Select a day to replace the detailed forecast below. 8 forecast days are available here.
Confidence: Medium
Overall hill weather52/100Mixed
Wind15-35 mph westerlyGusts35-45 mphFeels like-2 to 2°CPrecipitationUp to around 2 mmCloud-free summit estimate65%Cloud base through day500-1,400 mFreezing levelAbove summitDaylightSunrise 07:05 · Sunset 19:30 · 12.4 hours daylight
The day on the hill
On Askival: summit wind broadly 15-35 mph, with gusts 35-45 mph at times (strong winds).
Cloud & views
Cloud base around 500–800 m in the morning, lifting to 800–1100 m around midday and 1100–1400 m by late afternoon. 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.
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 4 to 8°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.
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.
Cloud-free timing: Around 20% early, improving to around 90% later.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 7.9 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 35-45 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Summit cloud is more persistent early in this period, with better prospects later. Rain is forecast during this period.
36/100
Afternoon · 12:00–17:00
MixedSummit winds around 15-25 mph. Gusts around 30-40 mph are possible on exposed ground. Summit cloud is more persistent early in this period, with better prospects later.
67/100
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 mView detailsHide details
Night beginning Sunday 20 September 2026
Full overnight outlook
Open-hillside camping looks mixed overall around 600 m (59/100). 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. Wind direction may change substantially during the night. Shelter that works at dusk may be less effective later. Around 4.3 mm is forecast, including rain around pack-up. 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 / 28 mph
Typical / low
7.6°C / 7.4°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m59/100 · mixed
Wind / gust
16 mph / 34 mph
Typical / low
7.6°C / 7.4°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.
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Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 40 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 Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Gusts may reach about 40 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceWet rock likelyPeak gust40 mphRain0.4 mm
Main factorsgusts around 40 mphwet rock likely
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. 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 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, 21:45 BST to 22:00 BST.
Cloud is likely to obscure much of the sky.
Moon-free dark sky: 20 Sep, 23:45 BST to 21 Sep, 04:55 BST.
Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
Time
Viewing conditions
20 Sep, 21:45 BST to 22:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
20 Sep, 22:00 BST to 23:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
20 Sep, 23:00 BST to 21 Sep, 00:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
21 Sep, 00:00 BST to 01:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
21 Sep, 01:00 BST to 02:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
21 Sep, 02:00 BST to 03:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
21 Sep, 03:00 BST to 04:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Rain may interrupt viewing.
21 Sep, 04:00 BST to 04:55 BST
Poor 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, 23:45 BST.
Full darkness: 20 Sep, 21:45 BST to 21 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 2 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 Askival on Sunday 20 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind20-35 mph southwesterlyGusts35-45 mphFeels like4 to 8°CPrecipitationAround 2-5 mmCloud-free summit estimate30%Cloud base through day600-900 mFreezing levelAbove summitDaylightSunrise 07:07 · Sunset 19:28 · 12.3 hours daylight
The day on the hill
A wet day with extensive summit cloud on Askival: summit wind broadly 20-35 mph, with gusts 35-45 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 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, with some passing showers too. The forecast total is around 2-5 mm, but local amounts will vary.
Forecast models differ on summit wind strength: around 23-37 mph at walker height, with gusts 33-51 mph.
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.
Forecast models differ on whether meaningful rain reaches the hills during the afternoon and evening.
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. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Rain is forecast during this period.
5/100
Afternoon · 12:00–17:00
PoorSummit winds around 20-30 mph. Gusts around 30-40 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Rain is forecast during this period. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
18/100
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. Around 2.7 mm is forecast, 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: 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
23 mph / 35 mph
Typical / low
11.5°C / 11.0°C
In cloud
0% of modelled night
Condensation
High
600 m19/100 · very poor
Wind / gust
27 mph / 42 mph
Typical / low
11.5°C / 11.0°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.
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.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 Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Gusts may reach about 40 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.
Rock surfaceWet rock likelyPeak gust40 mphRain3.3 mm
Main factorsgusts around 40 mphwet rock likelymuch of the route may be in cloud
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. 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 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
Mixed 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, 01:05 BST to 04:55 BST.
Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
Time
Viewing conditions
21 Sep, 21:40 BST to 22:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
21 Sep, 22:00 BST to 23:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
21 Sep, 23:00 BST to 22 Sep, 00:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
22 Sep, 00:00 BST to 01:00 BST
Mixed sky conditions
Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.
Forecast models disagree.
22 Sep, 01:00 BST to 02:00 BST
Mixed 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 BST
Poor sky conditions
Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.
Forecast models disagree.
22 Sep, 03:00 BST to 04:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Reduced visibility may obscure faint objects.
22 Sep, 04:00 BST to 04:55 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Rain may interrupt viewing. 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, 01:05 BST.
Full darkness: 21 Sep, 21:40 BST to 22 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 2 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 Askival on Monday 21 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind10-35 mph westerlyGusts35-45 mphFeels like2 to 6°CPrecipitationUp to around 2 mmCloud-free summit estimate75%Cloud base through day800-1,400 mFreezing levelAbove summitDaylightSunrise 07:09 · Sunset 19:25 · 12.3 hours daylight
The day on the hill
On Askival: summit wind broadly 10-35 mph, with gusts 35-45 mph at times (strong winds). Visibility may drop briefly in showers.
Cloud & views
Cloud base around 800–1100 m in the morning, lifting to 900–1200 m around midday and 1100–1400 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.
Drizzle is forecast at times, with some passing showers too. The forecast total is up to around 2 mm, but local amounts will vary.
Forecast models differ on summit wind strength: around 25-35 mph at walker height, with gusts 32-45 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. 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.
Rain timing may shift by several hours, which could change how much of the main walking period stays dry.
Cloud-free timing: Around 40% early, improving to around 85% later.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 1.4 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 20-30 mph early in the morning, easing to 10-20 mph later. Gusts around 35-45 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Summit cloud is more persistent early in this period, with better prospects later. Rain is forecast during this period.
55/100
Afternoon · 12:00–17:00
GoodWinds ease compared with the morning. Summit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
83/100
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaAbout 1.7 mm is forecast, with rain possible around pack-up.80/100Good · 600 mView detailsHide details
Night beginning Tuesday 22 September 2026
Full overnight outlook
Open-hillside camping looks promising overall around 600 m (80/100). Light winds are expected on open ground, though local shelter and exposure still matter. Around 1.7 mm is forecast, including rain around pack-up. A wet pack-up remains possible from dew or brief dampness toward dawn.
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 m80/100 · promising
Wind / gust
6 mph / 10 mph
Typical / low
7.5°C / 5.8°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m80/100 · promising
Wind / gust
7 mph / 12 mph
Typical / low
7.5°C / 5.8°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 40 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 Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Gusts may reach about 40 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceWet rock likelyPeak gust38 mphRain1.0 mm
Main factorsgusts around 40 mphwet rock likely
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. 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 darkBetaCloud is likely to obscure much of the sky.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: 23 Sep, 03:00 BST to 04:00 BST.
Cloud is likely to obscure much of the sky.
Moon-free dark sky: 23 Sep, 02:35 BST to 05:00 BST.
Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
Time
Viewing conditions
22 Sep, 21:35 BST to 22:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
22 Sep, 22:00 BST to 23:00 BST
Poor 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 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
23 Sep, 00:00 BST to 01:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
23 Sep, 01:00 BST to 02:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
23 Sep, 02:00 BST to 03:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
23 Sep, 03:00 BST to 04:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
23 Sep, 04:00 BST to 05:00 BST
Poor 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, 02:35 BST.
Full darkness: 22 Sep, 21:35 BST to 23 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 2 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 Askival on Tuesday 22 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind10-20 mph northwesterlyGusts15-25 mphFeels like-2 to 2°CPrecipitationUp to around 2 mmCloud-free summit estimate80%Cloud base through day1,000-1,600 mFreezing levelAbove summitDaylightSunrise 07:11 · Sunset 19:22 · 12.2 hours daylight
The day on the hill
On Askival: summit wind broadly 10-20 mph, with gusts 15-25 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. 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 65% early, improving to around 95% later.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 6.6 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
MixedSummit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground. Summit cloud becomes more persistent later. Rain is forecast during this period.
69/100
Afternoon · 12:00–17:00
ExcellentSummit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground. Rain is forecast during this period.
86/100
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 Wednesday 23 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. Wind direction may change substantially during the night. Shelter that works at dusk may be less effective later. Little overnight rain is forecast.
Extensive cloud may limit moonlight. 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 m59/100 · mixed
Wind / gust
9 mph / 29 mph
Typical / low
6.6°C / 6.4°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m39/100 · poor
Wind / gust
10 mph / 35 mph
Typical / low
6.6°C / 6.4°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.Poor43/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look mixed (43/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.
Rock surfaceWet rock likelyPeak gust20 mphRain1.6 mm
Main concernwet rock likely
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. 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 darkBetaCloud is likely to obscure much of the sky. Moonlight washes out fainter stars.View forecastClose forecast
After dark: aurora and stargazing
Night beginning 2026-09-23. All times are UK local time.
Stargazing
Mixed sky conditions during the best available spell: 23 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: 24 Sep, 03:55 BST to 05:00 BST.
Sky conditions through the night
Fully dark periods. Conditions can change between forecast hours.
Time
Viewing conditions
23 Sep, 21:35 BST to 22:00 BST
Mixed sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
23 Sep, 22:00 BST to 23:00 BST
Mixed sky conditions
Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.
Forecast models disagree.
23 Sep, 23:00 BST to 24 Sep, 00:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
24 Sep, 00:00 BST to 01:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
24 Sep, 01:00 BST to 02:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
24 Sep, 02:00 BST to 03:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
24 Sep, 03:00 BST to 04:00 BST
Poor sky conditions
Clearer spells are possible, but other forecasts keep much of the sky obscured by cloud.
Forecast models disagree.
24 Sep, 04:00 BST to 05:00 BST
Poor 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
Gibbous moon, about 92% illuminated.
Moonrise around 23 Sep, 18:35 BST.
Moonset around 24 Sep, 03:55 BST.
Full darkness: 23 Sep, 21:35 BST to 24 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 2 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 Askival on Wednesday 23 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind35-50 mph southerlyGusts55-65 mphFeels like-2 to 2°CPrecipitationUp to around 2 mmCloud-free summit estimate90%Freezing levelAbove summitDaylightSunrise 07:13 · Sunset 19:19 · 12.1 hours daylight
The day on the hill
Strong gusts on Askival: summit wind broadly 35-50 mph, with gusts 55-65 mph at times (gale-force mean winds at times).
Cloud & views
Cloud base mostly around 1100–1400 m through daylight. 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.
Cloud may hang lower on southern slopes and lift somewhat on the northern side, but local terrain can differ. Very little direct sunshine is likely, with extensive cloud.
Drizzle is forecast at times, with some passing showers too. The forecast total is up to around 2 mm, but local amounts will vary.
Cold on exposed tops: air temperature broadly 4 to 8°C, feeling around -2 to 2°C in the wind. Forecast models differ on summit wind strength: around 43-51 mph at walker height, with gusts 57-67 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.
The strongest gusts could knock you over on exposed ground. Avoid exposed ridges and edges.
Rain timing may shift by several hours, which could change how much of the main walking period stays dry.
Cloud-free timing: Around 90% early, falling to around 80% 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.
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. Rain is possible during the morning, but forecast models disagree on whether it will fall.
39/100
Afternoon · 12:00–17:00
PoorWinds strengthen compared with the morning. Summit winds around 40-50 mph. Gusts around 55-65 mph are possible on exposed ground. The strongest gusts could knock you over on exposed ground. Avoid exposed ridges and edges. Some forecast models bring rain during the afternoon, while others keep it mostly dry.
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 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. Roughly 6.8 mm is forecast overnight, 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 m9/100 · very poor
Wind / gust
25 mph / 46 mph
Typical / low
10.1°C / 9.2°C · several hours
In cloud
0% of modelled night
Condensation
Moderate
600 m9/100 · very poor
Wind / gust
30 mph / 55 mph
Typical / low
9.8°C / 9.1°C · several hours
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 & scramblingBetaWet rock is likely. Gusts near 60 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 Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Gusts may reach about 60 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceWet rock likelyPeak gust62 mphRain0.3 mm
Main factorsgusts around 60 mphwet rock likely
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. 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 darkBetaCloud is likely to obscure much of the sky.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, 04:00 BST to 05:00 BST.
Cloud is likely to obscure much of the sky.
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.
Time
Viewing conditions
24 Sep, 21:30 BST to 22:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Moonlight washes out fainter stars.
24 Sep, 22:00 BST to 23:00 BST
Poor 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 BST
Poor 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 BST
Poor 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 BST
Poor 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 BST
Poor 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 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Rain may interrupt viewing. Moonlight washes out fainter stars.
25 Sep, 04:00 BST to 05:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
25 Sep, 05:00 BST to 05:05 BST
Poor sky conditions
Cloud is likely to obscure much of the sky.
Moon, darkness and meteor showers
Near-full moon, about 96% illuminated.
Moonrise around 24 Sep, 18:40 BST.
Moonset around 25 Sep, 05:20 BST.
Full darkness: 24 Sep, 21:30 BST to 25 Sep, 05:05 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 2 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 Askival on Thursday 24 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind10-20 mph southwesterlyGusts15-25 mphFeels like0 to 4°CPrecipitationUp to around 2 mmCloud-free summit estimate80%Cloud base through day900-2,200 mFreezing levelAbove summitDaylightSunrise 07:15 · Sunset 19:17 · 12.0 hours daylight
The day on the hill
On Askival: summit wind broadly 10-20 mph, with gusts 15-25 mph at times (a moderate breeze).
Things to watch
Thunderstorms are possible from early morning into the afternoon. Keep an escape route from exposed ridges and descend if thunder develops.
If a thunderstorm develops, sudden gusts and heavy rain can change conditions quickly.
Cloud & views
Cloud base around 900–1200 m in the morning, then around 1900–2200 m around midday and 1100–1400 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.
Drizzle is forecast at times. The forecast total is up to around 2 mm, but local amounts will vary.
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. A low thunderstorm risk remains difficult to time precisely.
Cloud-free timing: Around 65% early, improving to around 90% 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
GoodSummit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground. Rain is possible during the morning, but forecast models disagree on whether it will fall.
76/100
Afternoon · 12:00–17:00
MixedSummit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground. Rain is forecast during this period. Some forecast models bring rain during the afternoon, while others keep it mostly dry.
69/100
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 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). 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 82/100.
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: 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 / 16 mph
Typical / low
8.1°C / 8.0°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m82/100 · promising
Wind / gust
13 mph / 19 mph
Typical / low
8.2°C / 8.1°C · much of the night
In cloud
13% 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 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. Low thunderstorm risk. Avoid exposed rock if storms develop.Poor23/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look poor (23/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Low thunderstorm risk, broadly from early morning into the afternoon. Avoid committing to exposed ground if storms develop.
Rock surfaceWet rock likelyPeak gust20 mphRain0.6 mm
Main factorslow thunderstorm risk on exposed groundwet rock likely
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. 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 darkBetaCloud breaks may offer some views of the stars. Rain may interrupt viewing. Moonlight washes out fainter stars.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.
Cloud breaks may offer some views of the stars. Rain may interrupt viewing. 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.
Time
Viewing conditions
25 Sep, 21:25 BST to 22:00 BST
Poor sky conditions
Cloud breaks may offer some views of the stars. Rain may interrupt viewing. Moonlight washes out fainter stars.
25 Sep, 22:00 BST to 23:00 BST
Poor sky conditions
Cloud breaks may offer some views of the stars. Rain may interrupt viewing. Moonlight washes out fainter stars.
25 Sep, 23:00 BST to 26 Sep, 00:00 BST
Poor 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 BST
Poor 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 BST
Poor 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 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
26 Sep, 03:00 BST to 04:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
26 Sep, 04:00 BST to 05:00 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
26 Sep, 05:00 BST to 05:05 BST
Poor sky conditions
Cloud is likely to obscure much of the sky. Moonlight washes out fainter stars.
Moon, darkness and meteor showers
Near-full moon, about 99% illuminated.
Moonrise around 25 Sep, 18:45 BST.
Moonset around 26 Sep, 06:45 BST.
Full darkness: 25 Sep, 21:25 BST to 26 Sep, 05:05 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 2 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 Askival 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°CPrecipitationUp to around 2 mmCloud-free summit estimate75%Cloud base through day700-3,200 mFreezing levelAbove summitDaylightSunrise 07:17 · Sunset 19:14 · 11.9 hours daylight
The day on the hill
Light rain for several hours on Askival: summit wind broadly 15-35 mph, with gusts 35-45 mph at times (strong winds).
Cloud & views
Cloud base around 700–1000 m in the morning, lifting to 1900–2200 m around midday and 2900–3200 m by late afternoon. 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. The forecast total is up to around 2 mm, but local amounts will vary.
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.
Treat the wind figures as a guide. 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.
Forecast confidence
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
MixedSummit winds around 15-25 mph. Gusts around 20-30 mph are possible on exposed ground. Summit cloud is more persistent early in this period, with better prospects later.
67/100
Afternoon · 12:00–17:00
MixedSummit winds around 15-30 mph. Gusts around 35-45 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Summit cloud becomes more persistent later. 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 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. High thunderstorm risk.0/100Poor · 600 mView detailsHide details
Night beginning Saturday 26 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 (0/100). Peak gusts range from about 45 mph at 300 m to 55 mph at 600 m. Roughly 13 mm is forecast overnight, with rain liable to affect both pitching and packing up. Some condensation is possible overnight. High thunderstorm risk, broadly from overnight into early morning. Avoid exposed ridges and summits and be prepared to descend.
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 m0/100 · very poor
Wind / gust
26 mph / 45 mph
Typical / low
9.4°C / 7.4°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m0/100 · very poor
Wind / gust
31 mph / 54 mph
Typical / low
9.4°C / 7.4°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.
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.Poor29/100View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Conditions for exposed scrambling look poor (29/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Gusts may reach about 40 mph. Crosswinds can make exposed ridges substantially more serious.
Rock surfaceWet rock likelyPeak gust39 mphRain1.5 mm
Main factorsgusts around 40 mphwet rock likely
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Summit-point bedrock mapping; the actual route may cross different rock, superficial deposits, polish, lichen or seepage.
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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, 21:25 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.
Time
Viewing conditions
26 Sep, 21:25 BST to 22:00 BST
Poor 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 BST
Poor 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 BST
Poor 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 BST
Poor 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 BST
Poor 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.
Limited model coverage.
27 Sep, 02:00 BST to 03:00 BST
Poor 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.
Limited model coverage.
27 Sep, 03:00 BST to 04:00 BST
Poor 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 BST
Poor 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, 05:00 BST to 05:10 BST
Poor 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, 18:50 BST.
Full darkness: 26 Sep, 21:25 BST to 27 Sep, 05:10 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 2 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 Askival on Saturday 26 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Wind20-35 mph southwesterlyGusts40-50 mphFeels like0 to 4°CPrecipitationUp to around 2 mmCloud-free summit estimate95%Cloud base through day1,200-1,800 mFreezing levelAbove summitDaylightSunrise 07:19 · Sunset 19:11 · 11.9 hours daylight
The day on the hill
On Askival: summit wind broadly 20-35 mph, with gusts 40-50 mph at times (strong winds).
Things to watch
Thunderstorms are forecast early in the morning. Avoid exposed summits and ridges during the risk period.
If a thunderstorm develops, sudden gusts and heavy rain can change conditions quickly. Visibility may drop briefly in showers.
Possible spate risk during the morning, with forecast rain and subsequent runoff. Timings are approximate, not a guarantee of safe crossings afterwards. Burns and unbridged crossings may rise quickly. Turn back if a crossing looks unsafe.
Cloud & views
Cloud base around 1200–1500 m in the morning, lifting to 1500–1800 m around midday. The summit is likely to stay mostly clear.
Rain & temperature
Some rain may fall as showers. The forecast total is up to around 2 mm, but local amounts will vary.
Cold on exposed tops: air temperature broadly 4 to 8°C, feeling around 0 to 4°C in the wind. A windproof layer will help, with an extra warm layer for stops.
Buffeting may affect balance on exposed ground, particularly near ridges and edges.
Forecast confidence
Overall confidence is unavailable: insufficient comparable wind, rain guidance.
Cloud-free timing: Around 60% early, improving to around 95% 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 40-50 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Summit cloud is more persistent early in this period, with better prospects later.
17/100
Afternoon · 12:00–17:00
GoodSummit winds around 20-30 mph. Gusts around 30-40 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges.
70/100
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaLow thunderstorm risk. Avoid an exposed pitch if storms develop.39/100Poor · 600 mView detailsHide details
Night beginning Sunday 27 September 2026
Full overnight outlook
Open-hillside camping looks poor overall around 600 m (39/100). It may be breezy on open ground, with gusts near 25 mph. Roughly 14.9 mm is forecast overnight, with rain liable to affect both pitching and packing up. Some condensation is possible overnight. Around 600 m the low near 4.9°C is forecast for a brief spell. Low thunderstorm risk, broadly from overnight into early morning. Avoid exposed ridges and summits and be prepared to descend.
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 m39/100 · poor
Wind / gust
14 mph / 23 mph
Typical / low
5.7°C / 4.8°C · a brief spell
In cloud
0% of modelled night
Condensation
Moderate
600 m39/100 · poor
Wind / gust
17 mph / 27 mph
Typical / low
5.7°C / 4.8°C · a brief spell
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.
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Daytime · exposed rockClimbing & scramblingBetaHigh thunderstorm risk. Avoid exposed rock if storms develop. Rock may be damp or still drying. 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). Recent rain may leave seepage and damp rock, especially on shaded sections. The mapped summit rock is Bytownite troctolite (Eastern Intrusion (Rum Layered Suite)). Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. Gusts may reach about 45 mph. Crosswinds can make exposed ridges substantially more serious. High thunderstorm risk, broadly early in the morning. Avoid committing to exposed ground if storms develop.
Rock surfaceDry overhead; seepage uncertainPeak gust44 mphRain0.0 mm
Main factorshigh thunderstorm risk on exposed groundgusts around 45 mphdamp or incompletely dried rock possible
Mapped summit rock
Bytownite troctoliteEastern Intrusion (Rum Layered Suite)
Generally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery. 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 Askival on Sunday 27 September 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
