Lewis and Harris mountain weather forecast.

The Harris hills and Clisham. Height-aware guidance for wind, cloud, rain and temperature.

Choose your hills and day.

Each regional brief uses a high-ground level that suits the terrain—from 500 m on Dartmoor and in the Peak District to 900 m in the highest ranges.

Mountain Weather brief

Lewis and Harris

Wednesday 26 August 2026 · The Harris hills and Clisham

Confidence: High

Why: Forecast models broadly agree on the conditions most relevant to walkers.

What matters most

Mostly dry conditions. Light southeasterly wind, with cloud coming and going on the tops.

High-ground wind · 700 m10 mph southeasterly Gusts · 700 m15 mph Cloud base700-800 m Feels like · 700 m9°C

High-ground wind (700 m)

Southeasterly around 10 mph at 700 m. Gusts reaching around 15 mph at 700 m, with locally higher values possible on the most exposed tops. Starting nearer 5 mph, then strengthening toward 10 mph later.

Walking impact

Little effect on walking, although exposed tops may still feel chilly.

Rain and showers

Mostly dry.

Cloud-free summits

Around 60%. Around 0% early, improving to around 60% later.

Cloud and visibility

Cloud bases mostly around 700-800 m. Bases should tend to lift as the day goes on. Cloud is likely to come and go on the higher summits; breaks may be useful but not dependable.

Temperature and wind chill

Around 11°C at 700 m, feeling like 9°C in the wind.

Freezing level

Above the summits.

Daylight

Sunrise 06:13 — Sunset 20:43 — about 14.5 hours daylight.

Updated 26 August 2026 at 04:40 UTC. How this forecast is produced.

Stay near Lewis and Harris.

Use Clisham as a practical starting point for whole-home stays with a useful drive to established walking routes.

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Forecasts built around recognisable hill country.

Twenty distinct regions replace inherited service boundaries. Each uses a representative height suited to its terrain; named summits retain their exact height and exposure.