Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 18th March 2026
Last updated
Tue 17th Mar 26 at
3:05PM
Summary for all mountain areas
Patchy low cloud across many hills early, lifting and fading, particularly away from west coasts; sun breaking out. A weak front lingers over south Scotland, maintaining low cloud and some light spotty drizzle. Light wind, though a blustery morning in the north Scottish highlands; breezy in south Wales too.
Headline for Eryri / Snowdonia National Park
Some early low cloud clearing for sunshine
How windy? (On the summits)
South-to-southeasterly 5-15mph. Some variability early in the day with notable gusts, not just on high terrain.
Effect of the wind on you?
Mostly small.
How Wet?
No precipitation expected
Cloud on the hills?
Some early cloud, mostly clearing
Some low valley fog in east Wales in the morning, a few ragged patches may graze lower hills to the west in the morning as well. This cloud will lift and dissipate after sunrise, most hills clearing, though may be slow on some east Wales slopes.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Mostly sunny. Very good visibility.
How Cold? (at 900m)
7C from dawn, little change in temperature with height; lifting to 11C, staying elevated into night on upper slopes.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 19th March 2026
Last updated
Tue 17th Mar 26 at
3:05PM
How windy? (On the summits)
Easterly 10mph, at times directed more southeasterly. Some light gustiness.
Effect of the wind on you?
Negligible.
How Wet?
No precipitation expected
Cloud on the hills?
Early valley fog dissipates for clear hills
Patches of fog in sheltered valleys in the morning, most common in east and mid-Wales. Fog begins to lift upslope after sunrise, soon dissipating for cloud-free hills.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Extensive sunshine, high cloud to the north later in the day. Good visibility but haze, particularly east Wales.
How Cold? (at 900m)
10C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 20th March 2026
Last updated
Tue 17th Mar 26 at
3:05PM
How windy? (On the summits)
Easterly or variable 10 to 15mph or less.
Effect of the wind on you?
Small.
How Wet?
Precipitation not expected
Cloud on the hills?
Mostly little
Patchy fog in valleys from dawn, possible patchy cloud forming around some hill slopes for a time, mostly eastern areas, but tending to lift above tops or largely disperse into middle of day.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Sun and thin cloud. Visibility very good, some haze lower down.
How Cold? (at 900m)
Around 5C, some cooler spots at first, then some slightly warmer spots by afternoon.
Freezing Level
Above the summits, but slight frost in valleys and some sheltered higher areas at dawn.
Planning Outlook
Fairly widely settled conditions across the country later this week. Some cloud and spotty light rain lingers in north England/south Scotland for a few days, elsewhere becoming mostly sunny; valley fog in many lowland areas early, lifting and dissipating after sunrise for clear hills. Generally milder temperatures and light wind but the occasional stronger gust. The weekend is anticipated to be settled as well, with a mix of cloud and sun, early low cloud lifting and clearing many mountains, only occasional spots of rain in the far northwest of Scotland. A spell of more unsettled weather expected next week, with stronger wind, precipitation, and colder temperatures.