Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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 13th October 2026
Last updated
Mon 12th Oct 26 at
4:13PM
Summary for all mountain areas
Heavy rain over England and Wales at dawn clears eastward, followed by showers, sun breaks, and cooler temperatures. Showers soon frequent west Scotland, clustering for sustained heavy rain/hail, sweeping east across Scotland afternoon. Widely windy, powerful gusts around rain.
Headline for Eryri / Snowdonia National Park
Early rain clears, showers follow but fade with time; windy
How windy? (On the summits)
West-southwesterly 40-45mph just around dawn, tending to lessen as the day goes, finishing near 30-35mph, may further lessen into night. Always a risk of powerful gusts returning.
Effect of the wind on you?
Challenging to start with powerful gusts making stability a constant challenge. Effects will lessen, though walking likely stays strenuous in exposure during daylight. Significant wind chill.
How Wet?
Early rain then showers, easing
Heavy rain around dawn clears away eastwards in morning, leaving a brief drier window. Some showers will drift onto the hills from the west, may be frequent at first, but tending to ease with time.
Cloud on the hills?
Often capping highest tops, variably lowering, notably west
Extensive around and just after dawn, breaking into varied cloud banks, lifting toward upper slopes and clearing some high tops for a time well inland; patches often cap higher tops in Snowdon group and near coast. Varied lower banks towards 600m west, but a breaking trend with time.
Chance of cloud free summits?
30%, later starting to rise
Sunshine and air clarity?
Some sun breaking through occasionally, best in the east. More often cloudy west, but breaks tending for form with time. Visibility good as rain clears, but some haze in west, reduced further in showers.
How Cold? (at 900m)
Mild 12C overnight but dropping to 8C as dawn breaks, further lowering during the day to finish around 7C. Feeling later like -6C in stronger wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 14th October 2026
Last updated
Mon 12th Oct 26 at
4:13PM
How windy? (On the summits)
Southwesterly, in range 30 to 50mph, notable increase with height; sustained speeds locally 55-60mph afternoon.
Effect of the wind on you?
Strenuous walking even on lower hills, gusts knocking you off balance, increasingly difficult on high terrain.
How Wet?
A little rain west
Spots of rain in the wind, frequently damp around cloud over west hills near 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. Also clearer east Wales.
Chance of cloud free summits?
20% west, 40% north, 60% east.
Sunshine and air clarity?
Glimpses of weak sun mostly north and eastern areas. Hazy, visibility better further east.
How Cold? (at 900m)
6C rising to 8C. 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
Mon 12th Oct 26 at
4:13PM
How windy? (On the summits)
Southwesterly in the range of 35-50mph, 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
Drizzly 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 for a few afternoon hours, some northeast summits clearing, but returning extensively evening/night.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Bursts of sun to the north and east, some windows of good visibility but some haze. Visibility more often poor towards Cardigan Bay.
How Cold? (at 900m)
A mild 9 or 10C. Feeling near or below 0C in strongest direct wind.
Freezing Level
Above the summits.
Planning Outlook
Southwesterly gales strengthen to become severe on the mountains into Wednesday, moderating into Thursday. Cloudy with some drizzle on western hills, a band of more extensive heavier rain passing southeastwards Wednesday into Thursday as well. Starting on the milder side, but fresher air arrives behind the band of rain Thursday into Friday, sun breaking out with a few showers - Scottish high summits may drop back close to freezing with some snow falling on higher tops. Indications of higher pressure building on Friday and into the weekend, bringing a window of more settled weather and scope for local inversion conditions on high terrain. Clear night skies allow for chilly mornings, some ground frosts likely, and may remain quite blustery south Pennines and Wales.