Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
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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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 22nd August 2026
Last updated
Fri 21st Aug 26 at
3:54PM
Summary for all mountain areas
Cloud clings to northwest Scotland slopes, a little drizzle. Cloud clears most other Munros, varied banks over highest summits. Rare showers in England but most hills dry, morning cloud lifting off summits with patchy sunshine. Early showers in north and west Wales will clear for patchy sun as well.
Headline for Eryri / Snowdonia National Park
Early showers fade for patchy sun; varied cloud on highest tops
How windy? (On the summits)
North-northwesterly 10-15mph, gusts beginning to form on high terrain.
Effect of the wind on you?
Mostly small, some nuisance gusts over high tops.
How Wet?
Early showery rain fades
Showery rain over the hills in the morning, a few local heavy bursts will come and go. Showers tending to break, hills becoming entirely dry with time.
Cloud on the hills?
Lifting to summits with breaks
Fairly extensive over high terrain in the morning with lower patches, to lower northern slopes where sheltered. Cloud lifts to summit height, many summits clearing afternoon; highest summits to the north and Snowdon may be more regularly capped.
Chance of cloud free summits?
Rising to 60%
Sunshine and air clarity?
Patchwork of cloud and sun, cloud tending to fade later for a bright sunset. Excellent visibility.
How Cold? (at 900m)
7 to 9C, mildest to the south and east.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 23rd August 2026
Last updated
Fri 21st Aug 26 at
3:54PM
How windy? (On the summits)
Variable mostly less than 10mph, some upslope breezes forming.
Effect of the wind on you?
Negligible.
How Wet?
Likely none
A little fine drizzle in cloud on northern slopes in the early hours, otherwise dry.
Cloud on the hills?
Rising to high summits
Banks at varied heights in the morning, including in valleys; clear windows between cloud layers (possibly clear summits). Cloud will lift towards summit height, many hills entirely clearing, but highest summits may be variably capped.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Often sunny, some fair weather cloud around. Very good visibility.
How Cold? (at 900m)
7C rising to 10 to 12C, warmest towards mid-Wales.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 24th August 2026
Last updated
Fri 21st Aug 26 at
3:54PM
How windy? (On the summits)
Southeasterly 10-25mph: trending from low to high speeds through the day, further rising overnight.
Effect of the wind on you?
Mostly small, but the breeze notably picks up in exposure through the day.
How Wet?
No rain expected
Cloud on the hills?
Little or none
A little patchy mist on low slopes in the morning, soon lifting and dissipating for clear hills.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Mostly sunny, some thin high cloud builds with time. Good visibility but some haze around.
How Cold? (at 900m)
10 to 12C.
Freezing Level
Above the summits.
Planning Outlook
A core of high pressure drifts over the country on Sunday, bringing light and varied wind, dry weather, and minimal hill cloud fairly widely. Northwest Scotland will see a westerly breeze with a little drizzle and lingering hill cloud. It will feel warm in England and Wales in the sunshine, but fair weather cloud will tend to build in the afternoon. Monday is settled too, but high pressure slips away to the northwest, facilitating a southeasterly wind into Wales, later more widely. Tuesday sees a return of low pressure from the south: temperatures will rise and patchy rain will increasingly spread northward with some local stronger wind. Conditions likely continue to unsettle as next weekend approaches with bands of heavy rain forming, varied conditions continuing through the weekend, and likely staying warm and somewhat humid.