Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
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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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
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
Wednesday 25th March 2026
Last updated
Tue 24th Mar 26 at
3:40PM
Summary for all mountain areas
Widespread hail and snow showers, at times heavy with a risk of isolated lightning. Fewer showers in the N Pennines and southeast Scotland for a few morning hours, but returning afternoon. Gales widespread as well with sudden strong gusts, easing only slightly in Scotland. Cold, staying below freezing above 500-600m.
Headline for Eryri / Snowdonia National Park
Frequent snow and hail showers; gales
How windy? (On the summits)
Northwesterly 40 to 50mph, variable speeds with squally gusts around showers, reaching 55mph.
Effect of the wind on you?
Challenging walking conditions most of the day with significant wind chill. Beware sudden, strong gusts that will require bracing to maintain stability.
How Wet?
Frequent hail and snow
Showery snow and hail falling to lower slopes, frequent to at times near-constant over coastal areas in the north and west, but extending across all the region. Risk of isolated thunder & lightning.
Cloud on the hills?
Varying, but often capping tops
Cloud base constantly changing, will come and go all day above 800m, frequently capping high tops toward coast, patches at times to 600m. North and western slopes may see only rare breaks above 800-900m.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief bursts of bright sun, most often and extensive towards the east. Visibility intermittently very good, but appalling for periods in showers with brief whiteout over tops.
How Cold? (at 900m)
-2 or -3C, slight rise into afternoon. Wind chill feeling like -15C or colder on high tops.
Freezing Level
500m from dawn, lifting to 700m, slightly higher away from showers.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 26th March 2026
Last updated
Tue 24th Mar 26 at
3:40PM
How windy? (On the summits)
North-northwesterly 20-25mph early, some gustiness, shifting westerly and easing to 15-20mph, perhaps briefly lower.
Effect of the wind on you?
Walking impeded with balance challenges on high exposed ridges early. Easing to fairly small effects.
How Wet?
Patchy rain arrives afternoon into evening.
A few early snow showers affecting the Snowdon group towards Carneddau, soon fading for a dry day. Through afternoon, some light patchy rain possible here and there, amounting to little, more into evening.
Cloud on the hills?
Mostly just high terrain, some variability
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. Will become more extensive afternoon into evening.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Bright sunshine in the morning, gradually weakened by increasing high cloud. Excellent visibility.
How Cold? (at 900m)
-2C, rising towards 0C by evening, rising further overnight. Feeling like -10 to -13C in early wind.
Freezing Level
600-700m, though lower frosts likely early, particularly east. Gradually lifting, sharply to above summits as dusk approaches.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 27th March 2026
Last updated
Tue 24th Mar 26 at
3:40PM
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.
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 as rain eases to very good.
How Cold? (at 900m)
5C at dawn, slightly dropping, then sharply from midday, 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.
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.