Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Friday 16th January 2026
Last updated
Thu 15th Jan 26 at
4:00PM
Summary for all mountain areas
Dry for much of the Highlands, many northern mountains clear, in places above patchy valley fog, some weak sun through high-level cloud above the mountains. Breezy toward the west, some showers southwest coasts of Scotland, also S/W Wales. Areas of low cloud over Pennines and S Lakes may linger.
Headline for Eryri / Snowdonia National Park
Increasingly windy. Showers mostly far west coast, patchy cloud.
How windy? (On the summits)
South to southwesterly 25 to 40mph, steady rise through day, strongest by dusk over higher western mountains.
Effect of the wind on you?
Be prepared for increasingly blustery or even arduous conditions to develop. Considerable wind chill in exposure.
How Wet?
Showers mostly west
Occasional showers moving in from the southwest, snow above 800m, hail at times to lower slopes, mainly near coast. Chance isolated thunder mainly Llyn peninsula. Often dry well inland and east.
Cloud on the hills?
Fairly extensive, best breaks north.
Cloud fairly extensive across upper slopes. Best breaks across northernmost tops. General bases around 600-800m.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little or no sun. Visibility good or very good away from showers.
How Cold? (at 900m)
0C or just above. Feeling like -8 to later -12C if exposed to stronger wind.
Freezing Level
900m, or tending to rise slightly to 1000m or above during afternoon.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 17th January 2026
Last updated
Thu 15th Jan 26 at
4:00PM
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, wind chill significant where exposed to the strongest wind.
How Wet?
Often dry, but patchy rain possible.
Occasional showers or patches of rain.
Cloud on the hills?
Varied banks of low cloud
Varied low cloud across the area. Banks of patches from mid to upper slopes, perhaps fairly extensive in coverage. Best breaks toward the west coast and northward.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Mostly overcast. Rather hazy with poor visibility where patches of rain occur.
How Cold? (at 900m)
2 or 3C, small rate of change in temperature with height. Feeling closer to -5C in the strongest wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 18th January 2026
Last updated
Thu 15th Jan 26 at
4:00PM
How windy? (On the summits)
South to southeasterly 15 to 25mph, risk of stronger gusts in places around higher tops.
Effect of the wind on you?
Blustery in exposure on some tops, may start to affect comfortable walking in places, giving marked wind chill.
How Wet?
Precipitation unlikely
Feeling damp in the air in low cloud / fog. Chance of local showers grazing the coast on Llyn peninsula.
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)
1 or 2C. Feeling like -7C directly in the wind.
Freezing Level
Some higher slopes near to freezing point, terrain partly frozen higher up.
Planning Outlook
Often dry and chilly conditions into the weekend with a south to south-easterly airflow developing, gusty wind in places. General patterns into the second half of January favour a colder continental influence. The snow pack across the Scottish Highlands will be enhanced by further spells of snowfall where where fronts edge in from the west, whilst for England and Wales snow accumulating on the hills at times, perhaps in the form of showers from the east.