Snowdonia National Park Forecast

Viewing Weather Forecast for Wednesday 26th September 2018

Also includes higher summits south to Plynlimon.

Today | Thursday | Friday

Forecast last updated on Tuesday 25th September 2018 at 3:08pm

Summary for all mountain areas

Upland gales Cumbria northwards, increasingly severe northwards into the Scottish Highlands. Occasional rain, although the rain persistent W/NW Highlands. Fine with light winds Peak District and Wales. Many summits from Snowdon range northwards cloud covered all day.

Headline for Snowdonia National Park

Blustery and foggy Snowdon range. Cloud base slowly rising.

How windy? (On the summits)

Westerly 15 to 20mph mid-Wales to 25 to locally 35mph Snowdon range.

Effect of wind on you?

Walking arduous some areas Snowdon range (not necessarily on highest tops). Small mid Wales.

How Wet? (Precipitation and its impact)

Rain very unlikely

Low risk isolated light rain Snowdon range.

Cloud on the hills?

Mostly confined to Snowdon range

Snowdon range: hills extensively cloud covered above 500 to 750m. A few breaks to 900m, although the trend will be for the base to rise slowly. Elsewhere: Cloud will mostly form above the highest summits, although until afternoon, higher tops in west Wales often covered.

Chance of cloud free summits?

20% Snowdon range; 20% rising to 70% elsewhere.

Air clarity (below cloud)

Sunshine, mostly south of the Snowdon range (may tend to extend slowly northwards through the day). Very good visibility although a haze.

How Cold? (at 900m)


Freezing Level

Above the summits.

Planning Outlook

All mountain areas of Britain from Thursday 27th September 2018

High pressure, generally centred over or near S Britain will bring extensively dry conditions over the next 10 days. However, around the periphery of the high in Scotland, intermittently windy (particularly north), and weakening fronts will bring occasional rain southwards. Higher Munros often close to freezing point, and slight frost many valleys some nights.