

Cloud base around 600–900 m in the morning, lifting to 1200–1500 m around midday. Summit cloud is extensive early, becoming less frequent later.

Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.

Cloud may hang lower on southwestern slopes and lift somewhat on the northeastern side, but local terrain can differ. Sunny spells are possible away from summit cloud, but may not reach the top while it is in cloud.

Drizzle is forecast for much of the day, with some passing showers too. The forecast total is around 2-5 mm, but local amounts will vary.

Cold on exposed tops: air temperature broadly 2 to 6°C, feeling around -6 to -2°C in the wind. Keep windproof and warm layers readily available.

If clothing gets wet, you can cool more quickly. Keep a dry warm layer protected.

Forecast confidence

Overall confidence is unavailable: insufficient comparable wind, rain guidance.

Cloud-free timing: Around 15% early, improving to around 85% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 11 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
2 h
Midday
4 h
Later
3 h

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00 Poor Summit winds around 25-35 mph. Gusts around 40-50 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind. Rain is forecast during this period.
15/100
Afternoon · 12:00–17:00 Mixed Summit winds around 20-30 mph. Gusts around 35-45 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Rain is forecast during this period.
50/100

Compare an early start with later conditions. The main forecast above covers the day in more detail.

Overnight · 17:00–08:00Wild campingBetaGusts near 40 mph make meaningful shelter important. 39/100Poor · 600 m View detailsHide details
Night beginning Sunday 27 September 2026

Full overnight outlook

Open-hillside camping looks poor overall around 600 m (39/100). A lower pitch near 300 m looks more comfortable. Conditions are less suitable by 900 m. Open-ground gusts may reach about 40 mph. Seek meaningful shelter. Peak gusts range from about 30 mph at 300 m to 40 mph at 900 m. A little rain may coincide with pitching or packing up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. The coldest temperature falls from about 5.4°C at 300 m to 2.6°C at 900 m.

Overnight rain0.9 mm Open ground · 600 m20 mph · gusts 35 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 2°C or lower

Moon overnight

Waning gibbous moon

Illuminated disc
98%
Moonrise
18:46 BST
Moonset
Outside this window

Views of the Moon may come and go through cloud breaks. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 27 Sep, 17:00 BST to 28 Sep, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Elevation reference (open ground)

300 m59/100 · mixed
Wind / gust
17 mph / 29 mph
Typical / low
5.8°C / 5.4°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m39/100 · poor
Wind / gust
20 mph / 35 mph
Typical / low
5.8°C / 5.4°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
900 m39/100 · poor
Wind / gust
24 mph / 41 mph
Typical / low
3.2°C / 2.6°C · much of the night
In cloud
33% of modelled night
Condensation
Moderate

Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 2°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

Open-hillside reference. A sheltered pitch may be calmer; cols and ridges may be much windier. Tent design and the exact pitch still matter. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback

Approximate height is enough, please do not share an exact wild-camp location.

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 45 mph may affect balance on exposed rock. Poor3/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (3/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose semipelite (Glenfinnan Group). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Representative samples along available mapped routes also include Felsic orthogneiss, Psammite, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 45 mph. Crosswinds can make exposed ridges substantially more serious.

Rock surfaceWet rock likelyPeak gust47 mphRain4.9 mm
Main factorsgusts around 45 mphwet rock likely
Mapped rock across the summit and available routes Gneissose semipelite Glenfinnan Group
Origin
Metamorphic
Rock family
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

These are mapped rock groups, not separate weather forecasts or a ranking of route safety.

Sgùrr Breac and A' Chailleach (Fannichs)

psammite, pelite or semipelite, granite, gneiss or gabbro

Geological detail and BGS records
Mapped variation

3 rock types appear across the available route samples

The summit type remains the forecast's cautious rock-response reference. Other mapped types show where conditions may behave differently elsewhere on the mountain.

Summit mapping Gneissose semipelite Glenfinnan Group 340–993 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record
Route sample Felsic orthogneiss Lewisianoid Gneiss Complex 530–620 m samples Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.

BGS record
Route sample Psammite Morar Group Around 432 m Seen on Sgùrr Breac and A' Chailleach (Fannichs)

Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.

BGS record

Generic exposed scrambling terrain; mapped summit-point bedrock is included where available, but route grade, exact rock, polish, drainage and escape options remain unresolved. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback

A broad surface report is enough; you do not need to identify a particular route.

Overnight · Aurora, stars & meteorsAfter darkBetaNight-sky guidance is unavailable for this night. View forecastClose forecast

After dark: aurora and stargazing

Night-sky guidance is unavailable for this night. This does not mean clear skies or no aurora.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

Does the weather shape your plans?Optional hill-user research. One answer helps; further questions are up to you.Take part

Help the Mountain Decisions Project understand how forecasts influence hill days, including when plans stay the same. Findings will be shared publicly as summaries, not individual responses.

This is about Sgùrr Breac on Sunday 27 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

Open the questions to take part.

About the research and your privacy · Already been out? Share that experience instead

Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.

Forecast run: 2026-09-20

Keep exploring

Weather around Sgùrr Breac.

Compare the summit forecast with the wider regional picture and nearby peaks before choosing a route.

Regional mountain forecastNorthwest HighlandsView area →
A' Chailleach (Fannichs)997 m · 2.2 km awayForecast →Sgùrr nan Clach Geala1,093 m · 2.6 km awayForecast →Sgùrr nan Each923 m · 2.9 km awayForecast →Meall a' Chrasgaidh934 m · 3.4 km awayForecast →

A forecast is part of the decision.

Mountain weather can differ sharply from conditions in the valley. Check official warnings, carry appropriate navigation and clothing, and be ready to change the plan. Read how Mountain Weather forecasts are produced and where their limits lie.

Choose another summit