Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Friday 24th February 2017
Forecast last updated on Thursday 23rd February 2017 at 1:07pm

Today | Saturday | Sunday

Summary for all mountain areas

A lull in the weather as a transient ridge of high pressure crosses Britain. There will be a lull in wind, showers mostly restricted to W & NW Highlands and cloud confined to higher summits. However, deteriorating afternoon western areas: wind strengthening, later snow.

Headline for Snowdonia National Park

Lull in morning (light wind, dry); then deteriorating: windy and snow.

How windy? (On the summits)

Westerly 25-30mph at dawn and again by about dusk. Centred on middle of day, a lull to 20mph. By dusk western summits 35mph; widely across Wales 50mph or more on summits overnight.

Effect of wind on you?

Mostly fairly small. But conditions will deteriorate markedly from about dusk as walking on higher areas becomes difficult.

How Wet?

Rain, snow higher tops, late in day

Risk of one or two snow showers morning. More extensive rain will then spread west into the afternoon. The rain will be on and off, and amount to very little well inland. Snow temporarily higher tops.

Cloud on the hills?

Deteriorating; cloud base dropping

Cloud confined to higher tops most of morning, and into the afternoon many summits well inland cloud free. Will then slowly deteriorate as cloud envelops western hills, from lower slopes up. The cloud will by dusk will increasingly cap higher areas elsewhere.

Chance of cloud free summits?

70%

Sunshine and air clarity?

Sunshine, most widely easternmost Wales morning. Visibility excellent.

How Cold? (at 900m)

-1C; will rise slowly through day.

Freezing Level

650m rising from west toward 900m.

Planning Outlook

All mountain areas of Britain from Saturday 25th February 2017

Continued frequent precipitation and upland gales until Monday. Temperatures will drop below freezing point across the Scottish Highlands later Saturday and on higher summits in England and Wales early next week. Through next week, still precipitation from time to time, but higher areas, even into England and Wales will be frequently sub-freezing. Indeed periods of thaw on the Sottish Munros may well be rare.

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