Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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
Thursday 15th October 2026
Last updated
Wed 14th Oct 26 at
4:20PM
Summary for all mountain areas
A band of rain over south Scotland moves south and east, several hours of steady rain first reach north England and gradually spreads into Wales and Pennines. Very windy and mild England and Wales before the rain arrives. Scotland is chilly with showers and sun breaks, showers increase and push east with time.
Headline for Eryri / Snowdonia National Park
Gusty gales; patchy rain sets in
How windy? (On the summits)
Southwesterly in the range of 40-50mph, will vary somewhat, sometimes suddenly strengthening with powerful gusts, but then ultimately beginning to lessen late in the day into night.
Effect of the wind on you?
Arduous walking most of the day in exposure, frequent buffeting gusts require bracing to maintain balance; significant wind chill.
How Wet?
Some drizzle, rain sets in
A little fine drizzle on high tops, generally damp air on high terrain facing the Llyn Peninsula, but many hills dry through morning. Patchy rain forms from northwest around midday, soon setting in for frequent falls, most persistent on slopes near Cardigan Bay with some heavy falls forming.
Cloud on the hills?
Soon becoming extensive
High tops and slopes towards Cardigan Bay in cloud above 700-800m much of the day, though a few brief windows of higher cloud possible early, particularly Berwyn group/Carneddau. Cloud begins to fill in extensively as morning goes, to middle slopes and increasingly lower west, patches forming to valley level in heaviest rain.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Glimpses of sun in the morning, mostly north and east of major hill groups where visibility will be good. Soon becoming overcast with poor visibility increasingly widely.
How Cold? (at 900m)
A mild 9 or 10C, may locally rise a degree, but then notably cooling near or after nightfall. Feeling near or below 0C in strongest direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 16th October 2026
Last updated
Wed 14th Oct 26 at
4:20PM
How windy? (On the summits)
Northwesterly 20-30mph, some notable gusts forming over high tops.
Effect of the wind on you?
Often fairly small; walking at times impeded on high terrain, buffeting gusts forming later.
How Wet?
Showers, tending to ease
Showers push onto the hills from the northwest, which may cluster together at times with local heavy bursts, but generally easing as the day goes.
Cloud on the hills?
Varied banks over high tops
Ragged cloud clings to the hills around dawn, possibly a thicker deck of cloud on high terrain towards north and west slopes nearest to coasts. Cloud will lift, varying around 800m in showers, but often just capping tops during dry windows with breaks forming.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Patchy sun, best of sun towards Berwyn group. Good visibility, some haze towards coasts.
How Cold? (at 900m)
3 or 4C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 17th October 2026
Last updated
Wed 14th Oct 26 at
4:20PM
How windy? (On the summits)
Northwesterly 10-15mph, may gust up to 20mph over high tops.
Effect of the wind on you?
Mostly small.
How Wet?
Little or none
A little spotty light rain may drift into northern Snowdonia NP around dawn, but soon fading for dry hills.
Cloud on the hills?
Mostly just northern high tops
Patchy banks at varied heights in the morning, some mist in sheltered valleys. May be more extensive on high terrain near and north of the Ogwen valley to start, but cloud will lift and tend to break up from sunrise, to just passing banks over Snowdon and high Carneddau summits.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Mostly sunny, a little fair weather cloud at times. Very good visibility.
How Cold? (at 900m)
2 or 3C.
Freezing Level
Above the summits.
Planning Outlook
Friday starts fresh with local valley frosts, freezing level onto the highest Munros. Bright for many, though showers affect west areas, particularly Scotland, and spread more widely afternoon. A window of settled weather follows over the weekend as a core of high pressure builds over Scotland. Clear night skies allow for chilly mornings with ground frosts and some valley mist. Sun breaking out, though some cloud will linger on upper slopes, only limited scope for local inversion conditions. An easterly breeze will keep the skies a touch cloudier in England and Wales, chance a little light rain for England on Sunday. Pressure remains high into next week though some areas of low pressure will try to break through. Forecast confidence reduces from mid-week with a risk of unsettled conditions returning.