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 sunshine. The mountains free of cloud once any early mist patches disperse.
Hot
Heatwave conditions. Very high temperatures, rising to 20C+ on high tops, approaching 30C in some valleys. Beware of heat stroke and dehydration. Carry plenty of liquid.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Click an icon for more information or click here for a key to all icons.
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 sunshine. The mountains free of cloud once any early mist patches disperse.
Hot
Heatwave conditions. Very high temperatures, rising to 20C+ on high tops, approaching 30C in some valleys. Beware of heat stroke and dehydration. Carry plenty of liquid.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 13th August 2026
Last updated
Wed 12th Aug 26 at
4:17PM
Summary for all mountain areas
Exceptionally hot in England and Wales, fire risk remains high. Despite haze and high cloud, beware sunburn and dehydration. Warm too in Scotland. Hill cloud and showery rain affects west Scotland from morning, patches spreading east; rain becomes frequent west Scotland later with heavy bursts.
Headline for Eryri / Snowdonia National Park
Hot sun but hazy/smokey views
How windy? (On the summits)
Southerly 20-30mph in the early morning, strong gusts over high terrain. Soon beginning to ease, trending westerly with some variability, settling near 10-15mph.
Effect of the wind on you?
Blustery in exposure for a few early hours, gusts affecting ease of walking, soon easing to small effects.
How Wet?
No rain expected
Cloud on the hills?
Hills likely cloud-free during daylight
A layer of cloud rests over Cardigan Bay which may begin to push onto low western slopes as night begins to fall.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Mostly sunny, some high cloud around, most likely east. Hazy, smokey views due to fire in south Wales.
How Cold? (at 900m)
20 to 22C much of the day, valley temperatures approaching an unusually hot 30C in east Wales. A slight cooling trend beginning later afternoon.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 14th August 2026
Last updated
Wed 12th Aug 26 at
4:17PM
How windy? (On the summits)
Westerly 10-15mph. Later, shifting north-northwesterly and rapidly strengthening towards 20mph or stronger over tops.
Effect of the wind on you?
Small most of the day, though a rapid rise in speed late in the day will affect comfort of walking.
How Wet?
Patchy rain and drizzle
From dawn, light patchy rain affects many hills with a drizzle on high tops and western hills. Rain will become more frequent with heavy bursts for a few hours, at least.
Cloud on the hills?
Soon extensive
Cloud shrouds high terrain from dawn, and many western slopes, soon spreading widely to at least middle slopes, or lower patches on windward western slopes during rain. Starting to break later in the day.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Soon overcast and dull. Visibility increasingly poor with cloud and rain.
How Cold? (at 900m)
16C lowering to 11C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 15th August 2026
Last updated
Wed 12th Aug 26 at
4:17PM
How windy? (On the summits)
Northerly 20-30mph at dawn, strong gusts over high terrain and downslope southward; easing to 15-20mph with time.
Effect of the wind on you?
Blustery in exposure with considerable buffeting early, tending to ease towards fairly small effects.
How Wet?
A little light rain, fading
In the morning, some patchy light rain drifts onto the hills from the north, drizzly on high terrain in cloud as well. Rain will ease for a dry afternoon.
Cloud on the hills?
Lifting to high summits
Fairly extensive early, particularly northwestern areas; some breaks at varied elevations south and east. Lifting through morning, to just banks over high terrain. Highest summits may see few breaks until later.
Chance of cloud free summits?
Rising to 40%
Sunshine and air clarity?
Largely sunny, some high cloud; cloudier through morning on high terrain. Very good visibility.
How Cold? (at 900m)
9 or 10C.
Freezing Level
Above the summits.
Planning Outlook
Some rain and a fresh northwesterly breeze slips into England and Wales on Friday. Though weekend, high pressure is never far away to the southwest, keeping conditions generally drier and brighter across England and Wales, though a northwesterly flow will bring some cloud to western hills. Scotland is more often cloudy with patchy rain, mostly north and west. Mixed conditions early next week with periods of rain and sunny bursts. High pressure remains present to the southwest of the British Isles, maintaining the possibility of drier brighter days; detail remains uncertain regarding risk of more unsettled weather. Temperatures likely nearer average.