Mountain Weather

Crib Goch weather forecast.

923 m summit in Eryri (Snowdonia). 8 forecast days covering wind, cloud, rain and temperature, updated 20 September 2026 at 16:08 UTC.

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Confidence: Medium
Overall hill weather74/100Good
Wind10-30 mph northwesterly Gusts35-45 mph Feels like-2 to 2°C PrecipitationLittle or none Cloud-free summit estimate80% Cloud base through day800-1,800 m Freezing levelAbove summit DaylightSunrise 06:57 · Sunset 19:20 · 12.4 hours daylight

The day on the hill

On Crib Goch: summit wind broadly 10-30 mph, with gusts 35-45 mph at times (strong winds).

Wind & exposure

Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops.

Cloud & views

Cloud base around 800–1100 m in the morning, lifting to 1500–1800 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.

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

Rain & temperature

The ground is likely to be wet after recent rain. Little or no rain is forecast.

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 25-29 mph at walker height, with gusts 35-41 mph.

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: Cloudy early, clearing later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 8.6 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.

Early
Less than 1 hour
Midday
3.9 h
Later
2.4 h

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

Morning · 08:00–12:00 Mixed Summit winds around 15-30 mph. Gusts around 30-40 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.
57/100
Afternoon · 12:00–17:00 Excellent Winds ease compared with the morning. Summit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground.
90/100

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

Overnight · 17:00–08:00Wild campingBetaA broadly very good night on a well-chosen pitch. 96/100Excellent · 600 m View detailsHide details
Night beginning Sunday 20 September 2026

Full overnight outlook

Open-hillside camping looks very good overall around 600 m (96/100). It may be breezy on open ground, with gusts near 20 mph. Peak gusts range from about 15 mph at 300 m to 20 mph at 900 m. Little overnight rain is forecast. The coldest temperature falls from about 8.8°C at 300 m to 7.1°C at 900 m.

Overnight rain0.0 mm Open ground · 600 m10 mph · gusts 18 mph Morning pack-upNo wet signal Sleeping-bag warmthISO comfort rating about 6°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
70%
Moonrise
17:16 BST
Moonset
00:15 next morning BST

Clear spells may allow a view of the Moon. 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 m97/100 · very good
Wind / gust
8 mph / 15 mph
Typical / low
9.2°C / 8.8°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m96/100 · very good
Wind / gust
10 mph / 18 mph
Typical / low
9.2°C / 8.8°C · much of the night
In cloud
0% of modelled night
Condensation
Low
900 m92/100 · very good
Wind / gust
11 mph / 21 mph
Typical / low
8.6°C / 7.1°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 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.

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

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

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

Daytime · exposed rockClimbing & scramblingBetaRock may be damp or still drying. Gusts near 35 mph may affect balance on exposed rock. Mixed56/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look mixed (56/100). Recent rain may leave seepage and damp rock, especially on shaded sections. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 35 mph. Crosswinds can make exposed ridges substantially more serious.

Rock surfaceDry overhead; seepage uncertainPeak gust36 mphRain0.0 mm
Main factorsgusts around 35 mphdamp or incompletely dried rock possible
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

Confidence: Medium
Overall hill weather64/100Mixed
Wind5-20 mph westerly Gusts15-25 mph Feels like8 to 12°C PrecipitationUp to around 2 mm Cloud-free summit estimate25% Cloud base through day700-1,000 m Freezing levelAbove summit DaylightSunrise 06:59 · Sunset 19:18 · 12.3 hours daylight

The day on the hill

Frequent summit cloud on Crib Goch: summit wind broadly 5-20 mph, with gusts 15-25 mph at times (a moderate breeze).

Cloud & views

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

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

Any sunshine may be confined to lower ground or breaks away from the summit. Drizzle is forecast at times.

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

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. 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 Less than 1 hour of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

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

Early
Less than 1 hour
Midday
Less than 1 hour
Later
0 h

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

Morning · 08:00–12:00 Mixed Summit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground.
66/100
Afternoon · 12:00–17:00 Mixed Summit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground. Rain is forecast during this period.
61/100

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

Overnight · 17:00–08:00Wild campingBetaAbout 1.4 mm is forecast, with rain liable to affect both pitching and packing up. 64/100Mixed · 600 m View detailsHide details
Night beginning Monday 21 September 2026

Full overnight outlook

Open-hillside camping looks reasonable overall around 600 m (64/100). Light winds are expected on open ground, though local shelter and exposure still matter. Peak gusts range from about 15 mph at 300 m to 20 mph at 900 m. Around 1.4 mm is forecast, with rain liable to affect both pitching and packing up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 300, 600 and 900 m. Ventilation will matter.

Overnight rain1.4 mm Open ground · 600 m7 mph · gusts 16 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 10°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
78%
Moonrise
17:40 BST
Moonset
01:31 next morning BST

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

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

Elevation reference (open ground)

300 m64/100 · reasonable
Wind / gust
6 mph / 13 mph
Typical / low
12.1°C / 12.0°C
In cloud
0% of modelled night
Condensation
High
600 m64/100 · reasonable
Wind / gust
7 mph / 16 mph
Typical / low
12.1°C / 12.0°C
In cloud
0% of modelled night
Condensation
High
900 m54/100 · mixed
Wind / gust
8 mph / 18 mph
Typical / low
11.8°C / 10.8°C
In cloud
100% of modelled night
Condensation
High

Warmth planning: As a broad starting point, consider a 2-season bag with an ISO/EN comfort rating at or below about 10°C. Allow more margin if you sleep cold or expect fatigue, and use an adequate insulated mat. Dampness is possible, so keep the sleep system dry and ensure its insulation remains effective if damp.

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

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

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

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Poor32/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look poor (32/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust20 mphRain0.7 mm
Main factorswet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

Confidence: Medium
Overall hill weather56/100Mixed
Wind5-20 mph southwesterly Gusts15-25 mph Feels like6 to 10°C PrecipitationUp to around 2 mm Cloud-free summit estimate20% Cloud base through day600-900 m Freezing levelAbove summit DaylightSunrise 07:01 · Sunset 19:15 · 12.2 hours daylight

The day on the hill

Frequent summit cloud on Crib Goch: summit wind broadly 5-20 mph, with gusts 15-25 mph at times (light 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.

Any sunshine may be confined to lower ground or breaks away from the summit. Drizzle is forecast for much of the day.

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. 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 1.2 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

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

Early
0 h
Midday
0 h
Later
1.2 h

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

Morning · 08:00–12:00 Mixed Summit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground. Rain is forecast during this period.
53/100
Afternoon · 12:00–17:00 Mixed Summit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground. Rain is forecast during this period.
60/100

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

Overnight · 17:00–08:00Wild campingBetaAbout 2.8 mm is forecast, with rain liable to affect both pitching and packing up. 64/100Mixed · 600 m View detailsHide details
Night beginning Tuesday 22 September 2026

Full overnight outlook

Open-hillside camping looks reasonable overall around 600 m (64/100). It may be breezy on open ground, with gusts near 25 mph. Peak gusts range from about 15 mph at 300 m to 25 mph at 900 m. Around 2.8 mm is forecast, with rain liable to affect both pitching and packing up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 300, 600 and 900 m. Ventilation will matter. The coldest temperature falls from about 11.6°C at 300 m to 9.8°C at 900 m.

Overnight rain2.8 mm Open ground · 600 m8 mph · gusts 20 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 8°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
86%
Moonrise
17:57 BST
Moonset
02:49 next morning BST

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

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

Elevation reference (open ground)

300 m64/100 · reasonable
Wind / gust
7 mph / 17 mph
Typical / low
11.8°C / 11.6°C
In cloud
0% of modelled night
Condensation
High
600 m64/100 · reasonable
Wind / gust
8 mph / 20 mph
Typical / low
11.8°C / 11.6°C
In cloud
0% of modelled night
Condensation
High
900 m54/100 · mixed
Wind / gust
10 mph / 24 mph
Typical / low
10.7°C / 9.8°C · a brief spell
In cloud
100% of modelled night
Condensation
High

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

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

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

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

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Poor31/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look poor (31/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust18 mphRain1.4 mm
Main factorswet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

Confidence: Medium
Overall hill weather28/100Poor
Wind15-25 mph northwesterly Gusts25-35 mph Feels like-2 to 2°C PrecipitationAround 10-20 mm Cloud-free summit estimate30% Cloud base through day600-1,100 m Freezing levelAbove summit DaylightSunrise 07:03 · Sunset 19:13 · 12.2 hours daylight

The day on the hill

Frequent summit cloud on Crib Goch: summit wind broadly 15-25 mph, with gusts 25-35 mph at times (a fresh breeze).

Things to watch

Thunderstorms are possible from early morning into around midday. 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. Visibility may drop briefly in showers.

Cloud & views

Cloud base around 600–900 m through the morning, lifting to 800–1100 m by late afternoon. Summit cloud is likely, but brief clear spells remain possible if the cloud sits higher than expected.

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

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

Rain & temperature

Rain and drizzle are forecast for much of the day, with some passing showers too. The forecast total is around 10-20 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 15-28 mph at walker height, with gusts 20-39 mph.

Forecast confidence

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

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

A low thunderstorm risk remains difficult to time precisely.

Cloud-free timing: Around 15% early, improving to around 45% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 4.3 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.

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

Early
0 h
Midday
Less than 1 hour
Later
3 h

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

Morning · 08:00–12:00 Poor Summit winds around 15-25 mph. Gusts around 20-30 mph are possible on exposed ground. Rain is forecast during this period. Rain is possible during the morning, but forecast models disagree on whether it will fall.
23/100
Afternoon · 12:00–17:00 Poor Summit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground. Rain is forecast during this period.
33/100

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. 81/100Good · 600 m View detailsHide details
Night beginning Wednesday 23 September 2026

Full overnight outlook

Open-hillside camping looks promising overall around 600 m (81/100). A lower pitch near 300 m looks more comfortable. Conditions are less suitable by 900 m. Open-ground gusts may reach about 30 mph. Seek meaningful shelter. Peak gusts range from about 20 mph at 300 m to 30 mph at 900 m. Wind direction may change substantially during the night. Shelter that works at dusk may be less effective later. Little overnight rain is forecast. Some condensation is possible overnight. The coldest temperature falls from about 8.2°C at 300 m to 5.7°C at 900 m.

Overnight rain0.2 mm Open ground · 600 m10 mph · gusts 25 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 6°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
92%
Moonrise
18:10 BST
Moonset
04:08 next morning BST

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

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

Elevation reference (open ground)

300 m88/100 · very good
Wind / gust
8 mph / 21 mph
Typical / low
8.3°C / 8.2°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m81/100 · promising
Wind / gust
10 mph / 25 mph
Typical / low
8.3°C / 8.2°C · much of the night
In cloud
0% of modelled night
Condensation
Low
900 m59/100 · mixed
Wind / gust
11 mph / 30 mph
Typical / low
6.4°C / 5.7°C · much of the night
In cloud
20% 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.

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

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

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

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 30 mph may affect balance on exposed rock. Low thunderstorm risk. Avoid exposed rock if storms develop. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 30 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder. Low thunderstorm risk, broadly from early morning into around midday. Avoid committing to exposed ground if storms develop.

Rock surfaceWet rock likelyPeak gust30 mphRain10.3 mm
Main factorslow thunderstorm risk on exposed groundgusts around 30 mphwet rock likely
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

Confidence: Medium
Overall hill weather70/100Good
Wind15-35 mph southwesterly Gusts35-45 mph Feels like2 to 6°C PrecipitationLittle or none Cloud-free summit estimate85% Cloud base through day800-2,000 m Freezing levelAbove summit DaylightSunrise 07:04 · Sunset 19:10 · 12.1 hours daylight

The day on the hill

On Crib Goch: summit wind broadly 15-35 mph, with gusts 35-45 mph at times (strong winds).

Wind & exposure

Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops.

Cloud & views

Cloud base around 1300–1600 m in the morning, then around 1700–2000 m around midday and 800–1100 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.

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

Rain & temperature

The ground is likely to be wet after recent rain. Little or no rain is forecast.

Forecast models differ on summit wind strength: around 18-32 mph at walker height, with gusts 26-45 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. 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 90% early, falling to around 55% later.

Sunshine context Model-grid estimate, not summit sunshine

The surrounding model grid indicates 9.1 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
Less than 1 hour
Midday
4 h
Later
3 h

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

Morning · 08:00–12:00 Excellent Summit winds around 5-20 mph. Gusts around 20-30 mph are possible on exposed ground.
86/100
Afternoon · 12:00–17:00 Mixed Winds strengthen compared with the morning. Summit winds around 20-30 mph. Gusts around 35-45 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges.
55/100

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

Overnight · 17:00–08:00Wild campingBetaExposed camping is not recommended near 600 and 900 m: gusts may reach about 50 mph. Sustained winds may reach about 35 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. 19/100Poor · 600 m View detailsHide details
Night beginning Thursday 24 September 2026

Full overnight outlook

Exposed camping is not recommended near 600 and 900 m: gusts may reach about 50 mph. Sustained winds may reach about 35 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. Open-hillside camping looks very poor overall around 600 m (19/100). Peak gusts range from about 35 mph at 300 m to 50 mph at 900 m. Roughly 5.5 mm is forecast overnight, including rain around pack-up. Pitches near 600 and 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 300, 600 and 900 m. Ventilation will matter. The coldest temperature falls from about 10.6°C at 300 m to 8.6°C at 900 m.

Overnight rain5.5 mm Open ground · 600 m26 mph · gusts 42 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 8°C or lower

Moon overnight

Waxing gibbous moon

Illuminated disc
97%
Moonrise
18:22 BST
Moonset
05:27 next morning BST

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

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

Elevation reference (open ground)

300 m39/100 · poor
Wind / gust
22 mph / 35 mph
Typical / low
11.6°C / 10.6°C
In cloud
0% of modelled night
Condensation
High
600 m19/100 · very poor
Wind / gust
26 mph / 42 mph
Typical / low
11.6°C / 10.6°C
In cloud
73% of modelled night
Condensation
High
900 m9/100 · very poor
Wind / gust
30 mph / 50 mph
Typical / low
9.7°C / 8.6°C · much of the night
In cloud
100% of modelled night
Condensation
High

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

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

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

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

Daytime · exposed rockClimbing & scramblingBetaRock may be damp or still drying. Gusts near 40 mph may affect balance on exposed rock. Poor34/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look poor (34/100). Recent rain may leave seepage and damp rock, especially on shaded sections. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 40 mph. Crosswinds can make exposed ridges substantially more serious.

Rock surfaceDry overhead; seepage uncertainPeak gust40 mphRainPossible · 28%
Main factorsgusts around 40 mphdamp or incompletely dried rock possible
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

Confidence: Medium
Overall hill weather48/100Poor
Wind10-30 mph westerly Gusts30-40 mph Feels like0 to 4°C PrecipitationAround 5-10 mm Cloud-free summit estimate40% Cloud base through day500-1,500 m Freezing levelAbove summit DaylightSunrise 07:06 · Sunset 19:08 · 12.0 hours daylight

The day on the hill

A wet day with extensive summit cloud on Crib Goch: summit wind broadly 10-30 mph, with gusts 30-40 mph at times (strong winds).

Wind & exposure

Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops.

Cloud & views

Cloud base around 500–800 m in the morning, lifting to 600–900 m around midday and 1200–1500 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening.

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

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

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

Cold on exposed tops: air temperature broadly 4 to 8°C, feeling around 0 to 4°C in the wind. Forecast models differ on summit wind strength: around 18-44 mph at walker height, with gusts 25-62 mph.

Forecast confidence

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

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

Buffeting may affect balance on exposed ground, particularly near ridges and edges. Summit wind could be roughly 18-44 mph, which changes how difficult exposed walking may feel.

Cloud-free timing: Around 15% early, improving to around 95% later.

Sunshine context Model-grid estimate, not summit sunshine

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

Early
0 h
Midday
0 h
Later
0 h

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

Morning · 08:00–12:00 Poor Summit winds around 20-30 mph early in the morning, easing to 10-20 mph later. 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. Some forecast models bring rain during the morning, while others keep it mostly dry.
35/100
Afternoon · 12:00–17:00 Mixed Winds ease compared with the morning. Summit winds around 5-15 mph. Gusts around 10-20 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. Some forecast models bring rain during the afternoon, while others keep it mostly dry.
61/100

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 m View 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. Peak gusts range from about 15 mph at 300 m to 20 mph at 900 m. Little overnight rain is forecast. The coldest temperature falls from about 7.5°C at 300 m to 4.6°C at 900 m. Forecast models are not closely enough agreed for an exceptional grade. The grade is capped at 82/100.

Overnight rain0.0 mm Open ground · 600 m6 mph · gusts 16 mph Morning pack-upNo wet signal Sleeping-bag warmthISO comfort rating about 4°C or lower

Moon overnight

Near-full moon

Illuminated disc
99%
Moonrise
18:32 BST
Moonset
06:48 next morning BST

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

Overnight window: 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
5 mph / 13 mph
Typical / low
8.8°C / 7.5°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m82/100 · promising
Wind / gust
6 mph / 16 mph
Typical / low
8.8°C / 7.5°C · much of the night
In cloud
0% of modelled night
Condensation
Low
900 m82/100 · promising
Wind / gust
6 mph / 18 mph
Typical / low
5.3°C / 4.6°C · several hours
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.

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

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

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

Daytime · exposed rockClimbing & scramblingBetaWet rock is likely. Gusts near 35 mph may affect balance on exposed rock. Poor0/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 35 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust37 mphRain7.4 mm
Main factorsgusts around 35 mphwet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

Confidence: Unavailable
Overall hill weather95/100Excellent
Wind5-20 mph southwesterly Gusts10-20 mph Feels like2 to 6°C PrecipitationLittle or none Cloud-free summit estimate95% Freezing levelAbove summit DaylightSunrise 07:08 · Sunset 19:06 · 12.0 hours daylight

The day on the hill

Little rain and limited summit cloud on Crib Goch: summit wind broadly 5-20 mph, with gusts 10-20 mph at times (light winds).

Cloud & views

Cloud base around 1200–1500 m in the morning, then around 1800–2100 m around midday and 1600–1900 m by late afternoon. The summit is likely to stay mostly clear.

Rain & temperature

The ground is likely to be wet after recent rain. Little or no rain is forecast.

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

Cloud-free timing: Around 80% 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.

Early
2 h
Midday
4 h
Later
3 h

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

Morning · 08:00–12:00 Excellent Summit winds around 0-10 mph. Gusts around 5-15 mph are possible on exposed ground.
93/100
Afternoon · 12:00–17:00 Excellent Summit winds around 5-15 mph. Gusts around 5-15 mph are possible on exposed ground.
97/100

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

Overnight · 17:00–08:00Wild campingBetaExposed camping is not recommended near 600 and 900 m: gusts may reach about 50 mph. Sustained winds may reach about 35 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. 19/100Poor · 600 m View detailsHide details
Night beginning Saturday 26 September 2026

Full overnight outlook

Exposed camping is not recommended near 600 and 900 m: gusts may reach about 50 mph. Sustained winds may reach about 35 mph at times. Choose an alternative off the exposed hill. Do not rely on finding shelter after setting out. Open-hillside camping looks very poor overall around 600 m (19/100). Peak gusts range from about 35 mph at 300 m to 50 mph at 900 m. Roughly 5.5 mm is forecast overnight, including rain around pack-up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. The coldest temperature falls from about 9.1°C at 300 m to 7.4°C at 900 m.

Overnight rain5.5 mm Open ground · 600 m22 mph · gusts 44 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 6°C or lower

Moon overnight

Near-full moon

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

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

Overnight window: 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
18 mph / 36 mph
Typical / low
9.8°C / 9.1°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m19/100 · very poor
Wind / gust
22 mph / 44 mph
Typical / low
9.8°C / 9.1°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
900 m9/100 · very poor
Wind / gust
26 mph / 52 mph
Typical / low
8.2°C / 7.4°C · much of the night
In cloud
53% 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.

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

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

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

Daytime · exposed rockClimbing & scramblingBetaRock may be damp or still drying. Good82/100 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Conditions for exposed scrambling look good (82/100). Recent rain may leave seepage and damp rock, especially on shaded sections. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain.

Rock surfaceDry overhead; seepage uncertainPeak gust14 mphRain0.0 mm
Main concerndamp or incompletely dried rock possible
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

Confidence: Unavailable
Overall hill weather12/100Poor
Wind25-40 mph southwesterly Gusts40-50 mph Feels like2 to 6°C PrecipitationAround 10-20 mm Cloud-free summit estimate30% Cloud base through day700-1,000 m Freezing levelAbove summit DaylightSunrise 07:09 · Sunset 19:03 · 11.9 hours daylight

The day on the hill

Strong gusts and frequent summit cloud on Crib Goch: summit wind broadly 25-40 mph, with gusts 40-50 mph at times (strong winds). Visibility may drop briefly in showers.

Things to watch

High spate risk through the day and overnight, 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 10-20 mph in the valley, rising towards the tops. Gusts may knock you off balance on exposed ground, even between spells of lighter wind.

Cloud & views

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

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

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

Frequent showers are forecast. The forecast total is around 10-20 mm, but local amounts will vary.

Forecast models disagree markedly on summit wind strength. Check again nearer the time.

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.

Forecast confidence

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

Sunshine context Model-grid estimate, not summit sunshine

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

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

Early
1.4 h
Midday
4 h
Later
2.8 h

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

Morning · 08:00–12:00 Poor Summit winds around 25-35 mph. Gusts around 40-50 mph are possible on exposed ground. Gusts may knock you off balance on exposed ground, even between spells of lighter wind. Rain is forecast during this period.
10/100
Afternoon · 12:00–17:00 Poor Summit winds around 25-35 mph. Gusts around 40-50 mph are possible on exposed ground. Buffeting may affect balance on exposed ground, particularly near ridges and edges. Rain is forecast during this period.
13/100

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

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

Full overnight outlook

Open-hillside camping looks poor overall around 600 m (39/100). Open-ground gusts may reach about 40 mph. Seek meaningful shelter. Peak gusts range from about 30 mph at 300 m to 40 mph at 900 m. Roughly 23 mm is forecast overnight, with rain liable to affect both pitching and packing up. Pitches near 900 m may spend part of the night in cloud, bringing damp conditions and poor visibility while cloud is present. Condensation risk is high near 300, 600 and 900 m. Ventilation will matter.

Overnight rain23.0 mm Open ground · 600 m23 mph · gusts 35 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 8°C or lower

Moon overnight

Waning gibbous moon

Illuminated disc
98%
Moonrise
18:53 BST
Moonset
Outside this window

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

Overnight window: 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
19 mph / 29 mph
Typical / low
10.5°C / 10.2°C
In cloud
0% of modelled night
Condensation
High
600 m39/100 · poor
Wind / gust
23 mph / 35 mph
Typical / low
10.5°C / 10.2°C
In cloud
0% of modelled night
Condensation
High
900 m39/100 · poor
Wind / gust
27 mph / 41 mph
Typical / low
9.2°C / 8.8°C · much of the night
In cloud
100% of modelled night
Condensation
High

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

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

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

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

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

Full climbing & scrambling outlook

Conditions for exposed scrambling look very poor (0/100). Rain during the climbing period is likely to leave rock wet and more slippery. The mapped summit rock is Rhyolite (Unnamed Igneous Intrusion, Ordovician). Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Representative samples along available mapped routes also include Pyroclastic-rock, Basalt and 1 other mapped type, so rock character and wet-weather behaviour may change across the mountain. Gusts may reach about 45 mph. Crosswinds can make exposed ridges substantially more serious. Cloud may also make route-finding and retreat harder.

Rock surfaceWet rock likelyPeak gust46 mphRain18.2 mm
Main factorsgusts around 45 mphwet rock likelymuch of the route may be in cloud
Mapped rock across the summit and available routes Rhyolite Unnamed Igneous Intrusion, Ordovician
Origin
Igneous
Rock family
Volcanic rock
Mapping
BGS Geology 50K · 1:50,000
Rock-response profile
Low confidence
View the summit BGS record

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery. Summit-point mapping plus representative BGS bedrock samples along available GPX routes. These are not continuous geological surveys; contacts, superficial deposits and the exposed rock on individual holds may differ.

Rock groups along the sampled routes

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

Snowdon Horseshoe

volcanic rock

Snowdon Miners Track

volcanic rock

Snowdon Pyg Track

volcanic rock

Geological detail and BGS records
Mapped variation

4 rock types appear across the available route samples

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

Summit mapping Rhyolite Unnamed Igneous Intrusion, Ordovician 460–955 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Pyroclastic-rock Bedded Pyroclastic Formation 449–1,040 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Basalt Bedded Pyroclastic Formation 870–964 m samples Seen on Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record
Route sample Felsic tuff Lower Rhyolitic Tuff Formation 365–447 m samples Seen on Peak Snowdon Horseshoe, Peak Snowdon Miners Track, Peak Snowdon Pyg Track

Often grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

BGS record

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

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

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

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

After dark: aurora and stargazing

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

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

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

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

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

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

Open the questions to take part.

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

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

Forecast run: 2026-09-20

Keep exploring

Weather around Crib Goch.

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

Regional mountain forecastEryri (Snowdonia)View area →
Crib y Ddysgl1,065 m · 1.3 km awayForecast →Snowdon - Yr Wyddfa1,085 m · 1.6 km awayForecast →Y Lliwedd898 m · 1.9 km awayForecast →Glyder Fawr1,001 m · 3.3 km awayForecast →

A forecast is part of the decision.

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

Choose another summit