Select a day to replace the detailed forecast below. 8 forecast days are available here.
Confidence: Medium
Overall hill weather36/100Poor
Wind25-40 mph westerlyGusts45-55 mphFeels like-4 to 0°CPrecipitationLittle or noneCloud-free summit estimate60%Cloud base through day500-1,300 mFreezing levelAbove summitDaylightSunrise 06:59 · Sunset 19:25 · 12.4 hours daylight
The day on the hill
Strong gusts on Sgòrr na Diollaid: summit wind broadly 25-40 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 around 500–800 m in the morning, lifting to 1000–1300 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 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 saturated after recent rain. Expect boggy paths and rapid runoff if more rain arrives.
Little or no rain is forecast. 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 34-39 mph at walker height, with gusts 47-54 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 20% early, improving to around 70% later.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 5 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.
Morning · 08:00–12:00
PoorSummit 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. Summit cloud is more persistent early in this period, with better prospects later.
19/100
Afternoon · 12:00–17:00
MixedWinds ease compared with the morning. Summit winds around 15-35 mph. Gusts around 40-50 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges.
54/100
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.39/100Poor · 600 mView detailsHide details
Night beginning Sunday 20 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 600 m. Open-ground gusts may reach about 35 mph. Seek meaningful shelter. Peak gusts range from about 30 mph at 300 m to 35 mph at 600 m. Little overnight rain is forecast. Some condensation is possible overnight.
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
14 mph / 29 mph
Typical / low
7.1°C / 6.4°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m39/100 · poor
Wind / gust
17 mph / 34 mph
Typical / low
7.1°C / 6.4°C · much of the night
In cloud
0% 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 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.
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Daytime · exposed rockClimbing & scramblingBetaRock may be damp or still drying. Gusts near 50 mph may affect balance on exposed rock.Poor8/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look very poor (8/100). Recent rain may leave seepage and damp rock, especially on shaded sections. The mapped summit rock is Gneissose pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Gusts may reach about 50 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceDry overhead; seepage uncertainPeak gust51 mphRain0.0 mm
Main factorsgusts around 50 mphdamp or incompletely dried rock possible
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Sunday 20 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind25-35 mph southwesterlyGusts40-50 mphFeels like6 to 10°CPrecipitationUp to around 2 mmCloud-free summit estimate30%Cloud base through day600-900 mFreezing levelAbove summitDaylightSunrise 07:01 · Sunset 19:22 · 12.3 hours daylight
The day on the hill
Frequent summit cloud on Sgòrr na Diollaid: summit wind broadly 25-35 mph, with gusts 40-50 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 10-20 mph in the valley, rising towards the tops.
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 southwestern slopes and lift somewhat on the northeastern 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 up to around 2 mm, but local amounts will vary.
Forecast models differ on summit wind strength: around 26-38 mph at walker height, with gusts 36-54 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. Buffeting may affect balance on exposed ground, particularly near ridges and edges.
Cloud-height uncertainty could put the summit in or out of cloud, even where forecasts agree on the wider cloud cover.
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.
Morning · 08:00–12:00
PoorSummit winds around 20-30 mph. Gusts around 30-40 mph are possible on exposed ground. Rain is forecast during this period.
24/100
Afternoon · 12:00–17:00
PoorWinds strengthen compared with the morning. 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. Rain is forecast during this period.
15/100
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 m: gusts may reach about 40 mph. Sustained winds may reach about 30 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out.19/100Poor · 600 mView detailsHide details
Night beginning Monday 21 September 2026
Full overnight outlook
Exposed camping is not recommended near 600 m: gusts may reach about 40 mph. Sustained winds may reach about 30 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 40 mph at 600 m. Little overnight rain is forecast. Condensation risk is high near 300 and 600 m, so a wet pack-up is possible. Ventilation will matter.
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
22 mph / 35 mph
Typical / low
11.7°C / 11.3°C
In cloud
0% of modelled night
Condensation
High
600 m19/100 · very poor
Wind / gust
26 mph / 42 mph
Typical / low
11.7°C / 11.3°C
In cloud
0% 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.
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Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 45 mph may affect balance on exposed rock.Poor0/100View 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 pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. 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 gust44 mphRain0.9 mm
Main factorsgusts around 45 mphwet rock likelymuch of the route may be in cloud
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Monday 21 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind15-40 mph westerlyGusts40-50 mphFeels like2 to 6°CPrecipitationUp to around 2 mmCloud-free summit estimate60%Cloud base through day600-2,000 mFreezing levelAbove summitDaylightSunrise 07:03 · Sunset 19:19 · 12.3 hours daylight
The day on the hill
Strong gusts on Sgòrr na Diollaid: summit wind broadly 15-40 mph, with gusts 40-50 mph at times (strong winds).
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 1700–2000 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from around midday 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.
Drizzle is forecast at times. The forecast total is up to around 2 mm, but local amounts will vary.
Forecast models differ on summit wind strength: around 26-39 mph at walker height, with gusts 36-54 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. Forecast models differ on whether meaningful rain reaches the hills during the afternoon and evening.
Cloud-free timing: Around 25% early, improving to around 95% later.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 1.3 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.
Morning · 08:00–12:00
PoorSummit 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. Rain is possible during the morning, but forecast models disagree on whether it will fall.
11/100
Afternoon · 12:00–17:00
GoodWinds ease compared with the morning. Summit winds around 10-25 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 forecast during this period. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
76/100
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaConditions look very good, but forecast uncertainty caps the grade at 88/100.88/100Excellent · 600 mView detailsHide details
Night beginning Tuesday 22 September 2026
Full overnight outlook
Open-hillside camping looks very good overall around 600 m (88/100). Light winds are expected on open ground, though local shelter and exposure still matter. Little overnight rain is forecast. Forecast models are not closely enough agreed for an exceptional grade. The grade is capped at 88/100.
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 m88/100 · very good
Wind / gust
6 mph / 13 mph
Typical / low
7.4°C / 6.6°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m88/100 · very good
Wind / gust
7 mph / 15 mph
Typical / low
7.4°C / 6.6°C · much of the night
In cloud
0% 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.
Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback →
Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 45 mph may affect balance on exposed rock.Poor0/100View 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 pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Gusts may reach about 45 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceWet rock likelyPeak gust46 mphRain0.8 mm
Main factorsgusts around 45 mphwet rock likely
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Tuesday 22 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind10-25 mph northwesterlyGusts20-30 mphFeels like-2 to 2°CPrecipitationUp to around 2 mmCloud-free summit estimate75%Cloud base through day1,000-1,300 mFreezing levelAbove summitDaylightSunrise 07:05 · Sunset 19:17 · 12.2 hours daylight
The day on the hill
Mostly dry with limited summit cloud on Sgòrr na Diollaid: summit wind broadly 10-25 mph, with gusts 20-30 mph at times (a moderate breeze). Cloud-height uncertainty could put the summit in or out of cloud.
Clear spells may be difficult to time. 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: Around 55% early, improving to around 95% later.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 5.6 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.
Morning · 08:00–12:00
GoodSummit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground. Rain is forecast during this period.
73/100
Afternoon · 12:00–17:00
GoodWinds strengthen compared with the morning. Summit winds around 10-20 mph. Gusts around 20-30 mph are possible on exposed ground.
76/100
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaLower pitches look more comfortable than exposed ground near 600 m.59/100Mixed · 600 mView 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 600 m. It may be breezy on open ground, with gusts near 25 mph. Little overnight rain is forecast.
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 m87/100 · promising
Wind / gust
10 mph / 21 mph
Typical / low
6.4°C / 6.0°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m59/100 · mixed
Wind / gust
11 mph / 24 mph
Typical / low
6.4°C / 6.0°C · much of the night
In cloud
0% 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.
Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback →
Daytime · exposed rockClimbing & scramblingBetaWet rock is likely.Poor45/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look mixed (45/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.
Rock surfaceWet rock likelyPeak gust26 mphRain0.3 mm
Main concernwet rock likely
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Wednesday 23 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind25-45 mph southwesterlyGusts55-65 mphFeels like-4 to 0°CPrecipitationUp to around 2 mmCloud-free summit estimate95%Freezing levelAbove summitDaylightSunrise 07:07 · Sunset 19:14 · 12.1 hours daylight
The day on the hill
Strong gusts on Sgòrr na Diollaid: summit wind broadly 25-45 mph, with gusts 55-65 mph at times (gale-force mean winds at times).
Wind & exposure
Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Summit wind strength is uncertain: around 28-65 mph at walker height, with gusts 39-91 mph.
Check again nearer the time.
Cloud & views
Cloud base around 1200–1500 m in the morning, lifting to 1300–1600 m around midday and 1600–1900 m by late afternoon. The summit is likely to stay mostly clear.
Cloud-height uncertainty could put the summit in or out of cloud. Clear spells may be difficult to time.
Very little direct sunshine is likely, with extensive cloud.
Rain & temperature
Little or no rain is forecast. Cold on exposed tops: air temperature broadly 2 to 6°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.
Walking into the wind is likely to be arduous, with buffeting that can knock you off balance. Rain timing may shift by several hours, which could change how much of the main walking period stays dry.
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.
Morning · 08:00–12:00
MixedSummit winds around 15-25 mph early in the morning, strengthening to 25-35 mph later. Gusts around 40-50 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges.
54/100
Afternoon · 12:00–17:00
PoorSummit winds around 20-30 mph in the early afternoon, strengthening to 30-40 mph later. Gusts around 50-60 mph are possible on exposed ground. Walking into the wind is likely to be arduous, with buffeting that can knock you off balance. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
32/100
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 and 600 m: gusts may reach about 55 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 mView detailsHide details
Night beginning Thursday 24 September 2026
Full overnight outlook
Exposed camping is not recommended near 300 and 600 m: gusts may reach about 55 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 45 mph at 300 m to 55 mph at 600 m. Around 3 mm is forecast, including rain around pitching time. Pitches near 600 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present.
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 m19/100 · very poor
Wind / gust
28 mph / 45 mph
Typical / low
9.9°C / 9.2°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m9/100 · very poor
Wind / gust
34 mph / 54 mph
Typical / low
9.6°C / 8.9°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 6°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.
Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback →
Daytime · exposed rockClimbing & scramblingBetaPatchy rain could leave exposed holds damp or slippery. Gusts near 55 mph may affect balance on exposed rock.Poor0/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look very poor (0/100). Likely to stay mostly dry, but patchy rain remains possible and could leave exposed rock damp or slippery. The mapped summit rock is Gneissose pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Gusts may reach about 55 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceDry initially; rain possiblePeak gust57 mphRainPossible · 82%
Main factorsgusts around 55 mphrain possible despite mostly dry conditions being favoured
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Thursday 24 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind10-30 mph southwesterlyGusts25-35 mphFeels like0 to 4°CPrecipitationLittle or noneCloud-free summit estimate55%Cloud base through day500-1,300 mFreezing levelAbove summitDaylightSunrise 07:09 · Sunset 19:11 · 12.0 hours daylight
The day on the hill
On Sgòrr na Diollaid: summit wind broadly 10-30 mph, with gusts 25-35 mph at times (a fresh breeze).
Wind & exposure
Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops.
Cloud & views
Cloud base around 700–1000 m in the morning, then around 1000–1300 m around midday and 500–800 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from midday into the afternoon.
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.
Rain & temperature
Little or no rain is forecast. Forecast models differ on summit wind strength: around 18-26 mph at walker height, with gusts 25-37 mph.
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. Rain timing may shift by several hours, which could change how much of the main walking period stays dry.
Cloud-free timing: Best around midday at about 75%, compared with around 45% early and 40% later.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 10.2 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.
Morning · 08:00–12:00
PoorSummit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground.
42/100
Afternoon · 12:00–17:00
GoodSummit winds around 10-20 mph. Gusts around 20-30 mph are possible on exposed ground. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
78/100
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaConditions look promising, but forecast uncertainty caps the grade at 82/100.82/100Good · 600 mView detailsHide details
Night beginning Friday 25 September 2026
Full overnight outlook
Open-hillside camping looks promising overall around 600 m (82/100). It may be breezy on open ground, with gusts near 20 mph. Little overnight rain is forecast. Pitches near 600 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Forecast models are not closely enough agreed for an exceptional grade. The grade is capped at 82/100.
Clear spells may allow a view of 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 m82/100 · promising
Wind / gust
11 mph / 18 mph
Typical / low
7.8°C / 7.3°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m82/100 · promising
Wind / gust
13 mph / 22 mph
Typical / low
7.6°C / 7.0°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 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.
Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback →
Daytime · exposed rockClimbing & scramblingBetaRock may be damp or still drying. Gusts near 30 mph may affect balance on exposed rock.Poor35/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look poor (35/100). Some rock may still be damp or drying, especially on polished slabs and vegetated sections. The mapped summit rock is Gneissose pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Gusts may reach about 30 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.
Rock surfaceDamp or dryingPeak gust32 mphRainPossible · 62%
Main factorsgusts around 30 mphdamp or incompletely dried rock possiblemuch of the route may be in cloud
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Friday 25 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind15-35 mph southwesterlyGusts35-45 mphFeels like0 to 4°CPrecipitationAround 2-5 mmCloud-free summit estimate85%Cloud base through day700-1,800 mFreezing level900-1,200 mDaylightSunrise 07:11 · Sunset 19:08 · 11.9 hours daylight
The day on the hill
A wet day on Sgòrr na Diollaid: summit wind broadly 15-35 mph, with gusts 35-45 mph at times (strong winds). Patchy mist is possible in sheltered valleys early on.
Wind & exposure
Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops.
Cloud & views
Cloud base around 1500–1800 m around midday, lowering to 700–1000 m by late afternoon. Cloud is likely to come and go across the top, with views in the clearer spells.
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.
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. 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.
Overall confidence is unavailable: insufficient comparable wind, rain guidance.
Cloud-free timing: Around 95% early, falling to around 55% 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.
Morning · 08:00–12:00
ExcellentSummit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground.
91/100
Afternoon · 12:00–17:00
MixedWinds strengthen compared with the morning. Summit winds around 10-20 mph in the early afternoon, strengthening to 20-30 mph later. 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.
67/100
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 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.9/100Poor · 600 mView detailsHide details
Night beginning Saturday 26 September 2026
Full overnight outlook
Exposed camping is not recommended near 600 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 (9/100). Peak gusts range from about 40 mph at 300 m to 50 mph at 600 m. Roughly 18.2 mm is forecast overnight, with rain liable to affect both pitching and packing up. Condensation risk is high near 300 and 600 m, so a wet pack-up is possible. Ventilation will matter.
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 m39/100 · poor
Wind / gust
25 mph / 41 mph
Typical / low
8.5°C / 8.3°C · much of the night
In cloud
0% of modelled night
Condensation
High
600 m9/100 · very poor
Wind / gust
30 mph / 49 mph
Typical / low
8.5°C / 8.3°C · much of the night
In cloud
0% 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 6°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.
Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback →
Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 40 mph may affect balance on exposed rock.Poor30/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look poor (30/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Gusts may reach about 40 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceWet rock likelyPeak gust38 mphRain2.7 mm
Main factorsgusts around 40 mphwet rock likely
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Saturday 26 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind20-35 mph southwesterlyGusts35-45 mphFeels like-2 to 2°CPrecipitationAround 2-5 mmCloud-free summit estimate70%Cloud base through day600-1,500 mFreezing levelAbove summitDaylightSunrise 07:13 · Sunset 19:05 · 11.9 hours daylight
The day on the hill
A wet day on Sgòrr na Diollaid: summit wind broadly 20-35 mph, with gusts 35-45 mph at times (strong winds). Visibility may drop briefly in showers.
Things to watch
High spate risk through much of the day and into the night, with forecast rain and subsequent runoff. Risk may continue beyond the daytime period shown. Timings are approximate, not a guarantee of safe crossings afterwards. Burns and unbridged crossings may become difficult or impassable. Turn back if a crossing looks unsafe.
Wind & exposure
Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops.
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 -2 to 2°C in the wind. Forecast models differ on summit wind strength.
Treat the wind figures as a guide.
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.
Buffeting may affect balance on exposed ground, particularly near ridges and edges. Overall confidence is unavailable: insufficient comparable wind, rain guidance.
Cloud-free timing: Cloudy early, clearing 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.
Morning · 08:00–12:00
PoorSummit winds around 25-35 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.
20/100
Afternoon · 12:00–17:00
MixedSummit 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 30 mph make meaningful shelter important.59/100Mixed · 600 mView detailsHide details
Night beginning Sunday 27 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 600 m. Open-ground gusts may reach about 30 mph. Seek meaningful shelter. Peak gusts range from about 25 mph at 300 m to 30 mph at 600 m. Around 1.2 mm is forecast, with rain liable to affect both pitching and packing up. Some condensation is possible overnight. Around 600 m it looks cold for several hours, rather than only dipping briefly to 4.4°C.
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 m71/100 · reasonable
Wind / gust
17 mph / 24 mph
Typical / low
5.3°C / 4.4°C · several hours
In cloud
0% of modelled night
Condensation
Moderate
600 m59/100 · mixed
Wind / gust
20 mph / 30 mph
Typical / low
5.3°C / 4.4°C · several hours
In cloud
0% 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.
Did this match your night?Share a quick observation to help improve this beta forecast.Give feedback →
Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 40 mph may affect balance on exposed rock.Poor17/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look very poor (17/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Gneissose pelite and gneissose semipelite (Ben Wyvis Pelite Formation). Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Gusts may reach about 40 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceWet rock likelyPeak gust41 mphRain4.2 mm
Main factorsgusts around 40 mphwet rock likely
Mapped summit rock
Gneissose pelite and gneissose semipeliteBen Wyvis Pelite Formation
Dry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
Did this match your experience?Tell us about the rock surface and wind to help improve this beta forecast.Give feedback →
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 Sgòrr na Diollaid on Sunday 27 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
