Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Warm
Comfortable temperatures on the hills, 12 to 16C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Warm
Comfortable temperatures on the hills, 12 to 16C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
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.