Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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 rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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 rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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
Sunday 18th January 2026
Last updated
Sat 17th Jan 26 at
3:30PM
Summary for all mountain areas
Cloudy and damp air over many hills, more persistent rain and drizzle develops over northern England and east Wales. Clearer toward north-northwest Scotland. Near or below freezing on Scottish mountains. South to southeasterly winds, gusty in places; strongest toward Skye.
Headline for Eryri / Snowdonia National Park
Varied low cloud, rain mostly east; light-moderate breeze.
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?
Rain most persistent east
Patchy rain and drizzle extending northwards, some steadier rain or locally risk heavier at times over eastern hills in mid-Wales, smaller amounts westwards, near/west of Snowdon group may see little.
Cloud on the hills?
Fairly extensive, highest north/west
A cloud sheet covers mid and east Wales most or all day from mid-elevations upward. Further west, higher bases, but cloud banks across many hills, some higher breaks mainly north of Ogwen valley.
Chance of cloud free summits?
10%, to 30% north.
Sunshine and air clarity?
Largely cloudy. Visibility good out of cloud mainly toward north/northwest, but widely 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
Sat 17th Jan 26 at
3:30PM
How windy? (On the summits)
Southerly 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.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 20th January 2026
Last updated
Sat 17th Jan 26 at
3:30PM
How windy? (On the summits)
South-southeasterly, likely strengthening 30 to 50mph, powerful gusts around high tops and in places downslope to north.
Effect of the wind on you?
Increasingly arduous walking conditions, buffeting gusts affecting balance; significant wind chill.
How Wet?
Frequent or persistent rain
Patchy rain may become more frequent from the south, some steadier rain setting in for periods, risk heavier in west.
Cloud on the hills?
Fairly extensive
Covering most higher terrain, to some mid-slopes in rain, some breaks north of A5.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Generally cloudy and dull. Hazy or misty over most hills, some good visibility lower slopes in north if dry.
How Cold? (at 900m)
1 or 2C. Wind chill feeling like -10 to -15C.
Freezing Level
Just above freezing on highest summits, icy surfaces on high tops.
Planning Outlook
South to southeasterly winds prevail into the new week, trending more easterly in Scotland, widely strengthening to become persistently windy, gales over mountains with powerful gusts. Mountains staying near to freezing point in Scotland, typically just above freezing to high tops in England and Wales for a few days. Initially weak fronts try to push in from the west bringing occasional rain and high-level snow, then some more persistent falls later in the week; generally driest in northwest Scotland. Colder air trying to move in from the east into later January, leaving most mountain terrain frozen in the longer range.