Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Tuesday 20th February 2018
Forecast last updated on Monday 19th February 2018 at 2:22pm

Summary for all mountain areas

High pressure builds in from the west, and a weak front which crosses the country in the early hours moves away eastwards. A largely dry and bright day, with cloud breaks to many higher tops. Windy in the morning, up to gale force for the Pennines and Wales, but tending to ease. Temperatures sub-zero again on the mountains.

Headline for Snowdonia National Park

Wind up to gale force; easing. Generally dry, rare flurries.

How windy? (On the summits)

Northerly, 35-40mph early morning, tending to ease slightly through day, toward 25mph by afternoon.

Effect of wind on you?

Buffeting and significant wind chill higher areas in morning; walking may be arduous for a few hours, but conditions improving slowly.

How Wet?

Dry overall

Rare brief snow flurries (rain lower slopes) may come in from the Irish Sea in the morning, but amounting to very little.

Cloud on the hills?

May linger higher tops

Banks of cloud below 600-700m in the morning, and may linger northern areas for several hours. However, cloud base lifting to 900m or above. High tops may clear by afternoon.

Chance of cloud free summits?

40% morning; 60% afternoon.

Sunshine and air clarity?

Generally bright with frequently sunny skies. Areas north of the A5 may hold onto cloudier skies. Visibility very good.

How Cold? (at 900m)

-1C Feeling close to -15C where exposed to strongest wind in morning.

Freezing Level

Around 800m.

Planning Outlook

All mountain areas of Britain from Wednesday 21st February 2018

High pressure which briefly resides across Britain will become centred strongly over Scandinavia later this week, paving the way for very cold easterly winds to develop toward the end of February. Substantially dry conditions for the rest of this week, and most likely through the weekend. A risk of snow developing on eastern hills as the easterly winds arrive. After a brief lift above freezing at the start of this week, temperatures will be below freezing on the mountains for the foreseeable future, so the current snow-pack will substantially remain in place; probably well into March.

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