Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Thursday 8th October 2026
Last updated
Wed 7th Oct 26 at
3:26PM
Summary for all mountain areas
Early showers in north Scotland and Wales will fade, widely dry and bright conditions for several midday/afternoon hours. Cool-to-chilly, little wind. High cloud builds west, wind and rain arriving to west Scotland afternoon, spreading east and into England and Wales as evening approaches, deteriorating into night.
Headline for Eryri / Snowdonia National Park
Morning showers fade to chilly sun; high cloud builds, late rain
How windy? (On the summits)
Northwesterly 25-30mph to start, lessening and shifting westerly, 15-20mph, later shifting more southwesterly and restrengthening, towards 30mph evening and rising further overnight.
Effect of the wind on you?
Blustery in exposure to start, becoming fairly small well into the day, the significantly deteriorating into nighttime.
How Wet?
Morning showers gradually ease, then dry until late
From dawn, showers push onto most hills from the north, some local steady falls but tending to break up. Patchy rain returns from the west late in the day, exact timing uncertain but quickly becoming frequent into night.
Cloud on the hills?
Often covering tops, some afternoon breaks
Cloud banks cover high tops in the morning, lower bases towards the north and west during showers, locally towards 600-700m. Cloud largely isolates to tops, a few breaks forming afternoon, but then returning extensively evening into night.
Chance of cloud free summits?
30% rising to 60%, lowering again late in the day
Sunshine and air clarity?
Patchy sun, a sunnier window likely afternoon, then high cloud arrives and thickens as afternoon goes. Very good visibility, perhaps a little haze.
How Cold? (at 900m)
3C, rising a degree during daylight, then sharply rising overnight to 10C or above.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 9th October 2026
Last updated
Wed 7th Oct 26 at
3:26PM
How windy? (On the summits)
Westerly sustained 45-55mph early, lessening to around 35-40mph afternoon, but very gusty, approaching 60mph+ early.
Effect of the wind on you?
Arduous conditions in exposure all day, gusts constantly challenge balance, more difficult early. Notable wind chill.
How Wet?
Early rain, then showers forming
Rain and drizzle from overnight into morning, a brief heavy burst, then a dry window. Scattered showers afternoon, trending more frequent, particularly into night.
Cloud on the hills?
Extensive early, the varied on high terrain
Blanket low cloud to start, fog patches into valleys west of high terrain. Cloud will lift and break up rapidly as midday approaches, then cloud variably coming and going above 800-900m. Hills east of highest tops substantially clear.
Chance of cloud free summits?
Rising to 60%
Sunshine and air clarity?
Overcast and dull to start, clearing to mostly sunny with good visibility. Patchy high cloud tending to build.
How Cold? (at 900m)
Starting around 11C, suddenly cooling to around 6C. Feeling like -4 to -8C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 10th October 2026
Last updated
Wed 7th Oct 26 at
3:26PM
How windy? (On the summits)
Westerly 35-50mph, quite gusty, may lessen somewhat later.
Effect of the wind on you?
Challenging conditions in exposure likely all day, considerable buffeting always affecting balance. Significant wind chill.
How Wet?
Showers
Showers stream in from the northwest most of the day, generally light but a few heavy bursts and extended falls may occur.
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 summits will see breaks during dry windows.
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)
4C. Feeling like -7 to -10C in strongest wind.
Freezing Level
Above the summits.
Planning Outlook
Rain, low cloud and strong upland winds across Britain overnight into Friday morning. Friday and Saturday are windy and showery with bright breaks, a risk of severe gales on many summits. Sunday sees a more settled day as a small ridge of high pressure builds from the west; wind eases, plenty of bright breaks, cool temperatures. Next week sees continued mixed weather: bands of rain coming and going, temperatures similarly fluctuating: generally mild, but sometimes chilly in Scotland with freezing levels lowering onto high Munros where rain turns to snow; any accumulating snow soon thaws. Westerly wind will be dominant, often quite strong, gales at times, but this allows for drier, brighter windows on eastern hill groups between weather systems.