Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday'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.
Patchy cloud and winter sun
Mostly dry with a mix of cloud and sun, patchy cloud occasionally covering some mountain slopes.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Winter kit required on higher terrain
Snow cover over higher mountains. Safe progress over some terrain will require suitable footwear - possibly crampons and ice-axe where necessary.
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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.
Patchy cloud and winter sun
Mostly dry with a mix of cloud and sun, patchy cloud occasionally covering some mountain slopes.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Winter kit required on higher terrain
Snow cover over higher mountains. Safe progress over some terrain will require suitable footwear - possibly crampons and ice-axe where necessary.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 18th February 2026
Last updated
Tue 17th Feb 26 at
3:59PM
Summary for all mountain areas
Cold with widespread gales in exposure; powerful gusts and severe wind chill. North and west Scotland often dry and free of cloud; an increasing risk of snow south with time, possibly east as well. English hills largely dry, hill cloud mostly isolated to high Pennines. Cloudier Wales with snow arriving from the south.
Headline for Eryri / Snowdonia National Park
Gales, powerful gusts; dry, then risk of snow from the south
How windy? (On the summits)
Southeasterly 40-50mph; constant powerful gusts over high terrain and passes, approaching 60mph or higher. Starting to ease after dark and shift easterly.
Effect of the wind on you?
Widely challenging conditions with severe wind chill; powerful gusts require crouching with constant effort to maintain stability.
How Wet?
Often dry but a risk of deterioration from the south
Occasional snow flurries drifting onto southern and western slopes, falling as drizzly rain below 300-400m, but more likely dry. The risk of precipitation increases in the afternoon in the Berwyn group, small chance more widely across the region.
Cloud on the hills?
Starting on high tops and east Wales, probably deteriorating
Cloud caps grazing the high tops of mid-Wales and Yr Wyddfa (Snowdon) in the morning, an increasing risk of cloud spreading more widely, primarily mid and east Wales; slopes towards Anglesey stay free of cloud the longest.
Chance of cloud free summits?
50%, likely lowering with time.
Sunshine and air clarity?
Weak sun through high cloud in the morning, best towards Anglesey, but trending more overcast with time. Very good visibility though an early haze.
How Cold? (at 900m)
-2 or -3C. Western aspects always a degree warmer, may locally reach 0C near Y Garn/west of Carneddau. Feeling like -20C or colder in exposure.
Freezing Level
300-400m, rising to 500-600m most areas, higher north and west of high terrain, some thaws to upper terrain; an exact freezing level poorly defined.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 19th February 2026
Last updated
Tue 17th Feb 26 at
3:59PM
How windy? (On the summits)
Easterly 20-30mph at/before dawn, easing to light and variable conditions, reorienting westerly, 20mph by dusk.
Effect of the wind on you?
Strenuous walking in exposure to start the day with wind chill, then fairly small for most of the day.
How Wet?
Some early snow east Wales.
A small chance of some early snow flurries affecting mostly eastern slopes, becoming dry.
Cloud on the hills?
High tops and eastern slopes, likely improving
Patchy cloud on the upper eastern slopes, may shroud most high terrain early in the day, but an improving trend, most hills clearing by later in the day; some uncertainty in timing, may stay cloudier longer.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Mostly cloudy to start the day, sun increasingly breaking out, mostly west. Improving visibility, some haze east.
How Cold? (at 900m)
-2 or -1C, some variability, and little change with added height.
Freezing Level
300-400m, lifting to near 700m and may rise further overnight.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 20th February 2026
Last updated
Tue 17th Feb 26 at
3:59PM
How windy? (On the summits)
Southwesterly 40-55mph, likely quite gusty.
Effect of the wind on you?
Challenging conditions all day with significant wind chill; maintaining stability requires constant effort in exposure.
How Wet?
Patchy rain, sometimes more
Patchy rain/drizzle affecting high western hills much of the day, the best chance of dry periods in east Wales, also with a risk of a few more organized bands of rain sweeping west-to-east.
Cloud on the hills?
Fairly extensive
Cloud shrouds high terrain and slopes to the west and south down to the middle slopes most of all day. Cloud at times well broken and higher bases towards Carneddau, but filling in here too during rain.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Mostly cloudy but some bright/sunny breaks will come and go, best east. Variable visibility, good out of cloud and rain, but some haze too.
How Cold? (at 900m)
Around 0C from dawn, some local variability, rising to 5C. Feeling like -7 to -10C in direct wind.
Freezing Level
Poorly defined from dawn: highest terrain likely frozen, some lower slopes as well, soon rising above the summits.
Planning Outlook
Much terrain in England and Scotland remains frozen as the weekend approaches. However, freezing level will be less well defined on western slopes as stable downslope flow may warm and thaw frozen ground up to middle elevations, particularly in Wales and England. Friday into the weekend sees a switch to southwesterly winds, bringing milder conditions - lifting above freezing to tops in England and Wales, and generally higher freezing levels in Scotland; periods of thawing to Munro summits will occur but also further snowfall on higher terrain during the day-to-day variability of precipitation and freezing levels. Often cloudy with periods of rain further south, most often affecting western and southern hills where cloud will be lowest and at times drizzly in the south. Often windy with upland gales.