847 m summit forecast for wind, cloud, rain and temperature. Updated 25 August 2026 at 15:32 UTC.
Canisp on Tuesday 25 August 2026: summit wind around 19 mph SE, gusting 26 mph; modelled cloud-free summit for 93% of daylight; feels like 7°C; 0.0 mm rain.
Conditions can change quickly with height. Use the day-by-day summit detail below, then check again close to departure.
Cloud-free timing: Around 100% early, falling to around 80% later.
A fine day on Canisp: summit wind broadly 10-25 mph, with gusts 20-30 mph around midday (fresh and blowy). Any cloud sits well above the tops (base 900-1200 m) - clear summits. Little or no rain expected.
Cloud-free timing: Cloudy early, clearing later.
A mixed day on Canisp: summit wind broadly 20-35 mph, with gusts 35-45 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 600–900 m in the morning, lifting to 1000–1300 m around midday and 1100–1400 m by late afternoon. Summit cloud should lift later, bringing a better chance of clear views. Little or no rain expected.
Cloud-free timing: Around 67% early, improving to around 100% later.
A mixed day on Canisp: summit wind broadly 10-35 mph, with gusts 35-45 mph early in the morning (strong winds). 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. Little or no rain expected. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 22-31 mph, so treat the headline as mid-range.
A grey, cloudy day on Canisp: summit wind broadly 5-20 mph, with gusts 15-25 mph during the evening (fresh and blowy). Cloud base mostly around 400–700 m through daylight. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Little or no rain expected.
Forecast confidence: Rain is possible, but forecast models differ by about 14 hours on when it arrives.
A grey, cloudy day on Canisp: summit wind broadly 10-20 mph, with gusts 20-30 mph during the morning (fresh and blowy). Cloud base mostly around 400–700 m through daylight. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain.
Forecast confidence: Rain is possible, but forecast models differ by about 7 hours on when it arrives.
Burns and unbridged crossings may rise quickly. Assess them at the water and turn back if unsure.
A rough, clagged-in day on Canisp: summit wind broadly 10-20 mph, with gusts 20-30 mph during the afternoon (fresh and blowy). There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. Most likely from around 00:00 until around 02:00 the following day. Cloud base mostly around 400–700 m through daylight. Expect the top to stay in cloud for most or all of daylight, with no dependable break. A persistently wet day is possible, with around 10-20 mm indicated; local totals could vary considerably.
Forecast confidence: Forecast models disagree on whether meaningful rain reaches the hills during 10:00-16:00.
A grey, cloudy day on Canisp: summit wind broadly 10-30 mph, with gusts 35-45 mph during the evening (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 mostly around 400–700 m through daylight. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain. Confidence moderate (Summit wind could be roughly 21-41 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 21-41 mph, so treat the headline as mid-range.
Forecast run: 2026-08-25
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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. Read how Mountain Weather forecasts are produced and where their limits lie.