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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Friday 8th May 2026
Last updated
Thu 7th May 26 at
4:25PM
Summary for all mountain areas
Near freezing all day on higher Scottish mountains, considerable chill factor in the north with brisk winds, though tending to ease. A few showers, snow flurries on Scottish tops, but a fair amount of dry weather for the Highlands. Lighter winds England, Wales & southern Scotland, localised heavy bursts of rain forming.
Headline for Eryri / Snowdonia National Park
Wind mostly light. Local heavy showers form.
How windy? (On the summits)
South-southeasterly 10-15mph, often less and direction varying, occasional stronger gusts near showers.
Effect of the wind on you?
Mostly small.
How Wet?
Showers, heavier afternoon-evening, chance thunder
Scattered showers most of the day, dry periods; a rising risk of locally heavy showers in the afternoon, moving around slowly onward into evening. Risk of isolated thunder. Some places escape dry.
Cloud on the hills?
Lifting to summits, clearing for a time
Fog at various heights in the morning, but well-broken below 600m. Lifting through morning to 800m or higher, some breaks to summits, but then a risk of more often capping summits if heavier afternoon showers occur.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Largely cloudy, glimpses of sun. Variable visibility, very good during drier periods, locally very poor if heavier showers occur.
How Cold? (at 900m)
5C rising to 8C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 9th May 2026
Last updated
Thu 7th May 26 at
4:25PM
How windy? (On the summits)
Northeasterly 20 to 25mph, risk 30mph in places, gusty around higher mountains.
Effect of the wind on you?
Feeling blustery and rather cool, more noticeably gusty around some tops and ridges, affecting balance in exposure.
How Wet?
Possible late showers
Much of day may well remain dry, some spots of rain possible from thickening high cloud. Later in daytime, chance of localised heavy showers forming, possibly thundery.
Cloud on the hills?
Mostly little, risk cloud northern tops
Some patchy cloud banks forming over higher slopes, most likely toward the north and east of the region, greatest risk on Carneddau. Western hills more often clear, but patches if showers form.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Sun may be often weak through a veil of high cloud. Visibility very good.
How Cold? (at 900m)
5 to 7C. Feeling like 0C or just below if exposed to wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 10th May 2026
Last updated
Thu 7th May 26 at
4:25PM
How windy? (On the summits)
Northeasterly 25 to 30mph and notably gusty particularly morning; speeds may lessen a little with time.
Effect of the wind on you?
Blustery with considerable wind chill at least in morning. Gusty spots affect ease of walking and balance on ridges.
How Wet?
Rain unlikely
Chance of brief spots of drizzle or light rain early in the day, mainly north and eastern hills, otherwise dry.
Cloud on the hills?
Local banks clearing
Cloud banks mostly drifting over east and northern tops in the morning, tending to lift higher and break above most or all tops.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Fairly cloudy in east in morning, some sunny breaks toward the west coast; broken cloud and sun afternoon. Visibility very good or excellent.
How Cold? (at 900m)
2C rising to 5C afternoon. Feeling as cold as -8C directly in the wind in morning, -3C afternoon.
Freezing Level
Above the summits.
Planning Outlook
A chilly outlook into mid-May, with higher Scottish mountains staying near or often below freezing point as northwesterly air prevails. Higher tops in England and Wales also dropping intermittently to freezing point. Wind-speed varying day-to-day, but prepare for often considerable chill-factor on all mountains. Some frost overnight into valleys when skies are clear. Broadly showery weather over the next 10-day period, plus some fronts bringing persistent rain mostly to northwestern Scotland, often falling as snow on mountain tops, sometimes to below 600m. Drier intervals too, some days with fewer showers and broken cloud lifting above the summits, varying locally day-to-day.