Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Friday 17th August 2018
Forecast last updated on Thursday 16th August 2018 at 3:14pm

Tomorrow | Saturday | Sunday

How windy? (On the summits)

Southwesterly 20mph, gradually strengthening middle of day and afternoon to 30 or locally 35mph.

Effect of wind on you?

Will increasingly impede walking across higher areas.

How Wet? (Precipitation and its impact)

A little drizzly rain western hills

Isolated brief showers morning. Then westernmost hills will have patches of fine drizzle, whilst elsewhere very likely dry.

Cloud on the hills?

Almost blanket fog spreading east

Cloud will frequently shroud most hills throughout the day, the base lowering to form from lower slopes up during the afternoon. Well inland, cloud base higher. Summits in easternmost Wales may be clear of cloud for many hours, before the fog forms increasingly above 550 to 750m.

Chance of cloud free summits?

Dropping to less than 10% much of region. 80%, later 30% E Wales.

Sunshine?
Air clarity (below cloud)

Generally overcast, but rare glimpses of sun east Wales. Visibility mostly very good, or in east Wales excellent.

How Cold? (at 900m)

7 rising to 11C

Freezing Level

Above the summits

Planning Outlook

All mountain areas of Britain from Saturday 18th August 2018

Mixed conditions will continue next week. Winds will remain generally westerly. There will be rain from time to time, although away from western mountains in Scotland, total rainfall will be fairly small. Low cloud will remain frequent, concentrated on more western mountains.

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