Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
Patchy cloud and winter sun
Mostly dry with a mix of cloud and sun, patchy cloud occasionally covering some mountain slopes.
Clear over snow cover
Excellent or superb visibility, but be aware that paths over the mountains may be obscured by lying snow.
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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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.
Patchy cloud and winter sun
Mostly dry with a mix of cloud and sun, patchy cloud occasionally covering some mountain slopes.
Clear over snow cover
Excellent or superb visibility, but be aware that paths over the mountains may be obscured by lying snow.
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
Tuesday 17th February 2026
Last updated
Mon 16th Feb 26 at
3:52PM
Summary for all mountain areas
Early snow showers in northern Scotland and north Wales, these easing to dry and sunny conditions across the country. Lying snow remains on most slopes above 700-800m, locally lower. A blustery morning, particularly eastern areas where powerful gusts will reach gale force, but easing to fairly small effects widely.
Headline for Eryri / Snowdonia National Park
Cold winter sunshine; breezy early with snow showers north
How windy? (On the summits)
Northerly 20 to 30mph early morning, risk stronger up to dawn, but dropping, to NE'ly 15mph, or less during afternoon.
Effect of the wind on you?
Prepare for considerable wind chill in the morning, blustery conditions for a few hours at least, but improving to fairly small effects.
How Wet?
Local early showers soon clear
Risk of snow showers from the Irish Sea drifting into Carneddau at and before dawn, an odd shower may reach closer to slopes facing the A5. Showers soon cease for a dry day.
Cloud on the hills?
Largely or all clearing
Banks of cloud on higher slopes in northern areas in the morning. By afternoon mountains largely or completely free of cloud.
Chance of cloud free summits?
40% rising to 80% by afternoon
Sunshine and air clarity?
Patchy cloud and sun, becoming sunnier, soonest mid Wales but with a veil of thin high cloud gradually approaching afternoon. Excellent visibility.
How Cold? (at 900m)
-3 or -4C. Early in day, feeling like -12C directly in the wind, easing.
Freezing Level
400 to 600m, highest toward west coast. Lowering overnight.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 18th February 2026
Last updated
Mon 16th Feb 26 at
3:52PM
How windy? (On the summits)
Southeasterly 40-50mph; constant powerful gusts over high terrain and passes, approaching 60mph or higher.
Effect of the wind on you?
Widely challenging conditions with severe wind chill; powerful gusts make staying on your feet constantly difficult.
How Wet?
Most likely dry
A risk of occasional snow flurries drifting onto southern and western slopes, falling as rain below 400-500m, but more likely dry. The risk of precipitation increases late in the day towards east and mid-Wales.
Cloud on the hills?
Some cloud over tops later, may deteriorate
The hills often free of cloud, but with time, an increasing chance of cloud caps grazing the high tops of mid-Wales and Yr Wyddfa (Snowdon). Slopes towards Anglesey likely stay largely free of cloud.
Chance of cloud free summits?
70%, may lower afternoon
Sunshine and air clarity?
Weak sun through high cloud, may trend more overcast with time. Very good visibility though an early haze.
How Cold? (at 900m)
-2 or -3C. Feeling like -20C or colder in exposure.
Freezing Level
300-400m, rising north and west of high terrain but poorly defined, may thaw to 600m or higher.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 19th February 2026
Last updated
Mon 16th Feb 26 at
3:52PM
How windy? (On the summits)
East-southeasterly 25-35mph, gusty over high terrain; easing, 15mph and possibly lower for a time with variable wind.
Effect of the wind on you?
Strenuous walking in exposure to start the day with wind chill; effect may become fairly small but detail uncertain.
How Wet?
Small chance early snow
A small chance of some early snow flurries affecting mostly eastern slopes, if at all, and soon 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, rising further overnight.
Planning Outlook
Much terrain frozen midweek, frost into valleys and glens. Strengthening wind on Wednesday with considerable gustiness, gales likely in Wales; possible snow moving into Wales as well, which may move further north but detail is uncertain. Late in the week and through next weekend, a switch to southwesterly winds is expected, bringing a change to milder conditions - lifting above freezing to tops in England and Wales, and generally higher freezing levels in Scotland; periods of thawing likely to Munro summits, though some further snowfall at times on higher Munros during periods of cooler northwesterly wind. Rain most frequent over western hills. Generally windy with upland gales.