Lewis and Harris
Friday 4 September 2026 · The Harris hills and Clisham
Why: Forecast models differ on whether meaningful rain reaches the hills during the main walking period.
Showers or rain at times. A noticeable southwesterly breeze, with cloud coming and going on the tops.
High-ground wind (700 m)
Southwesterly 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
Showers or spells of rain at times. The heaviest rain is expected later in the day.
Cloud-free summits
Around 35%. Around 55% early, falling to around 40% later.
Cloud and visibility
Cloud bases mostly around 600-700 m. Bases are likely to lower later in the day. Cloud is likely to come and go on the higher summits; breaks may be useful but not dependable.
Temperature and wind chill
Around 7°C at 700 m, feeling like 3°C in the wind.
Freezing level
Above the summits.
Daylight
Sunrise 06:32 — Sunset 20:18 — about 13.8 hours daylight.
Overnight · 6 p.m.–9 a.m.Wild campingBetaA damp or wet night is likely, with about 2.2 mm before pack-up. 82/100Good · 600 m View detailsHide details
Full regional overnight outlook
Across representative hills, open-hillside camping looks promising around 600 m (82/100). Some overnight rain is likely, so expect a damp pitch or pack-up.
The full morning pack-up period is not yet covered, so this is a partial overnight view.
Elevation reference (open ground)
- Wind / gust
- 8 / 14 mph
- Coldest
- 9.2°C
- In cloud
- Unlikely
- Condensation
- Moderate
- Wind / gust
- 10 / 17 mph
- Coldest
- 8.6°C
- In cloud
- 33% of night
- Condensation
- Moderate
Open-hillside guidance across representative hills. Local shelter, ridges, tent design and the exact pitch can change conditions substantially. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.
Daytime · exposed rockClimbing & scramblingBetaWet rock is likely on some representative hills. 22/100Poor · Poor View detailsHide details
Full regional climbing & scrambling outlook
Conditions for exposed scrambling across the area look poor (22/100). Rain is likely to leave rock wet; polished slabs, vegetation and drainage lines may be notably worse. Mapped summit-point geology across the representative hills includes granite, gneiss or gabbro; moisture response can therefore vary substantially between crags and routes.
Representative summit-point samples across the region; individual crags and routes may differ.
Generic exposed hands-on-rock terrain across representative summits; mapped summit-point geology is a broad regional sample, not a named-route survey. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.
Updated 30 August 2026 at 04:40 UTC. See typical weekly and monthly conditions for Lewis and Harris.