Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 26th October 2026
Last updated
Sun 25th Oct 26 at
4:02PM
Summary for all mountain areas
A warm front pushes into Wales around dawn, spreading north and east bringing at least several hours of rain to all mountains, heavy for a time. Becoming unseasonably mild and humid in rain, though feeling cool in widespread gales. North and east Scotland drier and chilly for a few early hours.
Headline for Eryri / Snowdonia National Park
Gales, rain, and drizzle; poor visibility
How windy? (On the summits)
Southerly 30mph just at dawn, rapidly strengthening and shifting southwesterly 50-65mph with powerful gusts over tops and downslope to the north; speeds may strengthen into evening.
Effect of the wind on you?
Walking soon challenging, maintaining balance a near-constant effort, not just on high tops, and may become more difficult later. Feeling chilly despite mild temperature.
How Wet?
Morning rain eases into afternoon drizzle
A few spots of rain from overnight soon set in, persistent through morning with heavy moments, particularly over and west of high terrain. Rain will break afternoon though remaining drizzly on high terrain with patchy rain returning at times, mostly western hills.
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 during morning heavier rain. A few breaks approach 600m towards Carneddau as rain eases.
Chance of cloud free summits?
Less than 10%
Sunshine and air clarity?
Overcast, 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, or cooler from overnight, soon sharply rising to 11C, or locally a degree warmer Carneddau area. Only small change with height and quite humid. Feeling below 0C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 27th October 2026
Last updated
Sun 25th Oct 26 at
4:02PM
How windy? (On the summits)
Southwesterly 45-55mph, gusty around showers. Trending westerly and lessening slightly, 35-40mph 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 east-Wales, regularly clearing summits, some risk of more widely low cloud during heavier showers briefly.
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, or a degree higher just at dawn (milder from overnight). Feeling like -5 to -10C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 28th October 2026
Last updated
Sun 25th Oct 26 at
4:02PM
How windy? (On the summits)
Southwesterly 35-45mph, trending westerly and lessening, 20-25mph; some gustiness in exposure.
Effect of the wind on you?
Strenuous walking from dawn, balance a challenge in exposure with considerable wind chill; effects lessening.
How Wet?
Rain and drizzle, mostly west early
A period of steady rain just around dawn, may persist for longer over high tops and slopes facing Cardigan Bay, but soon breaking into patches. Some high terrain drizzle as well, but ultimately easing, later largely dry.
Cloud on the hills?
Lifting to high terrain
May be fairly extensive around dawn, lifting and breaking up, areas around Carneddau first to see high breaks towards summits. Snowdon group and western slopes will be often covered above 800m, some variability and rising chance a few higher breaks with time.
Chance of cloud free summits?
20% rising to 50%
Sunshine and air clarity?
Sun increasingly breaking out, particularly east. Hazy, best visibility east Wales.
How Cold? (at 900m)
7C. Feeling like -5C at first, wind chill effect lessening.
Freezing Level
Above the summits.
Planning Outlook
Low pressure north of Scotland on Tuesday brings showers with widespread gales, severe over Scottish Highlands with steady, heavy rain, turning to snow on high tops. Pressure builds from the south Wednesday but staying blustery with rain on and off for many, hill cloud clinging to high terrain, and haze towards the west coast. Wind will lessen and shift southerly on Thursday, more bright breaks, milder temperature, and little or no rain remaining. A frontal system brings rain and wind into western areas on Friday, pushing east into evening and perhaps a very unsettled start to Saturday, but then a trend towards high pressure is indicated as the weekend goes. Northwest areas stay cloudier and blustery into Sunday, then more widely settled early next week and possibly longer, cool to mild temperatures.