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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 14th August 2026
Last updated
Thu 13th Aug 26 at
4:08PM
Summary for all mountain areas
A band of rain over central Scotland in the morning sweeps into England and Wales; some heavy bursts with extensive cloud. Rain eases afternoon, to patches over Wales and the Peak District. Drizzle and light rain follows in west Scotland, little reaching eastward where high cloud breaks form.
Headline for Eryri / Snowdonia National Park
Cloud fills in extensively, a period of frequent rain
How windy? (On the summits)
Westerly 10-15mph. Later, shifting north-northwesterly and rapidly strengthening towards 20mph or stronger over tops and may further strengthen overnight.
Effect of the wind on you?
Small most of the day, though a notable rise in speed later will affect comfort of walking on high tops.
How Wet?
Patchy rain, some drizzle; a period of heavier falls
From dawn, light patchy rain affects some hills with a drizzle on high tops and western hills. Rain will become more frequent with heavy bursts for a few hours, at least, tending to break into lighter patches again later.
Cloud on the hills?
Soon extensive
Cloud shrouds high terrain from dawn, and many western slopes, spreading widely to at least middle slopes, or lower patches on windward western slopes during rain. May begin to break later in the day, but perhaps only towards sunset.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Soon overcast and dull. Visibility increasingly poor with cloud and rain.
How Cold? (at 900m)
16C, gradually lowering, notably afternoon and finishing near 11 or 12C, further lowering overnight.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 15th August 2026
Last updated
Thu 13th Aug 26 at
4:08PM
How windy? (On the summits)
Northerly 20-25mph at dawn, strong gusts over high terrain and downslope southward; easing to 15-20mph with time.
Effect of the wind on you?
Blustery in exposure with considerable buffeting early, tending to ease towards fairly small effects.
How Wet?
A little light rain, fading
In the morning, some spotty light rain drifts onto the hills from the north, drizzly on high terrain in cloud as well. Rain will ease for a dry afternoon.
Cloud on the hills?
Lifting to high summits
Fairly extensive early, particularly northwestern areas; some breaks at varied elevations south and east. Lifting through morning, to just banks over high terrain. Highest summits may see few breaks until later.
Chance of cloud free summits?
Rising to 40%
Sunshine and air clarity?
Largely sunny, some high cloud; cloudier through morning on high terrain. Very good visibility.
How Cold? (at 900m)
9 or 10C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 16th August 2026
Last updated
Thu 13th Aug 26 at
4:08PM
How windy? (On the summits)
Generally northwesterly but some variability, 10-15mph.
Effect of the wind on you?
Mostly small.
How Wet?
Little expected
A few odd patches of rain may drift onto the hills, generally light in nature and many hills often dry; small chance of a heavier fall.
Cloud on the hills?
Lifting to summits, and likely above
Banks of cloud at varied heights in the morning, lifting towards high terrain, and likely off the summits for extended periods. Broader layers may cover high terrain should rain occur.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Often sunny though often weakened by high cloud. Very good visibility.
How Cold? (at 900m)
9 or 10C, only slight rise, mainly east.
Freezing Level
Above the summits.
Planning Outlook
Though the weekend, high pressure is never far away to the southwest, keeping conditions generally drier and brighter across England and Wales, though a northwesterly flow will bring some cloud to western hills. Scotland is more often cloudy with patchy rain, mostly north and west, and a rising risk of cloud and some bursts of rain more widely into Sunday with fresher air. Windier and wetter conditions are indicated next week, though day-by-day detail is currently uncertain. Monday sees a rising risk of strengthening wind and rain, at least in northern areas, then a blustery northwesterly wind draws fresher air and showers more widely through midweek; some drier, brighter windows to the east. Staying mixed into next weekend.