Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Wednesday 25th May 2016
Forecast last updated on Wednesday 25th May 2016 at 3:45pm

Today | Thursday | Friday

Summary for all mountain areas

A drop in temperature, most noticeable western mountains where fine although away from the W & NW Highlands cloudy. Areas of low cloud and occasional rain will shroud eastern mountains, principally later on, particularly Pennines, where rain will increasingly set in.

Headline for Snowdonia National Park

Fairly light wind. Sunshine confined to west will give way.

How windy? (On the summits)

Northeasterly, 20mph, locally 25mph.

Effect of wind on you?

Fairly small.

How Wet?

Rain not expected until evening

Risk rain in the evening, most likely only Snowdon range.

Cloud on the hills?

Summits extensively cloud free; will form toward evening

Cloud above about 700m Carnedd plateau and eastern mountains until mid-morning, when base will rise to 800 or 900m. Otherwise, cloud confined above 800m, before mostly lifting above 900 or 1000m.

Chance of cloud free summits?

90%, dropping from east to 20% toward evening.

Sunshine and air clarity?

Sunshine mostly confined to western hills south of Snowdon, before cloud thickens across region later in day. Excellent visibility although will become increasingly hazy from east.

How Cold? (at 900m)

1 rising to 3 to 5C, warmest western summits south of Snowdon.

Freezing Level

Above the summits. Risk ground frost some valleys/corries at dawn.

Planning Outlook

All mountain areas of Britain from Thursday 26th May 2016

A long period of east or northeasterly winds over the next week or two. Frequently dry, particularly western mountains - indeed there may be no rain at all over the NW Highlands where conditions will become very dry underfoot. Elsewhere, remnants of sometimes thundery rain will curve in from the Continent from time to time, bringing with it large sheets of very low cloud which will never clear some eastern mountains over several days.

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