Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Hazy, some fog banks
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Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of cloud.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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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.
Hazy, some fog banks
Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of cloud.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 17th January 2026
Last updated
Fri 16th Jan 26 at
4:26PM
Summary for all mountain areas
A slow-moving area of snowfall in central-eastern Highlands, may be often patchy and light, but risk locally more persistent, low cloud extensive. Clearer northwest coasts of Scotland. Low cloud much of northern England, some early rain and hill snow. Drier for Wales with varied low cloud. Light-moderate SE'ly winds.
Headline for Eryri / Snowdonia National Park
Breezy, gusty spots. Mostly dry, cloud breaks best northwest.
How windy? (On the summits)
Southeasterly 15 to 25mph, but in places 30mph up the west coast and some tops inland, gusty north of high summits.
Effect of the wind on you?
Varied, in places feeling more blustery, giving marked wind chill in exposure on tops.
How Wet?
Largely dry
Chance of an odd shower around the Llyn peninsula. Odd pockets of drizzle possible eastern mid-Wales.
Cloud on the hills?
Varied low cloud, breaks northwest
Banks of cloud from mid to upper slopes most widely east and mid-Wales. Higher and more broken cloud toward the west coast and northward, often clear of some upper slopes Carneddau area and northwest Snowdon group.
Chance of cloud free summits?
30%, to 60% north/northwest.
Sunshine and air clarity?
Mostly overcast, some sun breaks through in northwestern areas. Slight haze, misty some areas in morning, but visibility mostly good toward the north.
How Cold? (at 900m)
1 or 2C. Feeling like -7C in the strongest wind.
Freezing Level
Close to freezing on higher slopes around 900m upward.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 18th January 2026
Last updated
Fri 16th Jan 26 at
4:26PM
How windy? (On the summits)
South to southeasterly 15 to 20mph, risk of stronger gusts in places around higher tops.
Effect of the wind on you?
Fairly small, but expect noticeable chill factor in exposure on tops.
How Wet?
Little if any precipitation
Feeling damp in the air in low cloud / fog. Some steadier drizzle may develop over eastern hills in mid-Wales.
Cloud on the hills?
Fairly extensive, some breaks N/W
A cloud sheet likely to cover mid and east Wales most or all day from mid-elevations upward, cloud banks across many hills westward, but some breaks mainly near west coast and north/west of Ogwen.
Chance of cloud free summits?
20%, to 50% NW areas.
Sunshine and air clarity?
Glimpses of sun mainly coastal areas toward Anglesey. Visibility good out of cloud, but dull and in places misty to some mid or lower slopes inland and east.
How Cold? (at 900m)
2C. Feeling like -5C directly in the wind.
Freezing Level
Some higher slopes near to freezing point, terrain partly frozen higher up.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 19th January 2026
Last updated
Fri 16th Jan 26 at
4:26PM
How windy? (On the summits)
Southeasterly 20mph, gusty 25mph in places around some higher tops, possibly 30mph for periods.
Effect of the wind on you?
Fairly small, but at times more blustery in exposure, affecting ease of walking. Marked wind chill.
How Wet?
A little rain
Patchy rain up to the summits, may become more persistent from south.
Cloud on the hills?
Fairly extensive
Low cloud shrouding the hills widely, from mid-slopes upward in mid Wales. Some higher bases northwestward, locally may break toward some tops.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast and dull, poor visibility over possibly many hills, hazy lower down, locally better toward northwest.
How Cold? (at 900m)
3C. Feeling like -5 to -8C directly in the wind.
Freezing Level
Above freezing to higher tops, but high terrain stays partly frozen.
Planning Outlook
A slow-moving weather pattern onward into early next week with chilly air in place across the British Isles, mountains staying near to freezing point in Scotland, typically just above freezing to high tops in England and Wales for a few days. Some weak fronts try to push in from the west bringing occasional rain and hill snow, amounts generally small. High pressure around Scandinavia is likely to dominate the patterns into the later stages of January, with colder air trying to push in from the east, much mountain terrain will be frozen. Occasional snow likely, generally driest in the northwest.