Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
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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Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
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
Tuesday 11th November 2025
Last updated
Mon 10th Nov 25 at
4:07PM
Summary for all mountain areas
Rain from dawn in Wales soon spreads widely into England and southern Scotland, setting in for several hours; nearly constant all day for Lakeland and Galloway hills. Widespread gales as well, severe in Wales. A drier start for Scottish Highlands, though rain will spread from the south afternoon with strengthening wind.
Headline for Eryri / Snowdonia National Park
Severe gales over the tops with frequent rainfall
How windy? (On the summits)
Southerly, strengthening rapidly overnight up to dawn, 45 to 60mph all day, with gusts often reaching 70mph over western tops.
Effect of the wind on you?
Difficult walking conditions; any mobility challenging around western high tops. Strong downslope gusts on northern aspects likely. Marked wind chill despite mild air.
How Wet?
Often raining, most persistent early and late
Several hours of constant rain from dawn, heavy over western hills, breaking for several afternoon hours of lighter patchy rain and drizzle. Later, prolonged heavier rain setting in again onward into evening.
Cloud on the hills?
Extensive, lowest southwest
Blanket low cloud across hills, to lower elevations near coasts in west. Mostly above 600m inland with some higher breaks north/east of the A5; some higher breaks are possible though ragged patches will cling to lower slopes.
Chance of cloud free summits?
Below 10%
Sunshine and air clarity?
Overcast and murky. Very poor visibility but better locally toward east if drier for a time.
How Cold? (at 900m)
Rising from before dawn to 6C, soon up to 8C and remaining elevated through afternoon; only small fall with height. Feeling like -5C directly in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 12th November 2025
Last updated
Mon 10th Nov 25 at
4:07PM
How windy? (On the summits)
South-southwesterly 20-30mph, possibly less for a time, but risk strengthening later, 40mph into evening.
Effect of the wind on you?
Risk blustery over exposed terrain, though may be fairly small for periods. Later in day possibly deteriorating.
How Wet?
Patchy drizzle, then risk heavier rain
Very wet underfoot with streams in spate and flooding following previous rain. Some drizzly rain onto western hills, increasing risk with time of more persistent then heavier rain returning.
Cloud on the hills?
Fairly extensive, some breaks north
Banks of cloud from lower elevations upward in the morning, may linger particularly western hills. Breaks mostly Carneddau. Lowering widely in rain.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, varied layers of cloud. Misty areas may linger, locally good visibility mainly toward north.
How Cold? (at 900m)
8C. Feeling like 0C or below if in stronger wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 13th November 2025
Last updated
Mon 10th Nov 25 at
4:07PM
How windy? (On the summits)
Southwesterly 25-35mph. Trending lighter as afternoon goes and may become variable in a lull - detail uncertain.
Effect of the wind on you?
Walking strenuous in exposure much of the day, though conditions tend to ease through afternoon.
How Wet?
Showery rain, may ease
Periods of showery rain through morning, these tending ease as the day goes though a risk of returning for periods, most likely on northern slopes.
Cloud on the hills?
Mostly high tops and west slopes
Fog will cling to the Snowdon summits and down to the middle slopes facing Cardigan Bay likely all day. Banks with higher bases will drift towards Carneddau and east Wales, at times clearer here, though may trend more variable later.
Chance of cloud free summits?
10%; 40% east Wales
Sunshine and air clarity?
Patchy-to-frequent sunshine east Wales, little sun to the west. Visibility very good, though locally poor in rain.
How Cold? (at 900m)
7C; may lower towards 5C later in the day, detail uncertain. Feeling near or below freezing in wind.
Freezing Level
Above the summits.
Planning Outlook
Periods of heavy rain for many over several day; further flooding for Wales, the Lakes and southwest Scotland. Cooler than recently in Scotland with freezing levels lowering to most high terrain, snow showers falling on high terrain from the north; remaining generally mild England and Wales by day and night. Later in the week and into the weekend, high pressure draws colder air into Scotland and progressively further south into England and Wales over the weekend. Strong easterlies are likely over England and Wales and conditions will be largely dry with some clear hills and sunny bursts; overnight frosts likely widespread in Scotland. The weather regime the following week is uncertain but first indications suggest more unsettled weather.