958 m summit in Angus Glens. 8 forecast days covering wind, cloud, rain and temperature, updated 5 November 2026 at 16:25 UTC.
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Confidence: Medium
Overall hill weather66Mixed
Summit wind · 08:00-17:005-15 mph easterlySummit gusts · 08:00-17:0015-25 mphFeels like-6 to -2°CPrecipitationLittle or noneCloud-free summit estimate10%Cloud base through day700-1,000 mFreezing levelAbove summitDaylightSunrise 07:31 · Sunset 16:21 · 8.8 hours daylight
The day on the hill
A mixed day on Tolmount, with the summit in cloud for most of the day.
Wind
On the summit expect light winds of up to 15 mph, mainly easterly, with gusts of 15–25 mph at the windiest. Lower down on the open hillside the wind will be light, under 10 mph.
Cloud and visibility
Expect the summit to be in cloud for most of the day. The cloud base could be as low as 600–900 m in the early afternoon. In cloud you'll be finding your way without landmarks, so carry navigation you trust and know how to use, with a backup such as a spare battery or a map and compass.
Rain and ground
It should stay dry.
Warmth and kit
On the tops it will be around -2 to 2°C, feeling like -6 to -2°C in the wind. The freezing level is above the summits. Take a hat, gloves, a windproof and a spare warm layer.
Daylight
A short day, with only about 9 hours of daylight. Sunset is around 4:20pm, so allow time to get off the hill before dark, and carry a head torch.
Forecast confidence
Cloud height is hard to pin down, so the summit could be in or out of cloud at short notice. Things could still change through the day, so keep an eye on the sky.
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.
Morning · 08:00–12:00
MixedSummit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground.
66
Afternoon · 12:00–17:00
MixedSummit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground.
66
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaA mixed night to camp, mainly because of the rain: gusts of about 25 mph.59Mixed · 600 mView detailsHide details
Night beginning Thursday 5 November 2026
Full overnight outlook
A mixed night to camp, mainly because of the rain. Light winds on open ground, gusting no more than about 25 mph. Dry to pitch, then some light rain overnight, easing by morning, though the tent may still be wet. Up around 900 m you'd likely be in cloud for part of the night: damp, and hard to find your way if you need to move. The air is damp at every height we checked (300-900 m), so expect heavy condensation. Leave the vents open. A cold night, down to about 2°C around 900 m. A warm 3-season or 3–4 season bag rated to about 0°C comfort, and a warm mat, should do. Allow more if you sleep cold.
Extensive cloud may limit moonlight. Illumination describes the sunlit part of the Moon, not brightness at your pitch.
Overnight window: 5 Nov, 17:00 GMT to 6 Nov, 08:00 GMT. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.
Elevation reference (open ground)
300 m59 · mixed
Wind / gust
10 mph / 16 mph
Typical / low
4.1°C / 3.5°C · much of the night
In cloud
0% of modelled night
Condensation
High
600 m59 · mixed
Wind / gust
12 mph / 20 mph
Typical / low
4.1°C / 3.5°C · much of the night
In cloud
0% of modelled night
Condensation
High
900 m50 · mixed
Wind / gust
14 mph / 23 mph
Typical / low
2.5°C / 2.1°C · much of the night
In cloud
100% of modelled night
Condensation
High
Warmth planning: As a broad starting point, consider a warm 3-season or 3–4 season bag with an ISO/EN comfort rating at or below about 0°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.
Fair conditions for exposed scrambling. The rock should be mostly dry, though drainage lines and shaded holds may still be damp. Cloud on the tops may make route-finding and retreat harder. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceProbably dryPeak gust15-25 mphRain0.0 mm
Main concernmuch of the route may be in cloud
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Thursday 5 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Summit wind · 08:00-17:005-20 mph southeasterlySummit gusts · 08:00-17:0020-30 mphFeels like-4 to 0°CPrecipitationUp to around 2 mmCloud-free summit estimate10%Cloud base through day600-900 mFreezing levelAbove summitDaylightSunrise 07:33 · Sunset 16:19 · 8.8 hours daylight
The day on the hill
A mixed day on Tolmount, with the summit in cloud for most of the day.
Wind
On the summit expect a south-easterly wind of 5–20 mph for most of the day, with gusts of 20–30 mph at the windiest. Lower down on the open hillside the wind will be light, under 10 mph.
Cloud and visibility
Expect the summit to be in cloud for most of the day. The cloud base could be as low as 600–900 m mid-afternoon. In cloud you'll be finding your way without landmarks, so carry navigation you trust and know how to use, with a backup such as a spare battery or a map and compass.
Rain and ground
Drizzle for much of the day.
Warmth and kit
On the tops it will be around 0 to 4°C, feeling like -4 to 0°C in the wind. The freezing level is above the summits. Take a hat, gloves, a windproof and a spare warm layer.
Daylight
A short day, with only about 9 hours of daylight. Sunset is around 4:20pm, so allow time to get off the hill before dark, and carry a head torch.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 0 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.
Morning · 08:00–12:00
MixedSummit winds around 10-20 mph. Gusts around 20-30 mph are possible on exposed ground. Rain is forecast during this period.
64
Afternoon · 12:00–17:00
MixedSummit winds around 5-15 mph. Gusts around 15-25 mph are possible on exposed ground. Rain is forecast during this period.
64
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaA mixed night to camp, mainly because of damp air: dry, with light winds.59Mixed · 600 mView detailsHide details
Night beginning Friday 6 November 2026
Full overnight outlook
A mixed night to camp, mainly because of damp air. Light winds on open ground, gusting no more than about 15 mph. It should stay dry. Up around 900 m you'd likely be in cloud for part of the night: damp, and hard to find your way if you need to move. The air is damp at every height we checked (300-900 m), so expect heavy condensation. Leave the vents open. A cold night, down to about 2°C around 900 m. A 3-season bag rated to about 2°C comfort, and a warm mat, should do. Allow more if you sleep cold.
Cloud may affect views of the Moon. Illumination describes the sunlit part of the Moon, not brightness at your pitch.
Overnight window: 6 Nov, 17:00 GMT to 7 Nov, 08:00 GMT. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.
Elevation reference (open ground)
300 m59 · mixed
Wind / gust
6 mph / 11 mph
Typical / low
4.6°C / 4.2°C · much of the night
In cloud
0% of modelled night
Condensation
High
600 m59 · mixed
Wind / gust
7 mph / 13 mph
Typical / low
4.6°C / 4.2°C · much of the night
In cloud
0% of modelled night
Condensation
High
900 m59 · mixed
Wind / gust
9 mph / 15 mph
Typical / low
2.6°C / 2.2°C · much of the night
In cloud
27% of modelled night
Condensation
High
Warmth planning: As a broad starting point, consider a 3-season bag with an ISO/EN comfort rating at or below about 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.
Mixed conditions for exposed scrambling. The rock is likely to be wet and slippery through the day. Gusts of 20–30 mph will be noticeable on exposed ridges. Cloud on the tops may make route-finding and retreat harder. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceWet rock likelyPeak gust20-30 mphRain0.9 mm
Main factorswet rock likelymuch of the route may be in cloud
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Friday 6 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Summit wind · 08:00-17:000-15 mph southeasterlySummit gusts · 08:00-17:0010-20 mphFeels like-4 to 0°CPrecipitationLittle or noneCloud-free summit estimate40%Cloud base through day600-1,300 mFreezing levelAbove summitDaylightSunrise 07:35 · Sunset 16:17 · 8.7 hours daylight
The day on the hill
A good day on Tolmount, though expect cloud coming and going on the summit.
Wind
On the summit expect light winds of up to 15 mph, mainly south-easterly, with gusts of 10–20 mph at the windiest.
Cloud and visibility
The tops are likely to drift in and out of cloud, with the best chance of a clear summit mid-morning. The cloud base could be as low as 600–900 m mid-morning. In cloud you'll be finding your way without landmarks, so carry navigation you trust and know how to use, with a backup such as a spare battery or a map and compass.
Rain and ground
It should stay dry.
Warmth and kit
On the tops it will be around 0 to 4°C, feeling like -4 to 0°C in the wind. The freezing level is above the summits. Take a hat, gloves, a windproof and a spare warm layer.
Daylight
A short day, with only about 9 hours of daylight. Sunset is around 4:15pm, so allow time to get off the hill before dark, and carry a head torch.
Forecast confidence
Cloud height is hard to pin down, so the summit could be in or out of cloud at short notice. It's still two days off and could change, so check again nearer the time.
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
ExcellentSummit 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.
86
Afternoon · 12:00–17:00
GoodSummit winds around 0-10 mph. Gusts around 5-15 mph are possible on exposed ground. Summit cloud becomes more persistent later.
75
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaA mixed night to camp, mainly because of damp air: dry, with light winds.59Mixed · 600 mView detailsHide details
Night beginning Saturday 7 November 2026
Full overnight outlook
A mixed night to camp, mainly because of damp air. Light winds on open ground, gusting no more than about 15 mph. It should stay dry. Above about 600 m you'd likely be in cloud for part of the night: damp, and hard to find your way if you need to move. The air is damp at every height we checked (300-900 m), so expect heavy condensation. Leave the vents open. A cold night, down to about 2°C around 900 m. A 3-season bag rated to about 2°C comfort, and a warm mat, should do. Allow more if you sleep cold.
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.
Good conditions for exposed scrambling. The rock should be mostly dry, though drainage lines and shaded holds may still be damp. Cloud on the tops may make route-finding and retreat harder. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceProbably dryPeak gust10-20 mphRain0.1 mm
Main concernmuch of the route may be in cloud
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Saturday 7 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Summit wind · 08:00-17:000-10 mph northeasterlySummit gusts · 08:00-17:005-15 mphFeels like-4 to 0°CPrecipitationLittle or noneCloud-free summit estimate40%Cloud base through day500-1,400 mFreezing levelAbove summitDaylightSunrise 07:37 · Sunset 16:14 · 8.6 hours daylight
The day on the hill
A good day on Tolmount, though expect cloud on the tops early.
Wind
On the summit expect light winds of up to 10 mph, mainly north-easterly, with gusts of 5–15 mph at the windiest.
Cloud and visibility
Cloud on the tops early should lift off them by midday. The cloud base could be as low as 500–800 m early in the morning. In cloud you'll be finding your way without landmarks, so carry navigation you trust and know how to use, with a backup such as a spare battery or a map and compass. Mist or fog is possible in the valleys early on, clearing by about 8am.
Rain and ground
It should stay dry.
Warmth and kit
On the tops it will be around 0 to 4°C, feeling like -4 to 0°C in the wind. The freezing level is above the summits. Take a hat, gloves, a windproof and a spare warm layer.
Daylight
A short day, with only about 9 hours of daylight. Sunset is around 4:15pm, so allow time to get off the hill before dark, and carry a head torch.
Forecast confidence
Cloud height is hard to pin down, so the summit could be in or out of cloud at short notice. It's still three days off and could change, so check again nearer the time.
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.
Morning · 08:00–12:00
MixedSummit winds around 0-10 mph. Gusts around 5-15 mph are possible on exposed ground.
66
Afternoon · 12:00–17:00
ExcellentSummit winds around 0-10 mph. Gusts around 0-10 mph are possible on exposed ground. Summit cloud is more persistent early in this period, with better prospects later.
89
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaA mixed night to camp, mainly because of damp air: dry, with light winds.54Mixed · 600 mView detailsHide details
Night beginning Sunday 8 November 2026
Full overnight outlook
A mixed night to camp, mainly because of damp air. Light winds on open ground, gusting no more than about 15 mph. It should stay dry. Above about 600 m you'd likely be in cloud for part of the night: damp, and hard to find your way if you need to move. The air is damp at every height we checked (300-900 m), so expect heavy condensation. Leave the vents open. A cold night, down to about 1°C around 900 m. A warm 3-season or 3–4 season bag rated to about 0°C comfort, and a warm mat, should do. Allow more if you sleep cold.
Warmth planning: As a broad starting point, consider a warm 3-season or 3–4 season bag with an ISO/EN comfort rating at or below about 0°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.
Fair conditions for exposed scrambling. The rock should be mostly dry, though drainage lines and shaded holds may still be damp. Cloud on the tops may make route-finding and retreat harder. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceProbably dryPeak gust5-15 mphRain0.0 mm
Main concernmuch of the route may be in cloud
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Sunday 8 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Summit wind · 08:00-17:005-15 mph southeasterlySummit gusts · 08:00-17:0010-20 mphFeels like-6 to -2°CPrecipitationLittle or noneCloud-free summit estimate80%Cloud base through day1,000-1,300 mFreezing level900-1,200 mDaylightSunrise 07:40 · Sunset 16:12 · 8.6 hours daylight
The day on the hill
A good day on Tolmount: dry, with light winds and clear tops for most of the day.
Wind
On the summit expect light winds of up to 15 mph, mainly south-easterly, with gusts of 10–20 mph at the windiest.
Cloud and visibility
The tops should stay mostly clear of cloud. A few forecast models bring the cloud base down to around 500–800 m at times. The cloud base sits close to summit height, so the top could go in and out of cloud at short notice. Mist or fog is possible in the valleys early on, clearing by about 10am.
Rain and ground
It should stay dry.
Warmth and kit
On the tops it will be around -2 to 2°C, feeling like -6 to -2°C in the wind. The freezing level is close to summit height. Take a hat, gloves, a windproof and a spare warm layer.
Daylight
A short day, with only about 9 hours of daylight. Sunset is around 4:10pm, so allow time to get off the hill before dark, and carry a head torch.
Forecast confidence
Cloud heights are particularly hard to pin down today. It's still four days off and could change, so check again nearer the time.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 3 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.
Morning · 08:00–12:00
GoodSummit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground.
76
Afternoon · 12:00–17:00
ExcellentSummit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground.
93
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaA mixed night to camp, mainly because of damp air: dry, with light winds.59Mixed · 600 mView detailsHide details
Night beginning Monday 9 November 2026
Full overnight outlook
A mixed night to camp, mainly because of damp air. Light winds on open ground, gusting no more than about 20 mph. It should stay dry. The air is damp at every height we checked (300-900 m), so expect heavy condensation. Leave the vents open. A cold night, down to about 1°C around 900 m. A warm 3-season or 3–4 season bag rated to about 0°C comfort, and a warm mat, should do. Allow more if you sleep cold.
Warmth planning: As a broad starting point, consider a warm 3-season or 3–4 season bag with an ISO/EN comfort rating at or below about 0°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.
Good conditions for exposed scrambling. The rock should be mostly dry, though drainage lines and shaded holds may still be damp. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceProbably dryPeak gust10-20 mphRain0.0 mm
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Monday 9 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Summit wind · 08:00-17:0010-20 mph southeasterlySummit gusts · 08:00-17:0015-25 mphFeels like-6 to -2°CPrecipitationUp to around 2 mmCloud-free summit estimate30%Cloud base through day500-1,100 mFreezing level900-1,200 mDaylightSunrise 07:42 · Sunset 16:10 · 8.5 hours daylight
The day on the hill
A mixed day on Tolmount, with sleet or snow on the tops and cloud coming and going on the summit.
Snow and navigation
Sleet or snow is possible on the tops in the morning, with small temperature changes affecting the mix. The air freezing level is roughly 1000 to 1100 m above sea level. Snow can fall below this, but its lower limit is uncertain.
Wind
On the summit expect a south-easterly wind of 10–20 mph for most of the day, with gusts of 15–25 mph at the windiest. Lower down on the open hillside the wind will be light, under 10 mph.
Cloud and visibility
Expect the summit to be in cloud for most of the day. The cloud base could be as low as 500–800 m mid-morning. In cloud you'll be finding your way without landmarks, so carry navigation you trust and know how to use, with a backup such as a spare battery or a map and compass. Mist or fog is possible in the valleys early on, clearing by about 7am. Any sunshine is more likely on lower ground than on the summit.
Rain and ground
Sleet is possible on the tops, and it could turn to snow if it is a little colder. Drizzle sets in around midday. Expect up to 2 mm in total, measured as melted water, so any snow would lie deeper. Some forecast models keep it drier in the afternoon.
Warmth and kit
On the tops it will be around 0 to 4°C, feeling like -6 to -2°C in the wind. The freezing level is close to summit height. Take a hat, gloves, a windproof and a spare warm layer. Pack waterproofs too, and keep a warm layer dry in your pack.
Daylight
A short day, with only about 8 hours of daylight. Sunset is around 4:10pm, so allow time to get off the hill before dark, and carry a head torch.
Forecast confidence
There is some disagreement between forecast models on wind strength. It's still five days off and could change, so check again nearer the time.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 6.3 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.
Morning · 08:00–12:00
MixedSummit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground. Rain is forecast during this period.
58
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. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
55
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaA mixed night to camp, mainly because of the rain: gusts of about 25 mph.59Mixed · 600 mView detailsHide details
Night beginning Tuesday 10 November 2026
Full overnight outlook
A mixed night to camp, mainly because of the rain. Gusts reach about 25 mph on open ground, so peg out well and use the guylines. Look for shelter from the southeast. The wind swings from southeasterly to northerly overnight, so a pitch sheltered at dusk may not be by morning. Dry to pitch, then some light rain overnight and into the morning, so expect to pack a wet tent. Above about 600 m you'd likely be in cloud for part of the night: damp, and hard to find your way if you need to move. A cold night, down to about 1°C around 900 m. A warm 3-season or 3–4 season bag rated to about 0°C comfort, and a warm mat, should do. Allow more if you sleep cold.
Warmth planning: As a broad starting point, consider a warm 3-season or 3–4 season bag with an ISO/EN comfort rating at or below about 0°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.
Poor conditions for exposed scrambling. The rock is likely to be wet and slippery through the day. Cloud on the tops may make route-finding and retreat harder. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceWet rock likelyPeak gust15-25 mphRain1.5 mm
Main factorswet rock likelymuch of the route may be in cloud
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Tuesday 10 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Summit wind · 08:00-17:0010-25 mph northerlySummit gusts · 08:00-17:0020-30 mphFeels like-10 to -6°CPrecipitationLittle or noneCloud-free summit estimate60%Cloud base through day1,100-1,600 mFreezing level600-900 mDaylightSunrise 07:44 · Sunset 16:08 · 8.4 hours daylight
The day on the hill
A good day on Tolmount: dry and breezy.
Wind
On the summit expect a northerly wind of 10–25 mph for most of the day, with gusts of 20–30 mph at the windiest. Lower down on the open hillside the wind will be light, under 10 mph. A wind like that will be noticeable on ridges and open tops, and you will chill quickly when you stop. It gets windier still after dark, with summit gusts of 30–40 mph, so bear that in mind if you will be out late.
Cloud and visibility
The tops are likely to drift in and out of cloud, with the best chance of a clear summit around midday. The cloud base could be as low as 400–700 m early in the morning. Good spells of sunshine are likely.
Rain and ground
It should stay dry.
Warmth and kit
On the tops it will be around -4 to 0°C, feeling like -10 to -6°C in the wind. The freezing level falls through the day, to around 900–1200 m by early afternoon. Take a hat, gloves, a windproof and a spare warm layer.
Daylight
A short day, with only about 8 hours of daylight. Sunset is around 4:10pm, so allow time to get off the hill before dark, and carry a head torch.
Forecast confidence
It's still six days off and could change, so check again nearer the time.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 8 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.
Morning · 08:00–12:00
GoodSummit winds around 10-20 mph. Gusts around 20-30 mph are possible on exposed ground. Summit cloud becomes more persistent later.
70
Afternoon · 12:00–17:00
ExcellentSummit winds around 15-25 mph. Gusts around 20-30 mph are possible on exposed ground.
86
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaA poor night to camp on open ground: gusts of about 35 mph and a frost, down to -3°C.39Poor · 600 mView detailsHide details
Night beginning Wednesday 11 November 2026
Full overnight outlook
A poor night to camp on open ground. Gusts reach about 35 mph around 900 m and nearer 25 mph around 300 m, which makes for a noisy, testing night even in a good tent. Look for shelter from the north. It should stay dry. A frost at every height we checked (300-900 m), down to about -3°C. A warm 3-season or 3–4 season bag rated to about -4°C comfort, and a warm mat, should do. Allow more if you sleep cold.
Warmth planning: As a broad starting point, consider a warm 3-season or 3–4 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.
Poor conditions for exposed scrambling. The rock should be drying, but damp patches, shaded holds and drainage lines may still be wet. Icy patches are likely on the rock, which makes it treacherous without winter kit. Gusts of 20–30 mph will be noticeable on exposed ridges. Cloud on the tops may make route-finding and retreat harder. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceDamp or dryingPeak gust20-30 mphRain0.0 mm
Main factorsdamp or incompletely dried rock possibleSub-zero temperatures and moisture may leave icy patches on exposed rock
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Wednesday 11 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Dry on Tolmount, with a bitter wind chill and a blustery wind. Cloud could cover the tops and limit the views.
Wind
On the summit expect a northerly wind of 20–30 mph for most of the day, with gusts of 30–40 mph at the windiest. Lower down on the open hillside it will be more like 5–15 mph. Gusts like that are strong enough to make walking into it hard work, with buffeting on ridges and edges. If the windier forecast models are right, summit gusts could reach 50–60 mph.
Cloud and visibility
Clear spells are possible, but cloud could cover the tops for part of the day. Forecast models differ on how much summit cloud develops.
Rain and ground
It should stay dry.
Warmth and kit
On the tops it will be around -6 to -2°C, feeling like -14 to -10°C in the wind. The freezing level is around 400–700 m, so it will be below freezing on the tops. Hat, gloves and a warm insulated layer are essential, with extra warmth for stops.
Daylight
A short day, with only about 8 hours of daylight. Sunset is around 4:05pm, so allow time to get off the hill before dark, and carry a head torch.
Forecast confidence
It's still seven days off and could change, so check again nearer the time.
Sunshine context Model-grid estimate, not summit sunshine
The surrounding model grid indicates 8 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.
Morning · 08:00–12:00
GoodSummit winds around 20-30 mph. Gusts around 30-40 mph are possible on exposed ground.
70
Afternoon · 12:00–17:00
MixedSummit winds around 20-30 mph. Gusts around 30-40 mph are possible on exposed ground. Gusts this strong can make walking into it hard work, with buffeting on ridges and edges.
67
Compare an early start with later conditions. The main forecast above covers the day in more detail.
Overnight · 17:00–08:00Wild campingBetaToo windy for an exposed pitch above about 600 m (gusts of about 50 mph and a frost, down to -4°C). Lower down, a poor night to camp on open ground.19Poor · 600 mView detailsHide details
Night beginning Thursday 12 November 2026
Full overnight outlook
Too windy for an exposed pitch above about 600 m. Lower down, a poor night to camp on open ground. Gusts reach about 50 mph around 900 m and nearer 35 mph around 300 m, enough to damage a tent on open ground. Pitch low down and in real shelter, or leave it for another night. It should stay dry. A frost at every height we checked (300-900 m), down to about -4°C. A 4-season bag rated to about -6°C comfort, and a warm mat, should do. Allow more if you sleep cold.
Clear spells may allow a view of the Moon. Illumination describes the sunlit part of the Moon, not brightness at your pitch.
Overnight window: 12 Nov, 17:00 GMT to 13 Nov, 08:00 GMT. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.
Elevation reference (open ground)
300 m39 · poor
Wind / gust
23 mph / 34 mph
Typical / low
-2.3°C / -2.5°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m19 · very poor
Wind / gust
28 mph / 41 mph
Typical / low
-2.3°C / -2.5°C · much of the night
In cloud
0% of modelled night
Condensation
Low
900 m9 · very poor
Wind / gust
33 mph / 48 mph
Typical / low
-3.9°C / -4.3°C · much of the night
In cloud
0% of modelled night
Condensation
Low
Warmth planning: As a broad starting point, consider a 4-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 & scramblingBetaFair conditions for exposed scrambling: gusts of 30–40 mph.Mixed62View detailsHide details
Generic exposed-rock guidance
Full climbing & scrambling outlook
Fair conditions for exposed scrambling. The rock should be mostly dry, though drainage lines and shaded holds may still be damp. Gusts of 30–40 mph could throw you off balance on exposed moves and ridges. The rock around the summit is mostly gneiss, a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. On the usual routes up you may also cross diorite, which grips well when dry and is fair when wet. These are general notes for each rock type, taken from geological maps around the summit, so the rock on your line may differ.
Rock surfaceProbably dryPeak gust30-40 mphRain0.0 mm
Main concerngusts of 30–40 mph
Representative rock around the summit and along available routes
Gneissose semipeliteCorrydon Psammite Member
Origin
Metamorphic
Broad rock-response group
Psammite, pelite or semipelite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Psammite, pelite or semipelite in 71% of 17 BGS samples within 350 m
Summit pin
Diorite (North Britain Siluro-Devonian Calc-Alkaline Dyke Suite)
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid. These are general notes for each rock type, from geological map samples at and around the summit. The rock on your line can differ, and lichen, vegetation and seepage all change how it feels underfoot.
Rock groups along the sampled routes
These are mapped rock groups, not separate weather forecasts or a ranking of route safety.
Tolmount and Tom Buidhe
psammite, pelite or semipelite, granite, gneiss or gabbro, quartzite
Geological detail and BGS records
Mapped variation
4 rock types appear in the mapped samples
Samples around the summit inform the main rock-response profile, with the summit pin shown separately where it differs. Route samples add further context, but this is not a continuous geological survey.
Summit-area sample
Gneissose semipeliteCorrydon Psammite Member601–907 m samplesSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
Amphibolite and hornblende schistFarragon Volcanic FormationAround 523 mSeen on Tolmount and Tom Buidhe
Gneiss is a very old, hard, banded rock. It grips very well when dry and stays reasonably grippy when wet. It is usually very solid.
BGS record →
Summit-area sample
DioriteNorth Britain Siluro-Devonian Calc-Alkaline Dyke SuiteAround 836 mSeen on Tolmount and Tom Buidhe
Diorite is a hard, crystalline rock. It grips well when dry and is fair when wet. It is generally solid, though cracked into blocks along its joints.
BGS record →
Route sample
QuartziteCarn Dubh Quartzite MemberAround 984 mSeen on Tolmount and Tom Buidhe
Quartzite is a very hard rock made almost entirely of quartz. It grips well when dry and is notoriously slippery when wet. It splits into sharp, angular blocks, so expect loose scree and boulder fields, and edges that can cut gloves and hands.
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 Tolmount on Thursday 12 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.
Tolmount is one of Scotland’s 282 Munros. Munro Planner compares all 282 by forecast, summit views and drive time, with walking routes, times and OS map references for each hill.
