Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
Clear
Excellent or superb visibility, no navigation issues.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
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.
Clear
Excellent or superb visibility, no navigation issues.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 11th August 2026
Last updated
Mon 10th Aug 26 at
1:18PM
Summary for all mountain areas
Fine and widely sunny - albeit patches of high thin cloud. In Scotland cloudy at times near west coast, whilst centred on the SE Highlands, persistent low cloud in the morning. Becoming very warm England and Wales.
Headline for Eryri / Snowdonia National Park
Dry, warm and sunny.
How windy? (On the summits)
Southerly 10 or 15mph.
Effect of the wind on you?
Negligible
How Wet?
Rain not expected
Cloud on the hills?
Very unlikely
Chance of cloud free summits?
Almost certain
Sunshine and air clarity?
More or less unbroken sunshine. Excellent or superb visibility - haze may develop east Wales.
How Cold? (at 900m)
11C rising to 21C
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 12th August 2026
Last updated
Mon 10th Aug 26 at
1:18PM
How windy? (On the summits)
Southerly 10-15mph.
Effect of the wind on you?
Negligible
How Wet?
Rain very unlikely
Cloud on the hills?
Little if any
Chance of cloud free summits?
Almost certain
Sunshine and air clarity?
Extensive sunshine. Good visibility although a haze.
How Cold? (at 900m)
14 rising to 23C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 13th August 2026
Last updated
Mon 10th Aug 26 at
1:18PM
How windy? (On the summits)
Southerly between 15 and perhaps 20mph.
Effect of the wind on you?
Small
How Wet?
Substantially or completely dry
Here and there chance of a burst of rain - perhaps just a few spots, but possibly a heavy burst with a rumble of thunder.
Cloud on the hills?
Little if any
Chance of cloud free summits?
90%
Sunshine and air clarity?
Periods of sunshine - sometimes through high level cloud. Hazy.
How Cold? (at 900m)
Reaching an unusually warm 22 to perhaps 27C - the highest temperatures on easternmost summits.
Freezing Level
Above the summits.
Planning Outlook
Chance of bursts of rain, possibly locally thundery on Wednesday NW England northwards, with further occasional rain (and low cloud) later in the week, mainly across the W & NW Highlands. The almost completely dry and warm weather will persist elsewhere - very hot indeed Thursday. Underfoot conditions will remain exceptionally dry. There may be little change in the pattern into next week - although there is uncertainty in the track of oncoming rain on low cloud at the end of the weekend.