Eryri (Snowdonia)
A poor day on the tops in Eryri (Snowdonia), with drizzle for much of the day and a blustery wind.
Sunshine and sky
More sunshine later. Sunshine is indicated more often later in the day.
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 southerly wind of 25–35 mph, gusting 35–45 mph. Gusts like that are strong enough to make walking into it hard work, with buffeting on ridges and edges.
Walking impact
Gusts of 35–45 mph are strong enough to make walking into it hard work, with buffeting on ridges and edges.
Rain and showers
Drizzle for much of the day. Expect 2–5 mm in total.
Cloud-free summits
Clear-summit estimate: about 85% early, about 35% 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 800–1100 m in the early afternoon.
Temperature and wind chill
At around 900 m it will be 4 to 8°C, feeling like -2 to 2°C in the wind. Take a hat, gloves, a windproof and a spare warm layer. Pack waterproofs too, and keep a warm layer dry in your pack.
Freezing level
The freezing level is above the summits.
Daylight
Sunrise 07:52, Sunset 18:07, about 10.2 hours daylight.
Overnight · 17:00–08:00Wild campingBetaAcross these hills, a mixed night to camp, mainly because of the wind: gusts of about 40 mph and around 10 mm of rain. 49Poor · 600 m View detailsHide details
Full regional overnight outlook
Across these hills, a mixed night to camp, mainly because of the wind. Gusts reach about 40 mph around 900 m and nearer 25 mph around 300 m, which makes for a noisy, testing night even in a good tent. Look for shelter from the south. About 10 mm of rain is forecast overnight. Up around 900 m you'd likely be in cloud for part of the night: damp, and hard to find your way if you need to move. Overnight lows of about 4°C at 900 m.
Moon overnight
Waxing gibbous moon
- Illuminated disc
- 80%
- Moonrise
- Outside this window
- Moonset
- 03:03 next morning BST
Cloud and terrain vary across the area. Illumination describes the sunlit part of the Moon, not brightness at your pitch.
Overnight window: 21 Oct, 17:00 BST to 22 Oct, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.
Representative location: 53.069, -4.076. Times vary across the area.
Elevation reference (open ground)
- Wind / gust
- 14 mph / 27 mph
- Coldest
- 5.7°C
- In cloud
- 0% of modelled night
- Condensation
- High
- Wind / gust
- 16 mph / 32 mph
- Coldest
- 5.7°C
- In cloud
- 7% of modelled night
- Condensation
- High
- Wind / gust
- 19 mph / 38 mph
- Coldest
- 3.8°C
- In cloud
- 47% of modelled night
- Condensation
- High
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. Gusts near 40 mph may affect balance on exposed rock. 27Poor · 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 poor (27/100). Rain is likely to leave rock wet. Polished slabs, vegetation and drainage lines may be notably worse. Gusts may reach about 40 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.
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 15 October 2026 at 05:28 UTC. See typical weekly and monthly conditions for Eryri (Snowdonia).