Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday'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.
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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 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
Friday 10th July 2026
Last updated
Thu 9th Jul 26 at
3:58PM
Summary for all mountain areas
Hot sunshine persists across England, Wales, and southern Scotland; valley temperatures of 30C+. Starting bright and becoming very warm most of Scottish Highlands. Rain from Lochaber northward, later moving east with heavy thundery bursts forming over central/east highlands into evening.
Headline for Eryri / Snowdonia National Park
Hot sunshine; fair weather cloud builds, small risk late spotty rain
How windy? (On the summits)
Generally southeasterly but variable, 10-15mph. Sustained speeds will trend lower, trending southerly, but variable gusts increasingly common through afternoon.
Effect of the wind on you?
Small, some nuisance gustiness forming afternoon.
How Wet?
Entirely dry most or all day
Late in the afternoon, small chance of an isolated burst of rain; most hills remain entirely dry.
Cloud on the hills?
Hills soon clear
A dawn, some sea fog drifts towards low slopes of northern Eryri/Snowdonia NP, this soon burning back for clear hills.
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Strong sunshine, some thin high cloud, fair weather cloud building afternoon. Visibility good especially west, hazier east and north.
How Cold? (at 900m)
19C at dawn, rising to 22 to 23C, warmest on hills furthest from the sea; sheltered sunny valleys will approach 30C. Rather humid especially in west.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 11th July 2026
Last updated
Thu 9th Jul 26 at
3:58PM
How windy? (On the summits)
Generally easterly 10-15mph, though variable and lower speeds at times. A strengthening trend into nighttime.
Effect of the wind on you?
Small.
How Wet?
No rain expected
Cloud on the hills?
Hills clear
Chance of cloud free summits?
Nearly certain
Sunshine and air clarity?
Extensive sunshine, some thin high cloud, patchy fair weather cloud building afternoon. Very good visibility.
How Cold? (at 900m)
19 to 21C, or a degree higher towards Penygader (valleys approaching 26C, or warmer east Wales).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 12th July 2026
Last updated
Thu 9th Jul 26 at
3:58PM
How windy? (On the summits)
Easterly 15-25mph, stronger gusts over tops at times, as well as downslope early, reaching 35mph.
Effect of the wind on you?
Often fairly small, but ease of walking becoming affected on high exposed terrain.
How Wet?
Likely dry
Small chance of some patchy rain drifting onto northern slopes in the morning, but the hills more likely entirely dry.
Cloud on the hills?
Hills soon clear
Scattered ribbons of cloud on east Wales slopes between 500-800m, these soon thinning and dissipating.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Mostly sunny, some thin high cloud. Good visibility, a light haze.
How Cold? (at 900m)
15 to 17C, a degree warmer towards Penygader (where valley temperatures will approach 26C).
Freezing Level
Above the summits.
Planning Outlook
Staying warm in Scotland, hot for England and Wales into the weekend. High pressure shifts northward, facilitating a strengthening easterly wind across most areas. Some lingering cloud and rain over the Scottish Highlands Saturday with some risk of heavier thundery bursts on Saturday morning in the east. The weekend is likely dry across England and Wales with fairly extensive sun, some sea fog increasingly affecting northeastern hill groups later weekend. Easterly wind persists next week, sometimes quite strong England and Wales. Mostly sunny and very warm, including Scottish Highlands. Low pressure south of the country starts pushing showers into Wales, some heavy and thundery, though confidence is low. Detail increasing uncertain later next week, but Scotland likely stays dry.