Snowdonia National Park Forecast

Viewing Weather Forecast for Friday 23rd August 2019

Includes all summits in the the northern half of Wales from Plynlimon northwards.

Today | Saturday | Sunday

Forecast last updated on Thursday 22nd August 2019 at 4:35pm

Summary for all mountain areas

Strong to gale force winds across Scottish mountains in the morning, becoming confined to the northwest. Rain in the W/NW Highlands from dawn will fade and pull away northwards. Low cloud and patchy drizzle continues to affect many western hills of Britain, but some breaks tending to form, best toward eastern hills.

Headline for Snowdonia National Park

Blustery western tops. Drizzle and low cloud, improving.

How windy? (On the summits)

Southwest backing southerly; 15 to 25mph, strongest western summits nearest the coast. At times 10-15mph inland across mid-Wales.

Effect of wind on you?

Local buffeting around western summits, mostly small inland.

How Wet? (Precipitation and its impact)

A little drizzle morning west

Patches of fine drizzle western hills in morning. Fading to becoming dry overall.

Cloud on the hills?

Extensive at first, lifting to higher tops.

Cloud fairly extensive across the hills from dawn above 500-700m, lowest in west where for a few hours covering some hills to lower slopes. Bases will gradually lift into the afternoon, and some breaks will form above 800m, soonest and best across hills east/north of the A5.

Chance of cloud free summits?

20% rising to 60% afternoon.

Sunshine?
Air clarity (below cloud)

Starting cloudy and dull, particularly west Wales, locally murky in drizzle. Mostly good visibility east Wales, and may widely improve through day.

How Cold? (at 900m)

10C rising to 13C out of cloud in the afternoon.

Freezing Level

Above the summits

Planning Outlook

All mountain areas of Britain from Saturday 24th August 2019

Southerly winds over the next few days will bring much warmer temperatures than recent weeks, and feeling humid. A few showers may affect western Scottish coasts on Saturday, but most places will be dry through the weekend and Monday, with light winds and sunshine, hazy at times. Many hills often free of low cloud. By Tuesday into midweek, as fronts edge back in from the west, bursts of rain are likely to develop, locally thundery. Southwesterly winds are expected to prevail later in the week, with rain at times, most frequent in W/NW Scotland. Some windy days with possible gales for the Highlands.