Càrn Dearg (Monadhliath) weather forecast.

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

Seven-day Càrn Dearg (Monadhliath) forecast.

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

High confidence
Wind18 mph W Gusts25 mph Feels-0°C Rain0.0 mm Cloud-free summit69% Cloud base1,511 m Freezing level2,150 m Daylight05:24–21:20 · 15.9 h

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

A mixed day on Càrn Dearg (Monadhliath): summit wind broadly 5-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Cloud base around 700-1000 m in the morning, lifting to 1500-1800 m around midday and 1500-1800 m by late afternoon. The top is likely to drift in and out of cloud; views may come and go. 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
Wind44 mph SW Gusts61 mph Feels1°C Rain5.0 mm Cloud-free summit0% Cloud base573 m Freezing level2,160 m Daylight05:26–21:17 · 15.8 h

A rough, clagged-in day on Càrn Dearg (Monadhliath): summit wind broadly 35-50 mph, with gusts 55-65 mph during the evening (storm-force winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 700-1000 m in the morning, lowering to 700-1000 m around midday and 500-800 m by late afternoon. 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. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain. Cold on top: air temperature broadly 6 to 10°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 33-53 mph, so treat the headline as mid-range.

Medium confidence
Wind54 mph SW Gusts75 mph Feels2°C Rain0.9 mm Cloud-free summit12% Cloud base746 m Freezing level2,880 m Daylight05:28–21:15 · 15.8 h

Cloud-free timing: Best around midday at about 25%; lowest early at about 0%.

A rough, clagged-in day on Càrn Dearg (Monadhliath): summit wind broadly 40-60 mph, with gusts 70-80 mph around midday (storm-force winds). Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base mostly around 700-1000 m through daylight. Expect clag for much of the day, though a brief clearance is possible around midday. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. Little or no rain expected. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 40-62 mph, so treat the headline as mid-range.

Medium confidence
Wind31 mph W Gusts44 mph Feels1°C Rain2.1 mm Cloud-free summit75% Cloud base976 m Freezing level1,990 m Daylight05:30–21:13 · 15.7 h

Cloud-free timing: Around 25% early, improving to around 83% later.

A mixed day on Càrn Dearg (Monadhliath): summit wind broadly 20-35 mph, with gusts 40-50 mph early in the morning (gale-force winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 700-1000 m in the morning, lifting to 1400-1700 m around midday and 1400-1700 m by late afternoon. The top is likely to drift in and out of cloud; views may come and go. 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 22-40 mph, so treat the headline as mid-range.

Low confidence
Wind15 mph NW Gusts19 mph Feels1°C Rain0.3 mm Cloud-free summit81% Cloud base1,513 m Freezing level1,929 m Daylight05:32–21:10 · 15.6 h

Cloud-free timing: Around 50% early, improving to around 83% later.

A fine day on Càrn Dearg (Monadhliath): summit wind broadly 5-20 mph, with gusts 15-25 mph early in the morning (a moderate breeze). Little or no rain expected. Cold on top: air temperature broadly 4 to 8°C, feeling around 0 to 4°C in the wind - wrap up. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 8 to 20 mph; check again nearer the time.

Low confidence
Wind25 mph S Gusts35 mph Feels2°C Rain0.0 mm Cloud-free summit62% Cloud base1,176 m Freezing level2,952 m Daylight05:34–21:08 · 15.6 h

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

A mixed day on Càrn Dearg (Monadhliath): summit wind broadly 10-30 mph, with gusts 30-40 mph during the evening (strong winds). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 600-900 m in the morning, 3100-3400 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 the morning into the evening. Little or no rain expected. Bright spells with UV up to 5 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 14 to 32 mph; check again nearer the time.

Low confidence
Wind35 mph S Gusts49 mph Feels11°C Rain1.4 mm Cloud-free summit100% Cloud base1,029 m Freezing level3,240 m Daylight05:36–21:06 · 15.5 h
Thunder risk: moderate

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

A wild day on Càrn Dearg (Monadhliath): summit wind broadly 25-40 mph, with gusts 45-55 mph during the morning (gale-force winds). A meaningful thunderstorm risk is indicated from late afternoon into the evening. 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. Any cloud sits well above the tops (base 1000-1300 m) - clear summits. 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 up to around 2 mm indicated; timing and local totals remain uncertain. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 19 to 63 mph; check again nearer the time.

Forecast run: 2026-08-06

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