Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Tuesday 13th November 2018
Forecast last updated on Monday 12th November 2018 at 4:07pm

Summary for all mountain areas

Brisk winds much of the day across the hills. Largely dry. Showers focused on western areas from dawn (snow Scottish tops) will fizzle out. Cloud breaks to higher tops away from the west coast. Into the evening and night, rain and upland gales will return from the west.

Headline for Snowdonia National Park

Blustery, chilly. Rare showers morning. Many tops clearing.

How windy? (On the summits)

West gradually backing southerly; 25 to 35mph, or 40-45mph at dawn; easing a little in middle of day. Toward dusk will strengthen to 40mph, then 50-60mph after dark.

Effect of wind on you?

Walking at times arduous on higher areas, particularly early and late in the day; generally deteriorating into the night.

How Wet? (Precipitation and its impact)

Brief showers morning

Isolated brief showers morning, mainly west Wales, will all fade. After dark, persistent rain will develop from the south-west; heaviest Snowdon range.

Cloud on the hills?

Breaking toward higher tops

Cloud base 750m morning, but patches below 600m near showers. Will lift toward 900m or above; clearing most tops in east Wales.

Chance of cloud free summits?

30% lifting to 60% by midday.

Sunshine?
Air clarity (below cloud)

Occasional sunshine, mainly east Wales. Very good visibility.

How Cold? (at 900m)

4C Wind chill where exposed will feel close to -8C.

Freezing Level

Above the summits

Planning Outlook

All mountain areas of Britain from Wednesday 14th November 2018

Very wet underfoot on western mountains through midweek with localised flooding possible in south-west Scotland, the Lakes & west Wales. Residual rain will linger in western Scotland into Thursday, and areas of very low cloud will persist. High pressure to the east will then dominate into the weekend and beyond, resulting in a sustained period of dry weather for most mountains, with winds from the east or south-east. After a mild spell, temperatures are expected to lower next week. Low level fog common, and banks of low cloud at times coming in from the North Sea. Sunshine best in the west.

Sponsored by
sportscotland
In association with
Mountaineering Council of Scotland Association of Mountaineering Instructions