Cairn of Claise weather forecast.

1,064 m summit forecast for wind, cloud, rain and temperature. Updated from the Thursday 6 August 2026 model run.

Seven-day Cairn of Claise forecast.

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

Medium confidence
Wind32 mph NW Gusts44 mph Feels-3°C Rain0.1 mm Cloud base1,510 m Freezing level1,920 m

A mixed day on Cairn of Claise: summit wind broadly 15-35 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 1000-1600 m - 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. Cold on top: air temperature broadly 2 to 6°C, feeling around -4 to 0°C in the wind - wrap up. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 29-39 mph, so treat the headline as mid-range.

Medium confidence
Wind42 mph SW Gusts59 mph Feels-1°C Rain2.4 mm Cloud base581 m Freezing level2,080 m

A rough, clagged-in day on Cairn of Claise: summit wind broadly 30-45 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 500-800 m - expect the top to stay in cloud for most or all of the day, with no dependable break. Cloud will be lowest on the SW slopes, down to about 400-700 m; the NE side should be clearer, lifting to around 800-1100 m. 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 35-48 mph, so treat the headline as mid-range.

Medium confidence
Wind40 mph SW Gusts56 mph Feels1°C Rain5.2 mm Cloud base543 m Freezing level2,840 m

A rough, clagged-in day on Cairn of Claise: summit wind broadly 30-45 mph, with gusts 50-60 mph early in the morning (storm-force winds). Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base 500-800 m - expect the top to stay in cloud for most or all of the day, with no dependable break. Cloud will be lowest on the SW slopes, down to about 400-700 m; the NE side should be clearer, lifting to around 700-1000 m. 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 0 to 4°C in the wind - wrap up. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 30-48 mph, so treat the headline as mid-range.

Medium confidence
Wind37 mph W Gusts52 mph Feels2°C Rain0.6 mm Cloud base1,035 m Freezing level2,200 m

A wild day on Cairn of Claise: summit wind broadly 20-40 mph, with gusts 45-55 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 500-1500 m - the top is likely to drift in and out of cloud, with the best chance of a view from around midday into the evening. The cloud base is very changeable today - it could sit much higher or lower than that at times, so read the sky. Cloud will be lowest on the W slopes, down to about 900-1200 m; the E side should be clearer, lifting to around 1100-1400 m. Little or no rain expected. 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 26-45 mph, so treat the headline as mid-range. Cloud base is the least certain part of this - the models are only moderately agreed, so it could sit a couple of hundred metres either way.

Low confidence
Wind15 mph NW Gusts19 mph Feels2°C Rain0.0 mm Cloud base1,510 m Freezing level1,950 m

A fine day on Cairn of Claise: summit wind broadly 5-20 mph, with gusts 15-25 mph early in the morning (a moderate breeze). Any cloud sits well above the tops (base 1400-2100 m) - clear summits. 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 9 to 24 mph; check again nearer the time.

Low confidence
Wind21 mph S Gusts29 mph Feels3°C Rain0.0 mm Cloud base845 m Freezing level2,100 m

A grey, cloudy day on Cairn of Claise: summit wind broadly 10-25 mph, with gusts 25-35 mph during the evening (fresh and blowy). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base 600-1100 m - expect clag for much of the day, though a brief clearance is possible during the morning. Little or no rain expected. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 9 to 27 mph; check again nearer the time.

Low confidence
Wind33 mph S Gusts47 mph Feels10°C Rain0.8 mm Cloud base1,488 m Freezing level2,950 m

A wild day on Cairn of Claise: summit wind broadly 25-40 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 1000-1500 m - 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 will be lowest on the S slopes, down to about 1300-1600 m; the N side should be clearer, lifting to around 1700-2000 m. Little or no rain expected. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 16 to 55 mph; check again nearer the time.

Forecast run: 2026-08-06

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.