Clwydian Range and Berwyns mountain weather forecast.

The Berwyns and northeast Wales. Height-aware guidance for wind, cloud, rain and temperature.

Mountain Weather brief

Clwydian Range and Berwyns

Monday 19 October 2026 · The Berwyns and northeast Wales

Confidence: Medium Why?

Uncertainty over high-ground wind strength. Uncertainty over sky cloud cover and sunshine.

What matters most

A fine day in the Clwydian Range and the Berwyns: dry, with light winds.

High-ground wind · 600 m5-15 mph easterly Gusts · 600 m10-20 mph Cloud base800-1400 m Feels like · 600 m-4 to 0°C
Regional median

Sunshine and sky

Sunshine varies by period. Sunshine amounts vary between the morning, midday and later periods.

Modelled sunshine4.6 h42% of daylight
EarlyLess than 1 hour sunshine
Midday3.1 h sunshine
LaterLess than 1 hour sunshine

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.

Morning · 08:00–12:00ExcellentSummit winds around 0-10 mph. Gusts around 10-20 mph are possible on exposed ground.
95
Afternoon · 12:00–17:00ExcellentSummit winds around 0-10 mph. Gusts around 5-15 mph are possible on exposed ground. Summit cloud becomes more persistent later.
88

Conservative regional grades across representative summits, so one sheltered hill does not overstate the wider area.

01

High-ground wind (600 m)

At around 600 m, expect an easterly wind of 5–15 mph, gusting 10–20 mph.

02

Walking impact

Little effect on walking, although exposed tops may still feel chilly.

03

Rain and showers

It should stay dry.

04

Cloud-free summits

Clear-summit estimate: about 90% early, about 55% around midday and about 40% later.

05

Cloud and visibility

The tops should stay mostly clear of cloud. Mist or fog is possible in some valleys early on.

06

Temperature and wind chill

At around 600 m it will be 2 to 6°C, feeling like -4 to 0°C in the wind. Take a hat, gloves, a windproof and a spare warm layer.

07

Freezing level

The freezing level is close to summit height.

08

Daylight

Sunrise 07:46, Sunset 18:10, about 10.4 hours daylight.

Overnight · 17:00–08:00Wild campingBetaAcross these hills, a reasonable night to camp, with a well-chosen pitch: gusts of about 20 mph. 64Mixed · 600 m View detailsHide details
Regional night beginning Monday 19 October 2026

Full regional overnight outlook

Across these hills, a reasonable night to camp, with a well-chosen pitch. Light winds on open ground, gusting no more than about 20 mph. Some light rain is forecast overnight. The air is damp at every height we checked (300-600 m), so expect heavy condensation. Leave the vents open. Overnight lows of about 5°C at 300 m.

Overnight rain1.5 mmOpen ground · 600 m13 mph · gusts 21 mphMorning pack-upDampness possible

Moon overnight

Waxing gibbous moon

Illuminated disc
63%
Moonrise
Outside this window
Moonset
00:27 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: 19 Oct, 17:00 BST to 20 Oct, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Representative location: 52.917, -3.746. Times vary across the area.

300 m64 · mixed
Wind / gust
11 mph / 18 mph
Coldest
5.1°C
In cloud
0% of modelled night
Condensation
High
600 m64 · mixed
Wind / gust
13 mph / 21 mph
Coldest
5.1°C
In cloud
7% 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 & scramblingBetaCold rock may reduce comfort and dexterity. 88Excellent · Good View detailsHide details
Regional rock conditions · sampled mountain terrain

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 good (88/100). Rock is likely to be mostly dry, though local seepage and shaded holds remain unresolved. Mapped summit-point geology across the representative hills includes slate or mudstone and volcanic rock. Rock can therefore respond differently to moisture between crags and routes.

Rock surfaceProbably dryExposed gust16 mphRainPossible · 22%
Mapped rock across sampled summits2 broad familiesSummit samples, not a survey of every crag
slate or mudstone 62% 5 representative summitsOften positive when dry, but smooth, polished or slabby sections can become markedly more slippery when damp.volcanic rock 38% 3 representative summitsOften grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.

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 15:29 UTC. See typical weekly and monthly conditions for Clwydian Range and Berwyns.

More context for your hill day

Check the approach as well as the tops

Compare midge conditions by day and height, or look for a possible cloud inversion. For Snowdon and Tryfan, camera-derived cloud-base observations add a view of conditions already seen on the slopes.