Eryri (Snowdonia)
A wild day on the tops in Eryri (Snowdonia), with very strong, gusty winds and burns likely to be in spate. Not a day for the summits.
Sunshine and sky
Extensive cloud. Cloud is likely to remain extensive for much of 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 south-westerly wind of 45–55 mph, gusting 60–70 mph. Gusts like that are strong enough to make walking very difficult and tiring, with a risk of being blown off your feet. Avoid exposed ridges and edges.
Walking impact
Gusts of 60–70 mph are strong enough to make walking very difficult and tiring, with a risk of being blown off your feet. Avoid exposed ridges and edges.
Ground conditions
The ground is likely to be wet after recent rain.
Spate risk
High spate risk based on forecast rainfall. Burns and unbridged crossings may become difficult or impassable. Timing and severity can vary between catchments. Check the peak forecast for the separate rain/runoff periods. Turn back if a crossing looks unsafe.
Rain and showers
A band of rain moves in around midday, heavy at times. Expect 20–40 mm in total. Rain is possible during the morning, but forecast models disagree on whether it will fall. Rain is forecast during the afternoon, but models differ considerably on the amount. Drizzle is possible on some hills. On some hills, cloud may make navigation difficult, with very poor visibility in wetter spells.
Cloud-free summits
Clear-summit estimate: about 10% early, about 10% around midday and about 45% later.
Cloud and visibility
Expect many summits to be in cloud for most of the day. The cloud base could be as low as 500–800 m in the early afternoon. In cloud you'll be finding your way without landmarks, so carry navigation you trust and know how to use, with a backup such as a spare battery or a map and compass.
Temperature and wind chill
At around 900 m it will be 4 to 8°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 07:41, Sunset 18:21, about 10.7 hours daylight.
Overnight · 17:00–08:00Wild campingBetaAcross these hills, a reasonable night to camp, with a well-chosen pitch: gusts of about 25 mph. 64Mixed · 600 m View detailsHide details
Full regional overnight outlook
Across these hills, a reasonable night to camp, with a well-chosen pitch. Gusts reach about 25 mph on open ground, so peg out well and use the guylines. Look for shelter from the west. Some light rain is forecast overnight. Above about 600 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 3°C at 900 m.
Moon overnight
Waxing crescent moon
- Illuminated disc
- 26%
- Moonrise
- Outside this window
- Moonset
- 19:59 BST
Cloud and terrain vary across the area. Illumination describes the sunlit part of the Moon, not brightness at your pitch.
Overnight window: 15 Oct, 17:00 BST to 16 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
- 12 mph / 17 mph
- Coldest
- 5.2°C
- In cloud
- 0% of modelled night
- Condensation
- Moderate
- Wind / gust
- 14 mph / 21 mph
- Coldest
- 5.2°C
- In cloud
- 40% of modelled night
- Condensation
- Moderate
- Wind / gust
- 17 mph / 25 mph
- Coldest
- 3.3°C
- In cloud
- 47% 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 & scramblingBetaWet rock is likely. Gusts near 65 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 65 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 14 October 2026 at 15:27 UTC. See typical weekly and monthly conditions for Eryri (Snowdonia).