Ben Macdui weather forecast.

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

A mixed day on Ben Macdui: summit wind broadly 10-30 mph, with gusts 25-35 mph early in the morning (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. Cloud base around 700-1000 m in the morning, lifting to 1300-1600 m around midday and 1500-1800 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 0 to 4°C, feeling around -6 to -2°C in the wind - wrap up. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 20-28 mph, so treat the headline as mid-range.

A rough, clagged-in day on Ben Macdui: summit wind broadly 30-45 mph, with gusts 50-60 mph around midday (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 2-5 mm indicated; timing and local totals remain uncertain. 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 34-46 mph, so treat the headline as mid-range.

A rough, clagged-in day on Ben Macdui: summit wind broadly 40-55 mph, with gusts 65-75 mph during the afternoon (storm-force winds). Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base around 700-1000 m in the morning, 500-800 m around midday and 700-1000 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 up to around 2 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.

Cloud-free timing: Around 0% early, improving to around 50% later.

A wild day on Ben Macdui: summit wind broadly 20-40 mph, with gusts 45-55 mph during the morning (gale-force winds). Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base around 900-1200 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, with the best chance of a view from around midday 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 2 to 6°C, feeling around -4 to 0°C in the wind - wrap up. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 22 to 45 mph; check again nearer the time.

Cloud-free timing: Around 0% early, improving to around 33% later.

A grey, cloudy day on Ben Macdui: summit wind broadly 5-20 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Cloud base around 500-800 m in the morning, lifting to 1000-1300 m around midday and 1000-1300 m by late afternoon. Expect clag for much of the day, though a brief clearance is possible during the evening. Cloud is likely to hang lowest on northwestern slopes; the southeastern 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 0 to 4°C, feeling around -4 to 0°C in the wind - wrap up. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 10 to 29 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.

Cloud-free timing: Best around midday at about 50%; around 0% early and 17% later.

A grey, cloudy day on Ben Macdui: 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 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 midday into the afternoon. 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 17 to 33 mph; check again nearer the time.

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

A wild day on Ben Macdui: summit wind broadly 30-40 mph, with gusts 45-55 mph during the morning (gale-force winds). A meaningful thunderstorm risk is indicated from the afternoon into overnight. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base around 1500-1800 m around midday, lowering to 500-800 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from early morning into around midday. 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 24 to 52 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.