Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday'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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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 14th October 2026
Last updated
Tue 13th Oct 26 at
4:23PM
Summary for all mountain areas
Gales in north England and Scotland, strengthening for severe conditions, storm-force over Munros. Cloud and patchy rain, mostly west, increasing through afternoon, steady heavy rain northwest highlands later. Near-gales for south Pennines and Wales, mixed cloud and sun, some patchy rain forming.
Headline for Eryri / Snowdonia National Park
Strong wind reaches gale-force, a little light rain
How windy? (On the summits)
Southwesterly, in range 30 to 40mph to start, notable increase with height; sustained speeds locally 50-55mph afternoon.
Effect of the wind on you?
Strenuous walking even on lower hills, gusts knocking you off balance, increasingly difficult on high terrain, maintaining balance requiring constant effort.
How Wet?
A little light rain mostly west
Spots of light rain in the wind, a damp feeling around cloud over west hills towards coasts, drier further east and northeast.
Cloud on the hills?
Most persistent west coast hills
Banks of cloud clinging to western hills much of day above 600-700m, lowest near west coast. Near/north from Ogwen valley, the cloud base higher, often above 800m with breaks to some summits. Also clearer east Wales.
Chance of cloud free summits?
20% west, 40% north, 60% east.
Sunshine and air clarity?
Sunshine in-and-out much of the day, more often cloud south and western aspects. Some high cloud weakens the sun. Hazy, visibility better further east and around Carneddau.
How Cold? (at 900m)
7 or 8C, may locally reach 9C to the northeast of high Snowdon group summits. Feeling like -5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 15th October 2026
Last updated
Tue 13th Oct 26 at
4:23PM
How windy? (On the summits)
Southwesterly in the range of 40-50mph, will vary somewhat, sometimes suddenly strengthening with powerful gusts.
Effect of the wind on you?
Strenuous walking in exposure, buffeting gusts and risk of sudden deteriorating conditions; considerable wind chill.
How Wet?
Drizzle, rain later
A fine drizzle on high tops, generally damp air on high terrain facing the Llyn Peninsula. A band of rain will arrive from the northwest afternoon, though timing is uncertain and a drier window before arrival is possible.
Cloud on the hills?
Fairly extensive, chance a clear window
High tops and slopes towards Cardigan Bay in cloud above 800m much of the day, more broadly to 500-600m in morning. A window of higher cloud bases possible, particularly Berwyn group/Carneddau, but then filling in extensively to middle slopes afternoon.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Patchy sun, best north and east, some windows of good visibility but some haze, trending cloudy. Visibility often poor towards Cardigan Bay.
How Cold? (at 900m)
A mild 9 or 10C, notably cooling overnight. 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
Tue 13th Oct 26 at
4:23PM
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, easing
Showers push onto the hills from the northwest, which may cluster together at times and an odd heavy burst, 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. From dawn, cloud will lift varying above 800m around showers, but often just capping tops with some 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.
Planning Outlook
Frontal rain into south Scotland and north England on Thursday, though details of how the front will move are currently uncertain. Starting on the milder side south of the front, fresher air arrives behind the rain Thursday into Friday, sun breaking out with a few showers - Scottish high summits drop back close to freezing with some snow falling on higher tops. Higher pressure builds on Friday, easing remaining showers with plenty of sun breaking out though a gusty northerly wind will persist for a time. A window of settled weather over the weekend and scope for local inversion conditions. Clear night skies allow for chilly mornings, ground frosts likely, and may remain breezy south Pennines and Wales. Pressure remains high into the next week though a few brief unsettled moments come and go.