Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Thursday 19th October 2017
Forecast last updated on Thursday 19th October 2017 at 7:20am

Today | Friday | Saturday

Summary for all mountain areas

A complex picture across the British Isles, with a damp southerly air mass and various fronts drifting slowly northwards. Extensive low cloud covering many hills, with patchy drizzle, or locally persistent rain. Some cloud breaks in far north. Deteriorating later in Wales.

Headline for Snowdonia National Park

Extensive low cloud. A little drizzle. Deteriorating later.

How windy? (On the summits)

Southeasterly 25-35mph, may increase to 40-50mph by evening.

Effect of wind on you?

Walking impeded across higher areas, and local sudden buffeting to lower slopes near & north of major ridges; risk deteriorating toward evening.

How Wet?

Largely dry, but rain setting in later

Residual patches of drizzly rain from overnight will clear to leave largely dry conditions over many hours. However, conditions will likely deteriorate again later in day as widespread rain spreads in.

Cloud on the hills?

Extensive; lifting a little

Covering the hills above 500-700m, or lower early morning; but may break up and lift above 900m for a few hours in middle of the day, especially north of the A5.

Chance of cloud free summits?

10% morning; 30% afternoon.

Sunshine and air clarity?

Rare glimpses of weak sun. Otherwise overcast. Visibility often poor, but may improve in middle of day.

How Cold? (at 900m)


Freezing Level

Above the summits

Planning Outlook

All mountain areas of Britain from Friday 20th October 2017

Late Friday into Saturday, another Atlantic storm threatens widespread heavy rain and gales, especially England & Wales. A changeable outlook continues: south to south-westerly winds dominating into next week, with frequent rain on all western mountains, but the most prolonged falls perhaps focused on England & Wales rather than Scotland. Fairly mild overall; occasional sleet or snow only temporarily on highest tops.

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