Eryri (Snowdonia)
A poor day on the tops in Eryri (Snowdonia), with strong, gusty winds.
Sunshine and sky
Sunshine through the day. The time blocks show where the model places the brighter spells.
These are direct modelled sunshine hours during daylight, not the probability of sunshine. Cloud cover and summit cloud are assessed separately in the forecast above. The regional median prevents one unusually bright or dull summit cell defining the whole area.
Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.
High-ground wind (900 m)
At around 900 m, expect a westerly wind of 30–40 mph, gusting 40–50 mph. Gusts like that are strong enough to knock you off balance, so take care near edges and on narrow ridges.
Walking impact
Gusts of 40–50 mph are strong enough to knock you off balance, so take care near edges and on narrow ridges.
Thunderstorms
There is a small chance of a thunderstorm from early morning into the afternoon. If you hear thunder, head down off the tops and away from ridges. If a thunderstorm develops, sudden gusts and heavy rain can change conditions quickly.
Rain and showers
Drizzle sets in mid-afternoon. Rain is possible during the afternoon, but forecast models disagree on whether it will fall.
Cloud-free summits
Clear-summit estimate: about 10% early, about 50% around midday and about 75% later.
Cloud and visibility
The tops are likely to drift in and out of cloud, with the best chance of clear tops in the early afternoon. The cloud base could be as low as 500–800 m early in the morning.
Temperature and wind chill
At around 900 m it will be 6 to 10°C, feeling like 0 to 4°C in the wind. A windproof and an extra layer for stops will help. Pack waterproofs too, and keep a warm layer dry in your pack.
Freezing level
The freezing level is above the summits.
Daylight
Sunrise 07:38, Sunset 18:25, about 10.8 hours daylight.
Overnight · 17:00–08:00Wild campingBetaToo windy for an exposed pitch up around 900 m on some hills (gusts of about 40 mph). Lower down, a mixed night to camp, mainly because of the wind. 39Poor · 600 m View detailsHide details
Full regional overnight outlook
Too windy for an exposed pitch up around 900 m on some hills. Lower down, a mixed night to camp, mainly because of the wind. Gusts reach about 40 mph around 900 m and nearer 30 mph around 300 m, which makes for a noisy, testing night even in a good tent. Check the forecast for the hill and height you have in mind, and don't assume lower ground will be sheltered. It should stay dry. Overnight lows of about 6°C at 900 m. The moon won't be up after dark, so there will be no moonlight.
Elevation reference (open ground)
- Wind / gust
- 18 mph / 29 mph
- Coldest
- 8.0°C
- In cloud
- 0% of modelled night
- Condensation
- Low
- Wind / gust
- 21 mph / 35 mph
- Coldest
- 8.0°C
- In cloud
- 0% of modelled night
- Condensation
- Low
- Wind / gust
- 25 mph / 41 mph
- Coldest
- 6.1°C
- In cloud
- 13% of modelled 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 & scramblingBetaA small chance of a thunderstorm in parts of the area. Avoid exposed scrambling if storms develop. Wet rock is likely. Gusts near 45 mph may affect balance on exposed rock. 0Poor · Very poor View detailsHide details
Regional climbing & scrambling outlook
A broad guide to dampness and exposed rock across the area, not a forecast for every crag. Lower, sheltered crags and individual rock types may behave differently.
Conditions for exposed scrambling across the area look very poor (0/100). Rain is likely to leave rock wet. Polished slabs, vegetation and drainage lines may be notably worse. Gusts may reach about 45 mph on exposed ground, making crosswinds an important route consideration. Mapped summit-point geology across the representative hills includes volcanic rock and slate or mudstone. Rock can therefore respond differently to moisture between crags and routes. A small chance of a thunderstorm in parts of the area. Storm timing is uncertain, so avoid committing to exposed rock if storms may develop.
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.
Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit
For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.
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Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Updated 13 October 2026 at 15:27 UTC. See typical weekly and monthly conditions for Eryri (Snowdonia).