Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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
Tuesday 21st October 2025
Last updated
Tue 21st Oct 25 at
7:15AM
Summary for all mountain areas
Patchy rain drifts east across the Highlands, breaking up into showers. Staying showery all day toward west coast, locally more frequent rain. Showery rain throughout the day for England and Wales, occasionally heavy. Low cloud most persistent west. Increasingly windy, feeling cold.
Headline for Eryri / Snowdonia National Park
Windy, frequent showery rain, cloud covering tops.
How windy? (On the summits)
Westerly 25 to 30mph, at times 35mph higher northern mountains, squally gusts in showers to 40mph.
Effect of the wind on you?
Affecting comfortable walking and balance on exposed tops and ridges. Considerable wind chill.
How Wet?
Rain on and off, occasionally heavy
Showery rain will come and go all day, most common west coastal areas, merging into frequent rain locally over an hour or more, some heavier bursts.
Cloud on the hills?
High tops often in cloud
Often covering higher terrain above 600-800m, lowest and most frequent western areas. Breaks at times higher up further east toward Berwyn and Bala.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, brief glimpses of sun mainly in east Wales. Visibility often poor over western hills in rain, very good at times inland/east.
How Cold? (at 900m)
6 or 7C, little change, small variation with height in morning; dropping to 4C into night. Feeling below freezing in the wind, near -5C on high tops.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 22nd October 2025
Last updated
Tue 21st Oct 25 at
7:15AM
How windy? (On the summits)
West turning southwesterly 15 to 20mph. Uncertain into night, variable then easterly, may start to increase.
Effect of the wind on you?
Mostly small during daytime. Possible deterioration into night.
How Wet?
Odd showers
One or two brief light showers, mostly west coastal areas. Into night, possibility of some rain developing, may well mostly remain further south, leaving just areas of showers.
Cloud on the hills?
Patches western tops, clearing
Some patchy cloud on higher western slopes, mostly above 700m, tending to disperse. Eastern hills largely clear. If rain arrives later, cloud then lowering.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Some sun mostly weakening as high cloud tends to thicken. Visibility excellent.
How Cold? (at 900m)
4 or 5C. Feeling just below freezing in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 23rd October 2025
Last updated
Tue 21st Oct 25 at
7:15AM
How windy? (On the summits)
High uncertainty - N-NW'ly may turn toward W, speed likely vary, 25-40mph, may strengthen further to 50mph.
Effect of the wind on you?
Expect blustery conditions and significant wind chill, may deteriorate further to make walking difficult.
How Wet?
Showery
Generally showery, more frequent precipitation on hills nearer to coasts, falling as snow on highest summits, some heavier showers with hail.
Cloud on the hills?
Varied on high tops
Often capping higher slopes, varying in and out of showers. Higher breaks more frequent well inland and eastern areas.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Some bursts of sun, mainly east mid-Wales. Visibility varied, poor in showers, intermittently very good.
How Cold? (at 900m)
2C. In stronger winds, chill factor feeling like -10C.
Freezing Level
Close to highest summits above 1000m.
Planning Outlook
A complex weather situation through midweek, with various centres of low pressure drifting around slowly. Areas of rain and showers, but also drier moments - Wednesday and possibly Thursday often dry in eastern Scotland and northern England - beware of a deterioration from the northwest during Thursday with gales and rain setting in. Significantly colder later in the week as winds turn northerly. Freezing level dropping to 800-1000m into the weekend, lowest in northern Scotland. A mix of sunshine and showers falling as snow on high terrain, most frequent in north-facing areas.