Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday'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.
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.
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
Friday 31st October 2025
Last updated
Thu 30th Oct 25 at
4:12PM
Summary for all mountain areas
Widespread gales; difficult conditions are likely on high summits. Morning showers onto west coast hills, a substantially dry morning in southeast Scotland and Pennines. A broader area of rain sweeps across all areas through afternoon - several hours of persistent rain for most; a risk of local flooding in the West Highlands.
Headline for Eryri / Snowdonia National Park
Light rain, setting in widely for several hours; gales
How windy? (On the summits)
Southerly, speeds increasing quickly with height to between 40 to 50mph and perhaps on higher westernmost summits 60mph at times.
Effect of the wind on you?
Widely difficult walking and significant wind chill in upland gales. Be aware of sudden rises in wind speed on the higher summits.
How Wet?
Morning spotty rain sets in afternoon
Light rain on and off through morning, most often on slopes near Cardigan Bay. Rain sets in rather quickly from midday, frequent to persistent for much of the afternoon with heavy moments.
Cloud on the hills?
Mostly higher slopes, more widespread in rain
Rolls of cloud covering some higher areas, mostly above 800m. Cloud base may be much lower, near 600m close to Lleyn peninsula. Cloud will be more widespread over high terrain during rain.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Weak sunshine at times, mainly east Wales. Overcast for several hours around midday. Very good or excellent visibility, but misty in rain.
How Cold? (at 900m)
7 or 8C. Will feel more like -5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 1st November 2025
Last updated
Thu 30th Oct 25 at
4:12PM
How windy? (On the summits)
Southwesterly in the range 30 to 40mph; particularly gusty near precipitation.
Effect of the wind on you?
Walking arduous most of the day with considerable wind chill, particularly during gusts around rain.
How Wet?
Showers, turning heavy
Sudden showers, may well become heavy afternoon with hail and isolated thunder, including after dark.
Cloud on the hills?
Extensive on higher summits, improving
Cloud widely covering higher areas at dawn. Will improve as cloud base rises to 800-900m, higher and well broken Carneddau and east. Base will abruptly lower in showers.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief patches of sun, mainly east Wales. Very good visibility but abruptly poor in showers.
How Cold? (at 900m)
4C dropping toward 2C. Will feel as cold as -11C directly in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 2nd November 2025
Last updated
Thu 30th Oct 25 at
4:12PM
How windy? (On the summits)
West-southwesterly 30-35mph. Speeds rising significantly overnight.
Effect of the wind on you?
Walking often strenuous, particularly in exposure; stability increasingly challenged. Feeling chilly.
How Wet?
Mostly western slopes
Periods of drizzly rain drifting onto westernmost slopes. A risk of a longer period of rain afternoon from Snowdonia into mid-Wales though always primarily on western slopes.
Cloud on the hills?
Mostly just west slopes, well-broken
Banks of cloud regularly drift onto upper western slopes and over tops, though frequently broken for clear hills. Only odd caps over highest tops to the east after some morning lower banks lift and clear.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Often sunny in the east, more patchy on slopes near Cardigan Bay. A haze on slopes facing the coast, better visibility inland.
How Cold? (at 900m)
2 or 3C. Feeling like -8 to -10C in direct wind.
Freezing Level
Just above the highest summits at dawn, rising further above tops after sunrise.
Planning Outlook
An extended period (well into November) of frequent rainfall, particularly western mountains where widely considerable accumulation. Atlantic winds will be often strong, gale force at times. Temperatures generally near or above average: brief interludes in Scotland where freezing level drops below higher summits. Brighter periods will occur between broader areas of rain, best of cloud clearing hills away from the west coast. A few brief settled periods will occur as well, though timing is uncertain. First indications suggest one of these more settled periods could occur next weekend.