Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
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.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
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.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 26th March 2026
Last updated
Wed 25th Mar 26 at
4:19PM
Summary for all mountain areas
A sunny start, frosty in England and Scotland; freezing levels at middle heights in Wales. Some snow showers north and west Scotland early. High cloud builds from the west; patchy snow and rain arrive afternoon, spread east, and increase in frequency into night. Rain increasingly to higher slopes as temperature rises.
Headline for Eryri / Snowdonia National Park
Largely dry and bright, high cloud builds, some rain later
How windy? (On the summits)
North-northwesterly 15-25mph early, some gustiness, shifting westerly and easing to 10-20mph. Restrengthening overnight.
Effect of the wind on you?
Fairly small, some early gustiness may be a nuisance on high exposed slopes.
How Wet?
Patchy rain arrives afternoon into evening
A few early snow showers affecting the Snowdon group and towards Carneddau, soon fading for several dry hours. Through afternoon, some light patchy snow flurries/rain possible here and there, amounting to little. Increasing in frequency into evening, rain to the summits.
Cloud on the hills?
Mostly just high terrain, some variability, lowering later
At dawn, cloud banks on the hills at various heights, most extensive on north and western hill groups. Cloud soon lifts to banks affecting terrain above 800-900m, occasional summit breaks. As evening approaches, cloud merges into a layer over high terrain, gradually lowering, approaching 500m or lower after nightfall.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Bright sunshine in the morning, gradually weakened by increasing cloud. Excellent visibility.
How Cold? (at 900m)
-2C, rising towards 0C afternoon, then a sharp rise evening into night, as high as 5C. Feeling like -10 to -13C in early wind.
Freezing Level
600-700m, some local lower frosts in sheltered areas, particularly east. Gradually lifting, reaching the summits by dusk, further rising overnight.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 27th March 2026
Last updated
Wed 25th Mar 26 at
4:19PM
How windy? (On the summits)
Westerly 20-30mph, notable gusts over high terrain. A northwesterly shift through afternoon.
Effect of the wind on you?
Walking impeded with buffeting gusts; extra effort to maintain balance on exposed ridges. Feeling chilly later.
How Wet?
Morning rain, drier afternoon likely
Often raining through morning, occasional heavy falls mostly western slopes. Rain breaks for a dry afternoon, small chance an odd showers onto western slopes towards Cardigan Bay/Anglesey.
Cloud on the hills?
Fairly extensive, improving
Fairly extensive through the morning, from middle slopes up, to lower slopes in the west during rain. A lifting trend, mostly above 700m by noon, then more substantially breaking through afternoon, though high tops may only briefly clear.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Glimpses of sun breaking out with time. Visibility often poor in rain, improving to very good afternoon.
How Cold? (at 900m)
5C at dawn, slightly dropping, then sharply afternoon, to -1 or 0C into evening. Feeling like -10C in evening wind.
Freezing Level
Above the summits. Lowering to touch the summits into evening, settling near 700-800m overnight.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 28th March 2026
Last updated
Wed 25th Mar 26 at
4:19PM
How windy? (On the summits)
West-northwesterly 30 to 45mph, likely strongest in the morning, squally gusts. Gales likely return onward into night.
Effect of the wind on you?
Strenuous walking over the hills, frequent buffeting at least in morning. Significant wind chill.
How Wet?
Hail and snow showers
Showers most frequent in west from dawn, but extending inland and eastwards, brief hail, snow falling in morning to 300-400m, with time mostly rain below 600m. Fewer and lighter showers afternoon.
Cloud on the hills?
Varied over tops, lifting higher
Varied cloud capping higher slopes in the morning above 600-800m, lowest around showers near coasts. Lifting above higher slopes increasingly often into afternoon.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Patchwork of cloud and sun, best in east in morning. Visibility often very good, but reduced at times to briefly very poor in showers.
How Cold? (at 900m)
-1C rising to +1C afternoon. Wind chill feeling like -10 to -15C.
Freezing Level
700m in morning, plus frost sheltered inland valleys around dawn, rising just above freezing to highest tops afternoon.
Planning Outlook
Thursday starts chilly with clear skies for many, snow then rain moves into western areas with time. Strong northwesterly winds prevail as the weekend starts, brining cooler temperatures and a mix of showers and sun across most areas, the showers likely snowy to middle elevations with some hail mixed in. The cool, spring-like conditions will allow showers to become heavier and more widespread in the afternoon. Sunday into next week sees high pressure southwest of the country, producing drier weather with sun breaks, a trend towards milder temperatures too, but several low pressure systems to the north draw bands of rain eastward, mostly affecting Scotland, occasionally northern England and Wales. A risk of cooler northerly winds re-establishing later in the week, though detail is uncertain.