Cùl Mòr weather forecast.

849 m summit forecast for wind, cloud, rain and temperature. Updated from the Thursday 6 August 2026 model run.

Seven-day Cùl Mòr forecast.

Conditions can change quickly with height. Use the day-by-day summit detail below, then check again close to departure.

High confidence
Wind27 mph W Gusts37 mph Feels-1°C Rain0.8 mm Cloud-free summit44% Cloud base870 m Freezing level2,300 m Daylight05:23–21:28 · 16.1 h

Cloud-free timing: Around 0% early, improving to around 83% later.

A mixed day on Cùl Mòr: summit wind broadly 10-30 mph, with gusts 30-40 mph during the evening (strong winds). The ground is likely to be wet after recent rain. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 500-800 m in the morning, lifting to 800-1100 m around midday and 1000-1300 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. Little or no rain expected. Cold on top: air temperature broadly 2 to 6°C, feeling around -2 to 2°C in the wind - wrap up.

Medium confidence
Wind50 mph SW Gusts70 mph Feels2°C Rain19.3 mm Cloud-free summit0% Cloud base308 m Freezing level2,130 m Daylight05:25–21:26 · 16.0 h
High spate risk

Burns and unbridged crossings may rise quickly. Assess them at the water and turn back if unsure.

A rough, clagged-in day on Cùl Mòr: summit wind broadly 40-55 mph, with gusts 65-75 mph early in the morning (storm-force winds). The ground is likely to be wet after recent rain. High spate risk based on forecast rainfall. Burns and unbridged crossings may become difficult or impassable. Most likely from around 00:00 until around 04:00 the following day. Much calmer lower down - generally 15-25 mph in the valley, rising towards the tops. Cloud base mostly around 300-600 m through daylight. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 10-20 mm indicated; local totals could vary considerably. Cold on top: air temperature broadly 6 to 10°C, feeling around 0 to 4°C in the wind - wrap up. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 41-57 mph, so treat the headline as mid-range.

Medium confidence
Wind56 mph SW Gusts79 mph Feels3°C Rain29.5 mm Cloud-free summit0% Cloud base308 m Freezing level2,550 m Daylight05:27–21:23 · 15.9 h
Severe spate risk

Burns and unbridged crossings may rise quickly. Assess them at the water and turn back if unsure.

A rough, clagged-in day on Cùl Mòr: summit wind broadly 45-60 mph, with gusts 75-85 mph around midday (storm-force winds). The ground is likely to be saturated after recent rain. Expect boggy paths and rapid runoff if more rain arrives. Severe spate risk based on forecast rainfall. Burns and unbridged crossings may become unsafe or impassable. Most likely from around 00:00 until around 06:00 the following day. Much calmer lower down - generally 15-25 mph in the valley, rising towards the tops. Cloud base mostly around 400-700 m through daylight. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 20-40 mm indicated; local totals could vary considerably. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 47-65 mph, so treat the headline as mid-range.

Medium confidence
Wind34 mph W Gusts47 mph Feels0°C Rain2.8 mm Cloud-free summit44% Cloud base496 m Freezing level1,822 m Daylight05:29–21:21 · 15.9 h

Cloud-free timing: Around 0% early, improving to around 100% later.

A wild day on Cùl Mòr: summit wind broadly 20-40 mph, with gusts 40-50 mph during the morning (gale-force winds). The ground is likely to be saturated after recent rain. Expect boggy paths and rapid runoff if more rain arrives. Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base around 400-700 m in the morning, lifting to 400-700 m around midday and 900-1200 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain. Cold on top: air temperature broadly 4 to 8°C, feeling around -2 to 2°C in the wind - wrap up. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 25-42 mph, so treat the headline as mid-range.

Low confidence
Wind15 mph NW Gusts21 mph Feels0°C Rain0.2 mm Cloud-free summit56% Cloud base1,035 m Freezing level1,575 m Daylight05:31–21:18 · 15.8 h

Cloud-free timing: Around 0% early, improving to around 83% later.

A mixed day on Cùl Mòr: summit wind broadly 5-20 mph, with gusts 15-25 mph early in the morning (fresh and blowy). The ground is likely to be saturated after recent rain. Expect boggy paths and rapid runoff if more rain arrives. Cloud base around 700-1000 m in the morning, lifting to 1000-1300 m around midday and 1100-1400 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from around midday into the evening. Cloud is likely to hang lowest on northwestern slopes; the southeastern side should see somewhat higher bases and better breaks. Little or no rain expected. Cold on top: air temperature broadly 2 to 6°C, feeling around -2 to 2°C in the wind - wrap up. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 8 to 21 mph; check again nearer the time.

Low confidence
Wind22 mph S Gusts31 mph Feels6°C Rain0.0 mm Cloud-free summit94% Cloud base3,098 m Freezing level2,789 m Daylight05:33–21:16 · 15.7 h

Cloud-free timing: Around 75% early, improving to around 100% later.

A mixed day on Cùl Mòr: summit wind broadly 5-25 mph, with gusts 25-35 mph during the evening (strong winds). The ground is likely to be wet after recent rain. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 2000-3200 m) - clear summits. Little or no rain expected. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 17 to 32 mph; check again nearer the time.

Low confidence
Wind36 mph S Gusts50 mph Feels10°C Rain4.5 mm Cloud-free summit44% Cloud base782 m Freezing level3,325 m Daylight05:35–21:13 · 15.6 h
Thunder risk: moderate

from the morning into the afternoon. Leave exposed summits and ridges if thunder develops.

Cloud-free timing: Around 0% early, improving to around 83% later.

A wild day on Cùl Mòr: summit wind broadly 25-40 mph, with gusts 45-55 mph during the evening (gale-force winds). A meaningful thunderstorm risk is indicated from the morning into the afternoon. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base mostly around 600-900 m through daylight. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Cloud is likely to hang lowest on southern slopes; the northern side should see somewhat higher bases and better breaks. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 20 to 63 mph; check again nearer the time.

Forecast run: 2026-08-06

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