Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Clear
Excellent or superb visibility, no navigation issues.
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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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Clear
Excellent or superb visibility, no navigation issues.
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
Thursday 6th August 2026
Last updated
Wed 5th Aug 26 at
3:58PM
Summary for all mountain areas
Blustery with showers into Scotland and northern England in the morning; wind and rain easing, sun breaking out with time, mild high temperatures. Risk more frequent showers and strong wind in the Peak District through morning, improving afternoon. Rare early showers in Wales, cloud clearing most hills.
Headline for Eryri / Snowdonia National Park
Blustery early, easing; few early showers, then sun breaks
How windy? (On the summits)
Northwesterly 30-35mph at dawn, gusting 40mph over high tops or stronger towards east Wales. Soon beginning to ease with a slight westerly shift, speeds to 10-20mph most of the day.
Effect of the wind on you?
Becoming fairly small, but blustery and feeling rather cool in the morning, affecting ease of walking in exposed spots.
How Wet?
Early light showers fade
Light showers from dawn into early morning drifting from the northwest, tending to fade to become dry, only a remote chance of odd light showers from late morning onward.
Cloud on the hills?
Lifting and breaking above tops
Cloud banks above 700-800m in the morning, most common toward west, particularly facing Anglesey. Lifting to higher tops, some variability around early showers, then largely clearing the hills, only patches on highest summits.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Patchwork of cloud and sun, more often sunny later but some thin high cloud approaching too. Visibility very good.
How Cold? (at 900m)
7C rising to 9C afternoon. Feeling close to freezing if exposed to early wind on tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 7th August 2026
Last updated
Wed 5th Aug 26 at
3:58PM
How windy? (On the summits)
West-southwesterly 10-15mph, sometimes less.
Effect of the wind on you?
Small.
How Wet?
Early drizzle
Drizzle on high tops and western slopes nearest Cardigan Bay for a few early hours, this soon fading for dry hills.
Cloud on the hills?
Lifting to summits
Most high terrain shrouded early with varied lower patchy banks, most extensive west with banks to 500m. Cloud lifts to largely just caps over high summits afternoon, some clear windows appearing.
Chance of cloud free summits?
Rising to 60%
Sunshine and air clarity?
Patchy cloud, breaks increasingly forming for extended sunny windows. Very good visibility.
How Cold? (at 900m)
8C rising to 11C, staying elevated into night.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 8th August 2026
Last updated
Wed 5th Aug 26 at
3:58PM
How windy? (On the summits)
South-southwesterly 20-25mph, gusts over summits to 30-35mph, and sustained speeds tending to strengthen later.
Effect of the wind on you?
Fairly small in places, but buffeting gusts over summits likely all day, and later more widely strenuous in exposure.
How Wet?
Often dry, occasional patchy rain
Occasional rain drifting onto the hills from the southwest, plenty of extended dry windows. A rising chance of more frequent rain later.
Cloud on the hills?
Rising chance of summit caps
Patchy banks here and there early, mostly western slopes facing coasts; lifting and fading for clear hills. With time, a rising chance of caps returning to summits if rain arrives.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Often sunny, weakened by high cloud and sometimes thicker cloud shrouds the sun. Very good visibility.
How Cold? (at 900m)
9C rising to 12C, little drop into night.
Freezing Level
Above the summits.
Planning Outlook
Westerly winds prevail into the weekend and further weather fronts will come in off the Atlantic, bringing rain and low cloud to most mountains. Saturday into Sunday in particular will see extensive cloud and heavy rain across Scotland with strong wind, bands of rain passing to the south and east into England and Wales. A ridge of high pressure returns early next week for warmer temperatures and clearer hills, though western Scotland likely remains fairly cloudy with some drizzle on the high tops. Following this high pressure, west-southwesterly flow returns and a series of low pressure systems will pass west-to-east across the British Isles with periods of strong wind (sometimes gale-force), rain, and low cloud, western hill groups aways most affected. Unsettled conditions likely persist into next weekend.