Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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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.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Warm
Comfortable temperatures on the hills, 10 to 15C 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
Monday 24th August 2026
Last updated
Sun 23rd Aug 26 at
4:00PM
Summary for all mountain areas
Dry overall with sunshine and broken cloud. Some early low-level fog patches will soon disperse, briefly cloud drifting over some hill slopes, but most mountains often clear all day. Light-moderate south-southeasterly breezes, locally gusty, stronger easterly winds mid & south Wales.
Headline for Eryri / Snowdonia National Park
Increasing breezy, gusty. Dry with sun, clear hills.
How windy? (On the summits)
Southeast 10-15mph at first, becoming easterly during morning 15-25mph, speeds rising from the south and increasingly gusty in places, later in day 30mph, soonest mid Wales; some stronger gusts up to dusk and onward.
Effect of the wind on you?
Starting small, but the breeze notably picks up in exposure through the day, into evening starting to affect ease of walking and balance on tops and ridges.
How Wet?
No rain expected
Cloud on the hills?
Hills clear
A little patchy mist on low slopes in the morning, soon lifting and dissipating for clear hills.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Mostly sunny, some thin high cloud builds with time. Good visibility but some haze mainly morning.
How Cold? (at 900m)
10C rising to 13C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 25th August 2026
Last updated
Sun 23rd Aug 26 at
4:00PM
How windy? (On the summits)
Easterly 20 to 30mph.
Effect of the wind on you?
Fairly small but feeling breezy over higher terrain, in places may start to affect balance on exposed tops and ridges.
How Wet?
Rain unlikely
Chance of a little fine drizzle where in early cloud banks in east. Into night, possibly an odd burst of rain moving up from the south.
Cloud on the hills?
Little or none
Patchy cloud banks on some eastern slopes for a few hours from dawn will all clear.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sun and thin high cloud. Visibility very good west, slight haze looking eastward.
How Cold? (at 900m)
9C rising to 13C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 26th August 2026
Last updated
Sun 23rd Aug 26 at
4:00PM
How windy? (On the summits)
Easterly 25-30mph and gusty early in day, becoming south-southeasterly 15-20mph or less.
Effect of the wind on you?
Early gustiness tending to ease to become fairly small.
How Wet?
Early rain, risk thundery bursts later
A risk of steady rain and drizzle over a few hours early in the day, tending to clear northwards. Then during afternoon into evening, risk of heavier bursts of rain forming with possible thunder.
Cloud on the hills?
Fairly extensive, lifting, some breaks
Cloud fairly widely shrouding hills above 400-600m from dawn, some lower banks toward east. Tending to rise and break, but patches may cling around some high tops.
Chance of cloud free summits?
20% rising to 60%
Sunshine and air clarity?
Occasional weak sun through high cloud, often overcast. Hazy start, visibility improving to be good when dry.
How Cold? (at 900m)
12C rising to 14C, quite humid. Feeling like 5C in the wind at first.
Freezing Level
Above the summits.
Planning Outlook
Low pressure to the south will develop and drift across Britain into the second half of this week bringing increasingly wet conditions widely. Areas of rain will drift northward during Wednesday, possibly thundery showers forming over England & Wales. Heavy and thundery rain likely affects England, Wales & southern Scotland on Thursday-Friday, potentially prolonged heavy falls bringing a risk of flooding locally. Northwest Scotland likely driest. The eastern Highlands often covered in low cloud. Strong gusty easterly winds prevail for a few days through midweek. Into the weekend it remains unsettled with areas of rain and heavy showers, plus cooler northwesterly winds developing.