An Ruadh-stac weather forecast.

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

Seven-day An Ruadh-stac forecast.

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

High confidence
Wind25 mph W Gusts35 mph Feels-1°C Rain0.7 mm Cloud-free summit25% Cloud base817 m Freezing level1,920 m Daylight05:27–21:26 · 16.0 h

A grey, cloudy day on An Ruadh-stac: summit wind broadly 15-30 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 500-1100 m - the top is likely to drift in and out of cloud, with the best chance of a view from late morning into midday. Cloud will be lowest on the W slopes, down to about 700-1000 m; the E side should be clearer, lifting to around 900-1200 m. 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
Wind57 mph SW Gusts80 mph Feels1°C Rain14.3 mm Cloud-free summit0% Cloud base551 m Freezing level2,000 m Daylight05:29–21:24 · 15.9 h

A rough, clagged-in day on An Ruadh-stac: summit wind broadly 45-60 mph, with gusts 75-85 mph during the evening (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 800-1100 m. 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 -2 to 2°C in the wind - wrap up. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 39-69 mph, so treat the headline as mid-range.

Low confidence
Wind57 mph SW Gusts80 mph Feels3°C Rain39.6 mm Cloud-free summit0% Cloud base517 m Freezing level2,560 m Daylight05:31–21:22 · 15.8 h

A rough, clagged-in day on An Ruadh-stac: summit wind broadly 45-60 mph, with gusts 75-85 mph early in the morning (storm-force winds). Much calmer lower down - generally 15-25 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 300-600 m; the NE side should be clearer, lifting to around 800-1100 m. A persistently wet day is possible, with around 20-40 mm indicated; local totals could vary considerably. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 36 to 75 mph; check again nearer the time.

Low confidence
Wind40 mph W Gusts57 mph Feels1°C Rain7.1 mm Cloud-free summit25% Cloud base725 m Freezing level1,900 m Daylight05:33–21:19 · 15.8 h

A rough, clagged-in day on An Ruadh-stac: summit wind broadly 25-45 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 400-1000 m - the top is likely to drift in and out of cloud, with the best chance of a view from midday into the afternoon. Cloud will be lowest on the W slopes, down to about 600-900 m; the E side should be clearer, lifting to around 900-1200 m. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain. 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 27 to 59 mph; check again nearer the time.

Low confidence
Wind11 mph NW Gusts15 mph Feels2°C Rain0.6 mm Cloud-free summit56% Cloud base1,351 m Freezing level1,750 m Daylight05:35–21:17 · 15.7 h

A mixed day on An Ruadh-stac: summit wind broadly 5-15 mph, with gusts 10-20 mph during the afternoon (a moderate breeze). Cloud base 500-1600 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. Little or no rain expected. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 7 to 17 mph; check again nearer the time. 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
Wind25 mph S Gusts32 mph Feels6°C Rain0.0 mm Cloud-free summit94% Cloud base3,099 m Freezing level2,300 m Daylight05:37–21:15 · 15.6 h

A mixed day on An Ruadh-stac: summit wind broadly 10-30 mph, with gusts 25-35 mph during the evening (strong winds). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 1200-3200 m) - clear summits. Little or no rain expected. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 16 to 40 mph; check again nearer the time. 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
Wind45 mph S Gusts62 mph Feels6°C Rain5.0 mm Cloud-free summit12% Cloud base772 m Freezing level2,500 m Daylight05:39–21:12 · 15.6 h

A rough, clagged-in day on An Ruadh-stac: summit wind broadly 35-50 mph, with gusts 55-65 mph during the morning (storm-force winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base 200-800 m - expect clag for much of the day, though a brief clearance is possible during the afternoon. Cloud will be lowest on the S slopes, down to about 600-900 m; the N side should be clearer, lifting to around 1000-1300 m. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 24 to 71 mph; check again nearer the time.

Forecast run: 2026-08-06

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