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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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 7th August 2026
Last updated
Thu 6th Aug 26 at
4:17PM
Summary for all mountain areas
Rain in the Scottish Highlands, persistent central/west areas; windy too, gales developing over summits. Some early rain in England, cloud covering high terrain, improving for frequent sun and minimal hill cloud. Light wind and mostly sunny Wales, just some early cloud and dampness high Snowdonia terrain.
Headline for Eryri / Snowdonia National Park
Early hill cloud lifts to high tops with breaks; light wind
How windy? (On the summits)
West-southwesterly 10-15mph, sometimes less.
Effect of the wind on you?
Small.
How Wet?
A little morning drizzle
Drizzly areas on high terrain and western slopes nearest Cardigan Bay during the morning, fading for a dry afternoon.
Cloud on the hills?
Lifting to summits
Most high terrain shrouded early with varied lower patchy banks, most extensive west with banks to 500m. Cloud lifts to largely just caps over high summits afternoon, clear windows appearing with time.
Chance of cloud free summits?
Rising to 70%
Sunshine and air clarity?
Patchy cloud, breaks increasingly forming for extended sunny windows later. Very good visibility.
How Cold? (at 900m)
8C rising to 10 or 11C, staying elevated into night.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 8th August 2026
Last updated
Thu 6th Aug 26 at
4:17PM
How windy? (On the summits)
South-southwesterly 20-25mph, gusts over summits to 30-35mph, and sustained speeds tending to strengthen later.
Effect of the wind on you?
Fairly small in places, but buffeting gusts over summits likely all day, and later more widely strenuous in exposure.
How Wet?
Substantially dry
Occasional rain drifting onto the hills from the southwest, but generally light and spotty, many hills largely dry most or all of daylight.
Cloud on the hills?
Rising chance of summit caps
Patchy banks here and there early, mostly western slopes facing coasts; lifting and fading for clear hills. With time, a rising chance of caps returning to summits but continue to break off tops as well.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Often sunny, weakened by high cloud and sometimes thicker cloud shrouds the sun. Very good visibility.
How Cold? (at 900m)
9C rising to 11 or 12C, little drop into night.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 9th August 2026
Last updated
Thu 6th Aug 26 at
4:17PM
How windy? (On the summits)
Southwesterly 30-35mph, shifting westerly and lessening, finishing towards 15-20mph.
Effect of the wind on you?
Strenuous walking in exposure early in the day, easing to fairly small effects.
How Wet?
Patchy rain, chance extended falls
Patchy rain affecting the mountains much of the day, a chance of extended falls coming and going with some heavy bursts but confidence is currently low.
Cloud on the hills?
Varied, mostly high terrain
High summits may be shrouded most of the day. Bases will vary, shrouding high terrain during rain with local bases to middle slopes where falls are heaviest, but some higher breaks may occur too.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Glimpses of sunshine. Good visibility, deteriorating in rain.
How Cold? (at 900m)
10 or 11C, may locally rise slightly.
Freezing Level
Above the summits.
Planning Outlook
Westerly winds prevail into the weekend: Saturday will see extensive cloud and heavy rain develop across Scotland with gales; bands of rain passing to the south and east into England and Wales through Sunday with showers in Scotland. A ridge of high pressure early next week brings warmer temperatures and clearer hills, though western areas likely remain fairly cloudy with some drizzle on the high tops. Westerly flow returns through mid-week and a series of low pressure systems will pass west-to-east across the country with periods of strong wind (sometimes gales), rain, and low cloud, western hill groups always most affected. Mild-to-warm temperatures and sometimes quite humid. Changeable conditions persist into next weekend.