Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate 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.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 10th October 2026
Last updated
Fri 9th Oct 26 at
4:00PM
Summary for all mountain areas
Westerly gales across many mountains will make walking challenging and bring significant chill factor; air temperature close to freezing point on highest summits. Rain most persistent in western Scotland, snow falling on high tops. Frequent showery rain for northwest England, fewer showers south across Wales.
Headline for Eryri / Snowdonia National Park
Gales on mountains; showery rain.
How windy? (On the summits)
Westerly 35 to 45mph, quite gusty, in places 50mph highest tops in morning, tending to drop somewhat afternoon to 30-35mph. Gradually lowering further onward into night.
Effect of the wind on you?
Challenging conditions in exposure particularly in morning, considerable buffeting always affecting balance, moderating a little. Significant wind chill.
How Wet?
Showers, most often west
Showers stream in from the northwest most of the day, generally light but a few heavy bursts and extended falls over western hills, may fade for a time then return again later.
Cloud on the hills?
Mostly northwest areas, highly variable
Cloud base will vary considerably, typically between 600-900m, lowest during showers on northwestern aspects. Summits east of highest Snowdon group will see breaks during dry windows, clearest well inland/east.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Patchwork of cloud and sun, more often cloudy northwest Snowdonia NP. Varied visibility, sometimes poor in rain and also a haze.
How Cold? (at 900m)
3 or 4C. Feeling like -7 to -10C in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 11th October 2026
Last updated
Fri 9th Oct 26 at
4:00PM
How windy? (On the summits)
Northwesterly 20mph from dawn soon easing to 10-15mph. Turning southerly afternoon, rising later, 40mph into night.
Effect of the wind on you?
Soon becoming small. Feeling more noticeably breezy later in daytime.
How Wet?
Largely dry
Brief scattered showers in morning, mostly west coast hills, fading to be largely dry. Rain then pushes in from west evening into night.
Cloud on the hills?
Clearing tops
Patchy cloud drifting over some higher slopes mainly in western areas in the morning, but likely all dispersing or lifting above tops.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Patchwork of cloud and sun; a veil of high cloud tending to thicken. Visibility excellent.
How Cold? (at 900m)
4 or 5C much of day, then lifting slightly higher onward into evening-night. Feeling like -3C in early wind.
Freezing Level
Above the summits. Slight frost inland valleys at dawn.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 12th October 2026
Last updated
Fri 9th Oct 26 at
4:00PM
How windy? (On the summits)
South-southwesterly 20 to 30mph, then late in day likely to increase, to 50mph most likely after dark.
Effect of the wind on you?
Fairly small, but blustery around higher exposed terrain, likely to deteriorate onward into evening-night.
How Wet?
Generally damp, some steady rain
Rain and drizzle most persistent over west coastal hills and Llyn peninsula, some steady or heavier rain more widely early and late. Patchier smaller amounts toward north and east, sometimes easing off.
Cloud on the hills?
Extensive, local breaks north
Shrouding most hills all day, from lower elevations toward west coast, rarely above 400-500m inland. Higher bases north from Ogwen valley, occasional breaks above 600m. Perhaps an improvement afternoon.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast, dull or murky. Local brighter moments north and during afternoon.
How Cold? (at 900m)
10 or 11C, little change day and night. Feeling near to freezing if in stronger wind.
Freezing Level
Above the summits.
Planning Outlook
After a fine but cool day on Sunday, damp and mild southwesterly air moves back across the country into Monday. Southwesterly winds strengthen late Monday to widely gale-force over the hills, heavier rain likely into early Tuesday, followed by showers and a slight drop of temperature. Very unsettled west-southwesterlies continue into midweek - sustained mountain gales, possibly stormy at times and spells of heavy rain for all areas. A changeable westerly theme likely continues beyond mid-month - occasional windows of drier weather, but more often windy with rain or showers coming in from the Atlantic, sometimes cold enough to fall as snow on Scottish high tops.