Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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.
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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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.
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
Sunday 25th October 2026
Last updated
Sat 24th Oct 26 at
4:12PM
Summary for all mountain areas
Severe conditions across the mountains: storm-force wind, to hurricane force over Munros well into the day; severe wind chill. Frequent showers with hail in England and Scotland, persistent Scottish Highlands with snow on tops; risk of flooding. Scattered showers Wales, becoming scattered further north.
Headline for Eryri / Snowdonia National Park
Storm-force wind and showers, both tending to lessen
How windy? (On the summits)
West-northwesterly 55-65mph in morning, gusts approaching 80mph on highest tops; speeds tending to lower to finish around 45mph, further lessening into night.
Effect of the wind on you?
Severe conditions well into the day, mobility challenging with severe wind chill; may improve a little, but still arduous walking through all of daylight.
How Wet?
Showers, tending to lessen
Showery rain most frequent in the morning, some hail mixed in with heavier bursts, possible sleet or wet snow highest tops. Fewer showers east and becoming more scattered afternoon, but extended dry windows are unlikely during daylight.
Cloud on the hills?
Fairly extensive but tending to lift
Cloud base varying, but often capping western tops above 700-800m, rarely clearing in morning, some banks to 600m or lower in showers. Breaks more often in east and more widely afternoon, perhaps briefly to high tops between showers.
Chance of cloud free summits?
20% rising to 50%
Sunshine and air clarity?
Brief bursts of sun, mostly east; more often cloudy on high western terrain. A general haze, poor visibility in showers, tending to improve, more often good east.
How Cold? (at 900m)
2 or 3C. Wind chill feels like -10 to -15C in exposure.
Freezing Level
Just above highest summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 26th October 2026
Last updated
Sat 24th Oct 26 at
4:12PM
How windy? (On the summits)
Southerly 30mph just at dawn, strengthening and shifting southwesterly 50-65mph with powerful gusts.
Effect of the wind on you?
Walking becomes difficult, maintaining balance a near-constant effort and feeling chilly despite mild temperature.
How Wet?
Rain much of the day
Rain sets in from dawn into morning, several hours of persistent falls with heavy moments, particularly on and west of high terrain. Will ease afternoon though remaining drizzly on high terrain with patchy rain at times.
Cloud on the hills?
Extensive
Blanket cloud over the mountains, to low slopes in many places, to valley level south and west of high terrain. A few breaks approach 600m towards Carneddau as rain eases.
Chance of cloud free summits?
Less than 10%
Sunshine and air clarity?
Overcast, largely dull on high terrain, poor visibility. A few bright glimpses may form afternoon to the north and east, but a building haze too.
How Cold? (at 900m)
Starting around 5C, sharply rising to 11C. Feeling below 0C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 27th October 2026
Last updated
Sat 24th Oct 26 at
4:12PM
How windy? (On the summits)
Southwesterly 45-55mph, gusty around showers. Trending westerly, beginning to lessen slightly later.
Effect of the wind on you?
Arduous walking at least, some more challenging moments in exposure in gusts with significant wind chill.
How Wet?
Showers
Showers come and go most of the day, largest rainfall totals west of high terrain, and perhaps some heavier bursts for a few afternoon hours; a little sleet possible on high tops. Tending to lessen as evening approaches.
Cloud on the hills?
Tops largely capped, varied base
Base highly variable, between 500-800m western slopes, only rare breaks towards high summits later in the day. Better breaks towards east-Wales, regularly clearing summits, some risk of more widely lower cloud during heavier showers.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Glimpses of sun, longer sunny windows east Wales. A haze around, visibility often poor on high terrain, particularly west.
How Cold? (at 900m)
3 or 4C. Feeling like -5 to -10C in direct wind.
Freezing Level
Above the summits.
Planning Outlook
Unsettled weather persists into early next week. A relative lull in the early hours on Monday for north Scotland before the next weather system soon sweeps in from the southwest with drizzle, some heavy rain, and extensive mountain gales. Temperatures will be unseasonably mild. Rain breaks into showers for most on Tuesday with cooling temperatures, becoming snow on high terrain. Gales remain widespread, severe conditions persist over Scottish Highlands. Pressure slowly builds from the south into Wednesday and Thursday; staying blustery, cloud and some showers affecting western areas, but bright spells breaking out, briefly more settled in England and Wales. Confidence in forecast detail is low into next weekend, but western hills are likely wet again, more widely cloudy with cool to mild temperatures.