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.
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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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.
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
Thursday 1st October 2026
Last updated
Wed 30th Sep 26 at
4:15PM
Summary for all mountain areas
Showery outbreaks in Wales and west Scotland, early hill cloud tends to lift with breaks. Showers well-scattered elsewhere, early hill cloud largely clears. Showers lessen widely, often sunny though some haze. Mild temperatures, warm valleys afternoon; west Scotland starts cool, feeling chilly in a blustery wind.
Headline for Eryri / Snowdonia National Park
Frequent early showers ease, plentiful sun
How windy? (On the summits)
Southwesterly 20-25mph, some gustiness to start. Trending stronger later, finishing at sustained 30mph and rising further overnight.
Effect of the wind on you?
At times blustery in exposure with some buffeting in gusts and wind chill. Deteriorating overnight.
How Wet?
Showers generally easing
From dawn, showers streaming onto the mountains from the southwest, drizzly on the tops and towards Cardigan Bay. Drizzle will fade and showers gradually scattering with time, only local spots if any into evening.
Cloud on the hills?
Clinging to high west terrain
At dawn fairly extensive from 600-700m upward west slopes, lower in showers; well broken Carneddau/Berwyn groups. Soon beginning to lift, some variability, soon above Carneddau. Banks likely cling to Snowdon with a few lower patches towards Cardigan Bay, a few windows of clear tops possible.
Chance of cloud free summits?
Rising to 50%
Sunshine and air clarity?
Patchy sunshine, extended sunny spells breaking out east of high terrain. High cloud building from the west later in the day. Good visibility, some haze which will thicken a bit.
How Cold? (at 900m)
8C, rising a degree east of high terrain. Around showers, temperature will fluctuate a few degrees.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 2nd October 2026
Last updated
Wed 30th Sep 26 at
4:15PM
How windy? (On the summits)
Southwesterly 30-35mph, will vary both above and below this range, gusts approaching 45mph.
Effect of the wind on you?
Strenuous conditions on exposed tops, strongest gusts affecting balance with notable wind chill.
How Wet?
Rain most of the day
Rain on high terrain and western areas towards Cardigan Bay, steady heavy falls which may last for several hours. Falls less heavy towards Carneddau, a few patchy breaks, but extended falls here too.
Cloud on the hills?
Extensive, may vary on low slopes
Cloud rarely breaks above 600-700m, and slopes towards Cardigan Bay more likely shrouded to or below 400m much of the day. Bases generally higher towards Carneddau, some chance breaking towards high terrain, likely only brief.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast, often dull particularly towards the west. Hazy at best, poor visibility on high terrain.
How Cold? (at 900m)
9 or 10C. Feeling like 0C in strongest direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 3rd October 2026
Last updated
Wed 30th Sep 26 at
4:15PM
How windy? (On the summits)
West-southwesterly 10-15mph, stronger for a few early hours, to 25mph briefly.
Effect of the wind on you?
Mostly small.
How Wet?
Early rain
Rain fairly widespread before dawn, perhaps heavy on high terrain and western slopes. From dawn, rain will ease and break up, a little drizzle perhaps lingering on high western terrain briefly.
Cloud on the hills?
Probably clearing most hills
Cloud shrouds high terrain to start, most extensive towards Cardigan Bay, briefly to at least middle slopes. Cloud will lift and break up as morning goes, and perhaps substantially clearing. Amount of clearing uncertain towards mid-Wales; greatest risk of sustained cloud on west aspects.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Intermittent sun breaking out. Visibility becomes good.
How Cold? (at 900m)
8C.
Freezing Level
Above the summits.
Planning Outlook
Friday starts the weekend with windy and damp weather, rain quite frequent with extensive cloud for some. On Saturday, higher pressure expands from the south, gradually settling the weather in England and Wales. Scotland remains breezy with cloud and showers, mostly impacting western regions. The following week remains mixed: high pressure to the south and west bringing some windows of brighter, drier weather primarily to England and Wales, but active low pressure systems will break through as well for spells of widespread wind, sometimes gale force, and bands of rain followed by showers. Precise timing of settled versus unsettled weather is currently uncertain. Temperatures variably mild to cool, beginning to reach freezing on Scottish summits, or lower down on clear nights.