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.
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
Saturday 11th July 2026
Last updated
Fri 10th Jul 26 at
4:17PM
Summary for all mountain areas
Fairly cloudy Scottish highlands, drizzly tops east where a risk of thundery showers; drier west, local bright breaks. A rising risk of heavy/thundery showers forming over Southern Uplands. Very warm and sunny in England, but high cloud and a risk of showers far north later. Extensive hot sunshine for Wales.
Headline for Eryri / Snowdonia National Park
Extensive hot sunshine, risk sunburn and dehydration
How windy? (On the summits)
At dawn, variable less than 10mph over Eryri/Snowdonia NP. Further south, easterly 10mph, gradually trending east-northeasterly widely and strengthening, finishing at 15-20mph.
Effect of the wind on you?
Small most of the day, but the breeze will pick up over the tops later in the day.
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 around in the morning and afternoon. Some early haze but visibility improves to very good.
How Cold? (at 900m)
19C rising to 22C, warmest south and east, a degree higher towards Penygader (valleys approaching 27C, warmer east Wales).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 12th July 2026
Last updated
Fri 10th Jul 26 at
4:17PM
How windy? (On the summits)
Easterly 25-35mph morning and quite gusty. Easing tendency afternoon, mostly 20-30mph, but staying gusty.
Effect of the wind on you?
Strenuous walking over tops at times, particularly early with buffeting gusts starting to affect stability.
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, a few banks into Eryri/Snowdonia NP as well, but 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, mildest over Carneddau; a degree warmer near Penygader (where valley temperatures approach 26C).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 13th July 2026
Last updated
Fri 10th Jul 26 at
4:17PM
How windy? (On the summits)
Easterly 20-25mph. Quite gusty over tops, pushing downslope early with max speeds approaching 35mph at times.
Effect of the wind on you?
Comfort of walking affected on tops, more strenuous early with frequent nuisance gusts.
How Wet?
No rain expected
Cloud on the hills?
Likely none
A few ribbons of cloud affecting some middle slopes towards east Wales, these very sparse and soon thinning and dissipating for clear hills.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Extensive sunshine. Good visibility, a light haze.
How Cold? (at 900m)
16C rising to 19C, western valleys approaching 27C; less humid than recent days.
Freezing Level
Above the summits.
Planning Outlook
Staying very warm late weekend into next week. High pressure north of the country keeps the skies mostly clear and facilitates an an easterly flow, pushing the warmest temperatures to western hill groups. Northeastern areas will see early sea fog under the high pressure, this dissipating in the sun through morning. Scottish highlands seeing temperatures often rise into the mid-teens, valley temperatures to the 20s west; warmest Wales where hill temperatures often to 20C or higher. A fairly sustained breeze most of the week in England and Wales, at times stronger and quite gusty. Low pressure south of the country may push cloud and showers into Wales, though confidence remains low, and could remain largely dry. Detail uncertain later next week, but a milder northerly flow may begin to establish.