Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Warm
Comfortable temperatures on the hills, 12 to 16C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Warm
Comfortable temperatures on the hills, 12 to 16C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 23rd August 2025
Last updated
Fri 22nd Aug 25 at
4:30PM
Summary for all mountain areas
Cloudy skies for many places, varied areas of low cloud on some hill slopes in the morning, largely lifting above the tops, but may continue to cap higher western mountains in Scotland, with a little rain occasionally. An odd shower in north Wales in afternoon. Winds generally light.
Headline for Eryri / Snowdonia National Park
Largely dry, isolated showers, cloud lifting above hills; light winds.
How windy? (On the summits)
Southeasterly or variable 5 to 10mph.
Effect of the wind on you?
Negligible
How Wet?
Little or no rain, locally a shower
Chance an odd patch of drizzle around early low cloud. A few well scattered showers forming during afternoon, very locally a heavier one possible.
Cloud on the hills?
Risk covering some tops for a few hours
Patchy low cloud at varied heights from dawn, may linger on some tops for a few hours. Most cloud likely lifting above the hills by middle of day.
Chance of cloud free summits?
70% rising to 90%
Sunshine and air clarity?
Occasional sun and mostly thin high cloud. May start misty, visibility becoming excellent.
How Cold? (at 900m)
10C from dawn. Rising to 14C afternoon.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 24th August 2025
Last updated
Fri 22nd Aug 25 at
4:30PM
How windy? (On the summits)
Southerly 10 to 15mph, reaching 20-25mph in places mainly hills toward west coast and on Llyn peninsula.
Effect of the wind on you?
Fairly small, but feeling noticeably gusty on some western hills.
How Wet?
Rain unlikely
Small chance an isolated light shower.
Cloud on the hills?
Varied, but mostly clearing
Patches around some slopes in the morning, mostly lifting above the hills, may come and go for several hours near coast.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Sun and some high cloud. Visibility good, but slight haze.
How Cold? (at 900m)
12C from dawn, rising to 14 or 15C afternoon.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 25th August 2025
Last updated
Fri 22nd Aug 25 at
4:30PM
How windy? (On the summits)
Southerly, strengthening, 25-35mph, reaching 40-45mph higher mountains around Yr Wyddfa/Snowdon.
Effect of the wind on you?
Increasingly affecting comfortable walking on exposed higher terrain, becoming more challenging in places, buffeting gusts.
How Wet?
Rain unlikely until late
Dry most or all day. Chance of odd spots from thickening high cloud. By evening into night, risk of steadier rain developing from southwest, may turn heavy.
Cloud on the hills?
Generally clear
Any early fragments soon clearing.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Sunshine and some high cloud. Visibility good, but a haze, particularly near the coast.
How Cold? (at 900m)
12C rising to 15C. In the wind feeling below 5C.
Freezing Level
Above the summits
Planning Outlook
High pressure drifts slowly east, whilst low pressure over the Atlantic encroaches nearer in the early part of the new week. Southeasterly winds increasing Sunday-Monday, soonest for western regions, becoming much windier by Monday in west, then more widely with time. Areas of rain and showery bursts increasingly widespread as the week progresses as low pressure then rotates slowly over Britain - day-to-day detail becomes very uncertain. Warmer and more humid for a time, then cooler later in week.