Eryri / Snowdonia National Park

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

Today's Forecast

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Click here to download the latest PDF Last Updated Tue 17th Jun 25 at 4:00PM
View our detailed version Last Updated Tue 17th Jun 25 at 4:00PM

Viewing Forecast For

Eryri / Snowdonia National Park
Wednesday 18th June 2025
Last updated Tue 17th Jun 25 at 4:00PM

Summary for all mountain areas

West to southwest breezes will feel cool over Scottish mountains, strongest toward the north. Cloud will be drawn onto western hills, some drizzly rain or brief showers. Higher cloud eastwards, often above tops. England & Wales dry and mostly sunny, warmest south.

Headline for Eryri / Snowdonia National Park

Patchy cloud banks clear, then mostly sunny; light winds.

How windy? (On the summits)

Westerly 10 to 15mph.

Effect of the wind on you?

Small

How Wet?

No rain

Cloud on the hills?

Early cloud dispersing

Patchy cloud banks in morning, some fog into valleys inland too, high tops likely above cloud from dawn. Patches tending to lift upslope, then above hills or largely dispersing. An odd fog patch may linger near Llyn peninsula.

Chance of cloud free summits?

80% rising above 90%

Sunshine and air clarity?

Mostly sunny, some fair-weather cloud. Visibility very good, but misty some lower slopes inland at first.

How Cold? (at 900m)

10C rising to 14C.

Freezing Level

Above the summits

Viewing Forecast For

Eryri / Snowdonia National Park
Thursday 19th June 2025
Last updated Tue 17th Jun 25 at 4:00PM

How windy? (On the summits)

Southeasterly, 10 to 15mph, possibly 20mph west coastal slopes.

Effect of the wind on you?

Mostly small

How Wet?

No rain expected

Cloud on the hills?

Not expected

Chance of cloud free summits?

Above 90%

Sunshine and air clarity?

Mostly sunny. Visibility excellent, some haze may develop.

How Cold? (at 900m)

Rising from 14 to 18C, then only marginal drop into evening and night.

Freezing Level

Above the summits

Viewing Forecast For

Eryri / Snowdonia National Park
Friday 20th June 2025
Last updated Tue 17th Jun 25 at 4:00PM

How windy? (On the summits)

Southeasterly 15 to 25mph, gusty in places around higher slopes and ridges.

Effect of the wind on you?

Fairly small, but starting to affect comfortable walking and balance some exposed higher areas.

How Wet?

Rain not expected

Cloud on the hills?

None expected

Chance of cloud free summits?

Above 90%

Sunshine and air clarity?

Sunshine and high cloud, which may sometimes obscure the sun. Visibility good, some haze.

How Cold? (at 900m)

16C from dawn, rising to 18C.

Freezing Level

Above the summits

Planning Outlook

High pressure centred to the east draws very warm air in on southerly breezes through the rest of this week. Dry conditions, sunshine and fair-weather cloud, some patchy coastal cloud at times in west, locally gustier winds too. A more uncertain outlook into the weekend and early next week, a good deal of fine and warm weather possible, but risk of some rain or showery bursts at times.