Mountain Weather

Beinn an Òir weather forecast.

785 m summit in Argyll and Loch Lomond. 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 weather64Mixed
Summit wind · 08:00-17:0020-30 mph easterly Summit gusts · 08:00-17:0030-40 mph Feels like-6 to -2°C PrecipitationLittle or none Cloud-free summit estimate90% Freezing levelAbove summit DaylightSunrise 07:38 · Sunset 16:35 · 9.0 hours daylight

The day on the hill

A mixed day on Beinn an Òir, with a blustery wind.

Wind

On the summit expect an easterly 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 10–20 mph. Gusts like that are strong enough to make walking into it hard work, with buffeting on ridges and edges.

Cloud and visibility

The tops are likely to stay mostly clear of cloud, though brief patches cannot be ruled out. The air should be clear, so expect far-reaching views as long as the tops stay clear.

Rain and ground

It should stay dry.

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 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 4:35pm, 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. 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 7.1 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
1.9 h
Midday
3.8 h
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 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.
60
Afternoon · 12:00–17:00 Mixed Summit winds around 20-30 mph. Gusts around 30-40 mph are possible on exposed ground.
67

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 wind: gusts of about 30 mph. 59Mixed · 600 m View detailsHide details
Night beginning Thursday 5 November 2026

Full overnight outlook

A mixed night to camp, mainly because of the wind. Gusts reach about 30 mph on open ground, so peg out well and use the guylines. Look for shelter from the east. It should stay dry. Overnight lows of about 4°C at 300 m. A 3-season bag rated to about 2°C comfort, and a warm mat, should do. Allow more if you sleep cold.

Overnight rain0.0 mm Open ground · 600 m20 mph · gusts 30 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 2°C or lower

Moon overnight

Waning crescent moon

Illuminated disc
11%
Moonrise
04:20 next morning GMT
Moonset
Outside this window

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
17 mph / 25 mph
Typical / low
4.5°C / 4.2°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m59 · mixed
Wind / gust
20 mph / 30 mph
Typical / low
4.5°C / 4.2°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate

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

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

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

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

Daytime · exposed rockClimbing & scramblingBetaGood conditions for exposed scrambling: gusts of 30–40 mph. Good76 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Good 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 quartzite, 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. 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 Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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 Beinn an Òir on Thursday 5 November 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 weather64Mixed
Summit wind · 08:00-17:0010-25 mph southeasterly Summit gusts · 08:00-17:0025-35 mph Feels like-4 to 0°C PrecipitationLittle or none Cloud-free summit estimate35% Cloud base through day600-1,100 m Freezing levelAbove summit DaylightSunrise 07:40 · Sunset 16:33 · 8.9 hours daylight

The day on the hill

A mixed day on Beinn an Òir, with cloud coming and going on the summit.

Wind

On the summit expect a south-easterly wind of 10–25 mph for most of the day, with gusts of 25–35 mph at the windiest. Lower down on the open hillside it will be more like 5–15 mph. Gusts like that will be noticeable on ridges and open tops, and you will chill quickly when you stop.

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

It should stay dry.

Warmth and kit

On the tops it will be around 2 to 6°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 4:35pm, 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. Some of the detail could still change, so have a last look at the forecast in the morning before you set off.

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 Mixed Summit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground. Summit cloud becomes more persistent later.
62
Afternoon · 12:00–17:00 Mixed Summit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground.
65

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

Overnight · 17:00–08:00Wild campingBetaA good night for a wild camp: gusts of about 15 mph. 76Good · 600 m View detailsHide details
Night beginning Friday 6 November 2026

Full overnight outlook

A good night for a wild camp. Light winds on open ground, gusting no more than about 15 mph. Dry to pitch, then a little rain by morning, so you'll likely pack up in the wet. Overnight lows of about 5°C at 300 m. A 3-season bag rated to about 2°C comfort, and a warm mat, should do. Allow more if you sleep cold.

Overnight rain0.9 mm Open ground · 600 m9 mph · gusts 16 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 2°C or lower

Moon overnight

Waning crescent moon

Illuminated disc
5%
Moonrise
05:43 next morning GMT
Moonset
Outside this window

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 m77 · promising
Wind / gust
8 mph / 14 mph
Typical / low
5.2°C / 4.8°C · several hours
In cloud
0% of modelled night
Condensation
Moderate
600 m76 · promising
Wind / gust
9 mph / 16 mph
Typical / low
5.2°C / 4.8°C · several hours
In cloud
0% of modelled night
Condensation
Moderate

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

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 & scramblingBetaFair conditions for exposed scrambling. Mixed69 View 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 25–35 mph could throw you off balance on exposed moves and ridges. Cloud on the tops may make route-finding and retreat harder. The rock around the summit is mostly quartzite, 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. 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 gust25-35 mphRain0.0 mm
Main concernmuch of the route may be in cloud
Representative rock around the summit Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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 Beinn an Òir on Friday 6 November 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: High
Overall hill weather86Excellent
Summit wind · 08:00-17:005-15 mph easterly Summit gusts · 08:00-17:0010-20 mph Feels like-2 to 2°C PrecipitationAround 2-5 mm Cloud-free summit estimate90% Freezing levelAbove summit DaylightSunrise 07:42 · Sunset 16:31 · 8.8 hours daylight

The day on the hill

A fine day on Beinn an Òir: light winds and clear tops for most of the day, though expect drizzle clearing by early afternoon.

Wind

On the summit expect light winds of up to 15 mph, mainly easterly, with gusts of 10–20 mph at the windiest.

Cloud and visibility

The tops are likely to stay mostly clear of cloud, though brief patches cannot be ruled out.

Rain and ground

Drizzle at first, clearing by early afternoon. Expect 2–5 mm in total. Most other forecast models keep it much drier than this.

Warmth and kit

On the tops it will be around 2 to 6°C, feeling like -2 to 2°C in the wind. The freezing level is above the summits. 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 9 hours of daylight. Sunset is around 4:30pm, so allow time to get off the hill before dark, and carry a head torch.

Forecast confidence

It's still two days off, 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.

Early
0 h
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 Good Summit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground. Rain is forecast during this period.
84
Afternoon · 12:00–17:00 Excellent Rain eases compared with the morning. Summit winds around 5-15 mph. Gusts around 10-20 mph are possible on exposed ground.
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 the cold: dry, with light winds. 59Mixed · 600 m View detailsHide details
Night beginning Saturday 7 November 2026

Full overnight outlook

A mixed night to camp, mainly because of the cold. Light winds on open ground, gusting no more than about 10 mph. It should stay dry. Overnight lows of about 4°C at 600 m. A 3-season bag rated to about 2°C comfort, and a warm mat, should do. Allow more if you sleep cold.

Overnight rain0.0 mm Open ground · 600 m7 mph · gusts 10 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 2°C or lower

Elevation reference (open ground)

300 m59 · mixed
Wind / gust
6 mph / 9 mph
Typical / low
4.9°C / 4.2°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate
600 m59 · mixed
Wind / gust
7 mph / 10 mph
Typical / low
4.9°C / 4.0°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate

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

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

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

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

Daytime · exposed rockClimbing & scramblingBetaMixed conditions for exposed scrambling: wet, slippery rock. Mixed51 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Mixed conditions for exposed scrambling. The rock is likely to be wet and slippery through the day. The rock around the summit is mostly quartzite, 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. 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 gust10-20 mphRain2.5 mm
Main concernwet rock likely
Representative rock around the summit Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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 Beinn an Òir on Saturday 7 November 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 weather93Excellent
Summit wind · 08:00-17:000-15 mph easterly Summit gusts · 08:00-17:005-15 mph Feels like-2 to 2°C PrecipitationLittle or none Cloud-free summit estimate85% Cloud base through day900-1,200 m Freezing levelAbove summit DaylightSunrise 07:44 · Sunset 16:29 · 8.8 hours daylight

The day on the hill

A fine day on Beinn an Òir: dry, with light winds and clear tops for most of the day.

Wind

On the summit expect light winds of up to 10 mph, mainly easterly, with gusts of 5–15 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 5am. Good spells of sunshine are likely.

Rain and ground

It should stay dry.

Warmth and kit

On the tops it will be around 2 to 6°C, feeling like -2 to 2°C in the wind. The freezing level is above the summits. Take a warm layer and a hat for the top.

Daylight

A short day, with only about 9 hours of daylight. Sunset is around 4:30pm, 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 7.5 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
1.5 h
Midday
4 h
Later
0 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
Afternoon · 12:00–17:00 Excellent Summit winds around 5-15 mph. Gusts around 5-15 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 the cold: dry, with light winds. 59Mixed · 600 m View detailsHide details
Night beginning Sunday 8 November 2026

Full overnight outlook

A mixed night to camp, mainly because of the cold. Light winds on open ground, gusting no more than about 10 mph. It should stay dry. Overnight lows of about 4°C at 600 m. A 3-season bag rated to about 2°C comfort, and a warm mat, should do. Allow more if you sleep cold.

Overnight rain0.0 mm Open ground · 600 m7 mph · gusts 12 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 2°C or lower

Elevation reference (open ground)

300 m59 · mixed
Wind / gust
6 mph / 10 mph
Typical / low
5.0°C / 4.7°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m59 · mixed
Wind / gust
7 mph / 12 mph
Typical / low
4.8°C / 4.1°C · much of the night
In cloud
0% of modelled night
Condensation
Moderate

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

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

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

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

Daytime · exposed rockClimbing & scramblingBetaGood conditions for exposed scrambling. Good84 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Good conditions for exposed scrambling. The rock should be drying, but damp patches, shaded holds and drainage lines may still be wet. The rock around the summit is mostly quartzite, 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. 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 gust5-15 mphRain0.0 mm
Main concerndamp or incompletely dried rock possible
Representative rock around the summit Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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 Beinn an Òir on Sunday 8 November 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 weather92Excellent
Summit wind · 08:00-17:0010-20 mph southeasterly Summit gusts · 08:00-17:0015-25 mph Feels like-4 to 0°C PrecipitationLittle or none Cloud-free summit estimate90% Cloud base through day700-1,200 m Freezing level600-900 m DaylightSunrise 07:46 · Sunset 16:27 · 8.7 hours daylight

The day on the hill

A fine day on Beinn an Òir: dry, with light winds and clear tops for most of the day.

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

The tops are likely to stay mostly clear of cloud, though brief patches cannot be ruled out.

Rain and ground

It should stay dry.

Warmth and kit

On the tops it will be around 2 to 6°C, feeling like -4 to 0°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 4:25pm, 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 7.5 h of sunshine. This is not a forecast of time in sunshine on the summit. Use the cloud and views outlook above for the conditions on this mountain.

Early
1.5 h
Midday
4 h
Later
0 h

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

Morning · 08:00–12:00 Excellent Summit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground. Summit cloud is more persistent early in this period, with better prospects later.
89
Afternoon · 12:00–17:00 Excellent Summit winds around 10-20 mph. Gusts around 15-25 mph are possible on exposed ground.
94

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 cold: dry, with light winds. 59Mixed · 600 m View detailsHide details
Night beginning Monday 9 November 2026

Full overnight outlook

A mixed night to camp, mainly because of the cold. Light winds on open ground, gusting no more than about 20 mph. It should stay dry. Overnight lows of about 3°C at 600 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.

Overnight rain0.0 mm Open ground · 600 m13 mph · gusts 19 mph Morning pack-upNo wet signal Sleeping-bag warmthISO comfort rating about 0°C or lower

Elevation reference (open ground)

300 m59 · mixed
Wind / gust
11 mph / 16 mph
Typical / low
4.6°C / 4.1°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m59 · mixed
Wind / gust
13 mph / 19 mph
Typical / low
4.0°C / 3.3°C · much of the night
In cloud
0% of modelled night
Condensation
Low

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.

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 & scramblingBetaExcellent conditions for exposed scrambling. Excellent95 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Excellent 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 quartzite, 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. 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
Representative rock around the summit Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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 Beinn an Òir on Monday 9 November 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 weather71Good
Summit wind · 08:00-17:0015-25 mph southeasterly Summit gusts · 08:00-17:0025-35 mph Feels like-10 to -6°C PrecipitationUp to around 2 mm Cloud-free summit estimate85% Freezing level600-900 m DaylightSunrise 07:48 · Sunset 16:26 · 8.6 hours daylight

The day on the hill

A good day on Beinn an Òir: breezy, with clear tops for most of the day.

Wind

On the summit expect a south-easterly wind of 15–25 mph for most of the day, with gusts of 25–35 mph at the windiest. Lower down on the open hillside the wind will be light, under 10 mph. Gusts like that will be noticeable on ridges and open tops, and you will chill quickly when you stop.

Cloud and visibility

The tops are likely to stay mostly clear of cloud, though brief patches cannot be ruled out.

Rain and ground

Dry through the daylight hours, but rain arrives after dark. Some forecast models keep it drier in the afternoon.

Warmth and kit

On the tops it will be around -2 to 2°C, feeling like -10 to -6°C in the wind. It turns milder through the day. 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 4:25pm, 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 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 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.

Early
2 h
Midday
4 h
Later
0 h

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

Morning · 08:00–12:00 Good Summit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground.
74
Afternoon · 12:00–17:00 Mixed Summit winds around 15-25 mph. Gusts around 25-35 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.
68

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: about 4 mm of rain. 59Mixed · 600 m View detailsHide details
Night beginning Tuesday 10 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 20 mph. The wind swings from southeasterly to northeasterly overnight, so a pitch sheltered at dusk may not be by morning. Expect about 4 mm of rain, mostly early on, so you'll likely pitch in the rain. Overnight lows of about 5°C at 600 m. A 3-season bag rated to about 2°C comfort, and a warm mat, should do. Allow more if you sleep cold.

Overnight rain4.3 mm Open ground · 600 m10 mph · gusts 20 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about 2°C or lower

Elevation reference (open ground)

300 m59 · mixed
Wind / gust
9 mph / 17 mph
Typical / low
5.0°C / 4.7°C · several hours
In cloud
0% of modelled night
Condensation
High
600 m59 · mixed
Wind / gust
10 mph / 20 mph
Typical / low
4.8°C / 4.6°C · much of the night
In cloud
13% 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.

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 & scramblingBetaVery poor conditions for exposed scrambling: wet, slippery rock. Poor3 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Very poor conditions for exposed scrambling. The rock is likely to be wet and slippery through the day. Icy patches are likely on the rock, which makes it treacherous without winter kit. Gusts of 25–35 mph could throw you off balance on exposed moves and ridges. The rock around the summit is mostly quartzite, 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. 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 gust25-35 mphRain0.8 mm
Main factorswet rock likelySub-zero temperatures and moisture may leave icy patches on exposed rock
Representative rock around the summit Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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 Beinn an Òir on Tuesday 10 November 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 weather88Excellent
Summit wind · 08:00-17:0015-25 mph northeasterly Summit gusts · 08:00-17:0020-30 mph Feels like-6 to -2°C PrecipitationLittle or none Cloud-free summit estimate90% Freezing levelAbove summit DaylightSunrise 07:50 · Sunset 16:24 · 8.6 hours daylight

The day on the hill

A fine day on Beinn an Òir: dry, with light winds and clear tops for most of the day.

Wind

On the summit expect a north-easterly wind of 15–25 mph for most of the day, with gusts of 20–30 mph at the windiest. Lower down on the open hillside it will be more like 5–15 mph.

Cloud and visibility

The tops are likely to stay mostly clear of cloud, though brief patches cannot be ruled out. The air should be clear, so expect far-reaching views as long as the tops stay clear.

Rain and ground

It should stay dry.

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 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 4:25pm, 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 1.8 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.

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 Excellent Summit winds around 15-25 mph. Gusts around 20-30 mph are possible on exposed ground.
89
Afternoon · 12:00–17:00 Excellent Summit winds around 15-25 mph. Gusts around 20-30 mph are possible on exposed ground.
87

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 cold: a frost, down to -1°C. 59Mixed · 600 m View detailsHide details
Night beginning Wednesday 11 November 2026

Full overnight outlook

A mixed night to camp, mainly because of the cold. Gusts reach about 25 mph on open ground, so peg out well and use the guylines. Look for shelter from the northeast. It should stay dry. A frost at every height we checked (300-600 m), down to about -1°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.

Overnight rain0.0 mm Open ground · 600 m16 mph · gusts 26 mph Morning pack-upNo wet signal Sleeping-bag warmthISO comfort rating about -4°C or lower

Elevation reference (open ground)

300 m59 · mixed
Wind / gust
14 mph / 22 mph
Typical / low
1.3°C / -0.7°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m59 · mixed
Wind / gust
16 mph / 26 mph
Typical / low
1.1°C / -0.7°C · much of the night
In cloud
0% of modelled night
Condensation
Low

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.

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 & scramblingBetaGood conditions for exposed scrambling. Good76 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Good conditions for exposed scrambling. The rock should be drying, but damp patches, shaded holds and drainage lines may still be wet. Gusts of 20–30 mph will be noticeable on exposed ridges. The rock around the summit is mostly quartzite, 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. 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 concerndamp or incompletely dried rock possible
Representative rock around the summit Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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 Beinn an Òir on Wednesday 11 November 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 weather80Good
Summit wind · 08:00-17:0015-25 mph northerly Summit gusts · 08:00-17:0025-35 mph Feels like-10 to -6°C PrecipitationLittle or none Cloud-free summit estimate90% Freezing level400-700 m DaylightSunrise 07:53 · Sunset 16:22 · 8.5 hours daylight

The day on the hill

A good day on Beinn an Òir: dry and breezy, with clear tops for most of the day.

Wind

On the summit expect a northerly wind of 15–25 mph for most of the day, with gusts of 25–35 mph at the windiest. Lower down on the open hillside it will be more like 5–15 mph. Gusts like that will be noticeable on ridges and open tops, and you will chill quickly when you stop.

Cloud and visibility

The tops are likely to stay mostly clear of cloud, though brief patches cannot be ruled out. The air should be clear, so expect far-reaching views as long as the tops stay clear.

Rain and ground

It should stay dry.

Warmth and kit

On the tops it will be around -2 to 2°C, feeling like -10 to -6°C in the wind. The freezing level is around 500–800 m, so it will be below freezing on the tops. 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 4:20pm, 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.

Early
2 h
Midday
4 h
Later
0 h

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

Morning · 08:00–12:00 Good Summit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground.
79
Afternoon · 12:00–17:00 Good Summit winds around 15-25 mph. Gusts around 25-35 mph are possible on exposed ground.
80

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: a frost, down to -2°C. 39Poor · 600 m View detailsHide details
Night beginning Thursday 12 November 2026

Full overnight outlook

A poor night to camp on open ground. Gusts reach about 30 mph on open ground, so peg out well and use the guylines. Look for shelter from the north. Expect some light rain, with rain while you pitch and still falling when you pack up. A frost at every height we checked (300-600 m), down to about -2°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.

Overnight rain2.4 mm Open ground · 600 m20 mph · gusts 30 mph Morning pack-upDampness possible Sleeping-bag warmthISO comfort rating about -4°C or lower

Moon overnight

Waxing crescent moon

Illuminated disc
13%
Moonrise
Outside this window
Moonset
17:26 GMT

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
16 mph / 23 mph
Typical / low
-1.3°C / -1.9°C · much of the night
In cloud
0% of modelled night
Condensation
Low
600 m39 · poor
Wind / gust
20 mph / 30 mph
Typical / low
-1.3°C / -1.9°C · much of the night
In cloud
0% of modelled night
Condensation
Low

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.

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.

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Daytime · exposed rockClimbing & scramblingBetaPoor conditions for exposed scrambling. Poor35 View detailsHide details
Generic exposed-rock guidance

Full climbing & scrambling outlook

Poor conditions for exposed scrambling. The rock should be mostly dry, though drainage lines and shaded holds may still be damp. Snow is likely on the rock and ledges, so it becomes a winter route. Gusts of 25–35 mph could throw you off balance on exposed moves and ridges. The rock around the summit is mostly quartzite, 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. 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 gust25-35 mphRain0.1 mm
Main concernSnow may fall on high ground. Deposits could make summer scrambling conditions inappropriate
Representative rock around the summit Quartzite Jura Quartzite Formation
Origin
Metamorphic
Broad rock-response group
Quartzite
Mapping
BGS Geology 50K · 1:50,000
Summit area
Quartzite in 82% of 17 BGS samples within 350 m
Rock-response profile
Moderate confidence
View the summit BGS record

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. 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.

Geological detail and BGS records
Mapped variation

2 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 Quartzite Jura Quartzite Formation

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.

BGS record
Summit-area sample Olivine-microgabbro North Britain Palaeogene Dyke Suite

Dolerite is a hard, dark, fine-grained rock. It grips well when dry and is fair when wet. It is usually solid, but it often breaks into blocky columns, so check blocks before you pull on them.

BGS record

Generic exposed scrambling terrain; BGS summit-area bedrock samples are 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.

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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.

Explore the dedicated aurora forecast, meteor shower forecast or dark-sky and astrophotography forecast.

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

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

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

This is about Beinn an Òir on Thursday 12 November 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

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

Forecast run: 2026-11-05

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.

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