A mixed day on Arkle: summit wind broadly 15-35 mph, with gusts 35-45 mph during the evening (gale-force winds). Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base 700-1100 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. 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. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 23-34 mph, so treat the headline as mid-range.
Arkle weather forecast.
787 m summit forecast for wind, cloud, rain and temperature. Updated from the Thursday 6 August 2026 model run.
Seven-day Arkle forecast.
Conditions can change quickly with height. Use the day-by-day summit detail below, then check again close to departure.
A rough, clagged-in day on Arkle: summit wind broadly 45-60 mph, with gusts 75-85 mph during the morning (storm-force winds). Much calmer lower down - generally 25-35 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 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 48-66 mph, so treat the headline as mid-range.
A rough, clagged-in day on Arkle: summit wind broadly 35-55 mph, with gusts 65-75 mph during the afternoon (storm-force winds). Much calmer lower down - generally 20-30 mph in the valley, rising towards the tops. Cloud base 100-600 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 700-1000 m. 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 39-56 mph, so treat the headline as mid-range.
A rough, clagged-in day on Arkle: summit wind broadly 25-40 mph, with gusts 45-55 mph around midday (gale-force winds). Much calmer lower down - generally 15-25 mph in the valley, rising towards the tops. Cloud base 400-700 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 W slopes, down to about 400-700 m; the E side should be clearer, lifting to around 600-900 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 0 to 4°C in the wind - wrap up. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 23-44 mph, so treat the headline as mid-range.
A grey, cloudy day on Arkle: summit wind broadly 5-20 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Cloud base 500-800 m - expect the top to stay in cloud for most or all of the day, with no dependable break. 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 6 to 27 mph; check again nearer the time.
A mixed day on Arkle: summit wind broadly 5-25 mph, with gusts 20-30 mph during the evening (fresh and blowy). Cloud base 500-2100 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. 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 13 to 30 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.
A wild day on Arkle: summit wind broadly 30-45 mph, with gusts 50-60 mph during the evening (storm-force winds). Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base 700-2000 m - the top is likely to drift in and out of cloud, with the best chance of a view from early morning into around midday. 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 SW slopes, down to about 800-1100 m; the NE side should be clearer, lifting to around 1200-1500 m. 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 80 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.