Eryri (Snowdonia) mountain weather forecast.

Yr Wyddfa, the Glyderau and the Carneddau. 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

Eryri (Snowdonia)

Tuesday 25 August 2026 · Yr Wyddfa, the Glyderau and the Carneddau

Confidence: High

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

What matters most

Strong southeasterly wind is the main concern. Expect mostly dry conditions, with many tops staying clear.

High-ground wind · 900 m35 mph southeasterly Gusts · 900 m50 mph Cloud base1700-1800 m Feels like · 900 m5°C

High-ground wind (900 m)

Southeasterly around 35 mph at 900 m. Gusts reaching around 50 mph at 900 m, with locally higher values possible on the most exposed tops. Strongest early (around 30 mph), easing toward 25 mph later.

Walking impact

Arduous in exposure, with buffeting and difficult progress into the wind.

Rain and showers

Mostly dry.

Cloud-free summits

Around 70%. Cloudy early, clearing later.

Cloud and visibility

Cloud bases mostly around 1700-1800 m. Bases should tend to lift as the day goes on. Many higher summits should stay clear, with useful views for much of the day.

Temperature and wind chill

Around 10°C at 900 m, rising from about 11°C early to 13°C by afternoon, feeling like 5°C in the wind.

Freezing level

Above the summits.

Daylight

Sunrise 06:13 — Sunset 20:22 — about 14.2 hours daylight.

Updated 25 August 2026 at 15:32 UTC. How this forecast is produced.

Stay near Eryri (Snowdonia).

Use Snowdon - Yr Wyddfa 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.