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

Monday 24 August 2026 · The Harris hills and Clisham

Confidence: Medium

Why: This is a short-range forecast, but its detailed model-agreement check is not available; check the stated ranges and hazards.

What matters most

Mostly dry conditions. A noticeable southerly breeze, with many tops staying clear.

High-ground wind · 700 m20 mph southerly Gusts · 700 m25 mph Cloud base300-400 m Feels like · 700 m5°C

High-ground wind (700 m)

Southerly around 20 mph at 700 m. Gusts reaching around 25 mph at 700 m, with locally higher values possible on the most exposed tops. Starting nearer 10 mph, then strengthening toward 15 mph later.

Walking impact

Noticeable on exposed ground, but unlikely to impede most walking.

Rain and showers

Mostly dry.

Cloud-free summits

Around 90%. Around 70% early, improving to around 100% later.

Cloud and visibility

Cloud bases mostly around 300-400 m. Bases are likely to lower later in the day. Many higher summits should stay clear, with useful views for much of the day.

Temperature and wind chill

Around 9°C at 700 m, feeling like 5°C in the wind.

Freezing level

Above the summits.

Daylight

Sunrise 06:09 — Sunset 20:48 — about 14.7 hours daylight.

Updated 24 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.