White Side weather forecast.

863 m summit forecast for wind, cloud, rain and temperature. Updated 25 August 2026 at 15:32 UTC.

At a glance

Today on White Side.

White Side on Tuesday 25 August 2026: summit wind around 29 mph E, gusting 41 mph; modelled cloud-free summit for 79% of daylight; feels like 3°C; 0.0 mm rain.

High confidenceHow the forecast works

Seven-day White Side forecast.

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

High confidence
Wind29 mph E Gusts41 mph Feels3°C Rain0.0 mm Cloud-free summit79% Cloud base1,052 m Freezing level3,240 m Daylight06:05–20:21 · 14.3 h

Cloud-free timing: Cloudy early, clearing later.

A mixed day on White Side: summit wind broadly 15-35 mph, with gusts 35-45 mph during the evening (gale-force winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud is likely to hang lowest on eastern slopes; the western side should see somewhat higher bases and better breaks. Little or no rain expected.

Medium confidence
Wind36 mph SE Gusts50 mph Feels7°C Rain4.9 mm Cloud-free summit50% Cloud base878 m Freezing level3,010 m Daylight06:07–20:19 · 14.2 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: moderate

from the morning into the evening. Leave exposed summits and ridges if thunder develops.

Cloud-free timing: Around 0% early, improving to around 40% later.

A wild day on White Side: summit wind broadly 25-40 mph, with gusts 45-55 mph during the afternoon (gale-force winds). A meaningful thunderstorm risk is indicated from the morning into the evening. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 500–800 m in the morning, then around 1400–1700 m around midday and 700–1000 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from the morning into the afternoon. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 30-38 mph, so treat the headline as mid-range.

Medium confidence
Wind21 mph E Gusts30 mph Feels11°C Rain8.0 mm Cloud-free summit0% Cloud base512 m Freezing level2,960 m Daylight06:09–20:16 · 14.1 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: moderate

from around midday into the evening. Leave exposed summits and ridges if thunder develops.

A rough, clagged-in day on White Side: summit wind broadly 10-25 mph, with gusts 25-35 mph during the evening (strong winds). A meaningful thunderstorm risk is indicated from around midday into the evening. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 500–800 m in the morning, then around 700–1000 m around midday and 400–700 m by late afternoon. 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 5-10 mm indicated; local totals could vary considerably.

Medium confidence
Wind24 mph NW Gusts33 mph Feels9°C Rain8.4 mm Cloud-free summit21% Cloud base456 m Freezing level3,059 m Daylight06:11–20:14 · 14.1 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: moderate

from around midday into the evening. Leave exposed summits and ridges if thunder develops.

Spate watch

Burns and unbridged crossings may rise quickly. Assess them at the water and turn back if unsure.

Cloud-free timing: Around 0% early, improving to around 60% later.

A rough, clagged-in day on White Side: summit wind broadly 10-30 mph, with gusts 30-40 mph during the evening (strong winds). A meaningful thunderstorm risk is indicated from around midday into the evening. Avoid committing to exposed ridges if storms begin to build. 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 20:00. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 300–600 m in the morning, lifting to 400–700 m around midday and 600–900 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view during the evening. A persistently wet day is possible, with around 5-10 mm indicated; local totals could vary considerably. Confidence moderate (Summit wind could be roughly 15-33 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 15-33 mph, so treat the headline as mid-range.

Medium confidence
Wind18 mph W Gusts26 mph Feels7°C Rain2.3 mm Cloud-free summit7% Cloud base457 m Freezing level2,799 m Daylight06:13–20:12 · 14.0 h

Forecast confidence: Rain is possible, but forecast models differ by about 6 hours on when it arrives.

Cloud-free timing: Best around midday at about 25%; around 0% early and 0% later.

A grey, cloudy day on White Side: summit wind broadly 5-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). 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 400–700 m in the morning, then around 600–900 m around midday and 400–700 m by late afternoon. Expect clag for much of the day, though a brief clearance is possible around midday. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain.

Medium confidence
Wind24 mph SW Gusts33 mph Feels5°C Rain2.2 mm Cloud-free summit29% Cloud base691 m Freezing level2,491 m Daylight06:14–20:09 · 13.9 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: high

from early morning into the evening. Leave exposed summits and ridges if thunder develops.

Cloud-free timing: Around 0% early, improving to around 60% later.

A grey, cloudy day on White Side: summit wind broadly 15-30 mph, with gusts 30-40 mph early in the morning (strong winds). Thunderstorms are a significant hazard from early morning into the evening. Exposed summits and ridges are a poor choice while storms are nearby. The ground is likely to be wet after recent rain. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 400–700 m in the morning, lifting to 600–900 m around midday and 900–1200 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain. Confidence moderate (Summit wind could be roughly 18-35 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 18-35 mph, so treat the headline as mid-range.

Low confidence
Wind36 mph W Gusts50 mph Feels3°C Rain4.3 mm Cloud-free summit50% Cloud base435 m Freezing level2,525 m Daylight06:16–20:07 · 13.8 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: high

from early morning into the evening. Leave exposed summits and ridges if thunder develops.

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

A wild day on White Side: summit wind broadly 20-40 mph, with gusts 45-55 mph during the evening (gale-force winds). Thunderstorms are a significant hazard from early morning into the evening. Exposed summits and ridges are a poor choice while storms are nearby. The ground is likely to be wet after recent rain. Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base around 400-700 m in the morning, lifting to 600-900 m around midday. 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 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. Low confidence (Summit wind could be roughly 22-55 mph, which changes how difficult exposed walking may feel) - the summit peak could be anywhere from 22 to 55 mph; check again nearer the time.

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.