Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Click an icon for more information or click here for a key to all icons.
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
Saturday 8th November 2025
Last updated
Fri 7th Nov 25 at
3:54PM
Summary for all mountain areas
Morning rain in western Scotland with fog on most high terrain; lower and more extensive fog central and southern highlands. A misty, drizzly start on high terrain of England and Wales, though improving - cloud increasingly broken, particularly east of high tops. Feeling mild in moderate winds, a slight cooling later.
Headline for Eryri / Snowdonia National Park
Drizzle and fog high tops and west; many slopes becoming clear
How windy? (On the summits)
Westerly 15-20mph. Through afternoon, trending southwesterly and gradually strengthening towards 25mph by dusk, rising further into nighttime.
Effect of the wind on you?
Fairly small.
How Wet?
Drizzle and showers soon fading
A few showers drift onto western slopes from Cardigan Bay in the morning. Also drizzly over the high tops in fog for several hours after dawn. Showers and drizzle with both ease for a dry afternoon.
Cloud on the hills?
Fairly extensive early, becoming well-broken
From dawn fairly extensive above 600m, with local patches further down including valley mist. Bases rising with time and cloud increasingly broken east of highest tops where many slopes will clear. Cloud will cling to high tops and western high terrain.
Chance of cloud free summits?
30% west, rising to 60% east Wales
Sunshine and air clarity?
Cloudy early, bursts of sunshine increasingly common, most frequent east of high tops. Visibility becomes good after early mist lifts but a haze will linger.
How Cold? (at 900m)
5 or 6C. Feeling below freezing if exposed to stronger sustained wind on high tops.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 9th November 2025
Last updated
Fri 7th Nov 25 at
3:54PM
How windy? (On the summits)
A swathe of 35-45mph winds passes west to east through the day, risk 50mph over tops. May ease a bit from the west later.
Effect of the wind on you?
Difficult conditions with considerable buffeting and wind chill. May ease later though remaining strenuous.
How Wet?
Raining most of the day
Frequent rain soon arrives onto western slopes, spreading east and becoming widely persistent for several hours. Heaviest rain on slopes facing the Lleyn peninsula.
Cloud on the hills?
Extensive
Extensive cloud soon sets in, likely all day on slopes facing Cardigan Bay and the Lleyn peninsula. Higher bases towards Carneddau and east-Wales, particularly at dawn, though largely extensive above 600m.
Chance of cloud free summits?
Less than 10%
Sunshine and air clarity?
A few bright periods on northern slopes early where visibility will be good, but elsewhere foggy and dull.
How Cold? (at 900m)
7 or 8C. Feeling like -5C in direct wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 10th November 2025
Last updated
Fri 7th Nov 25 at
3:54PM
How windy? (On the summits)
Southwesterly 15-25mph.
Effect of the wind on you?
Fairly small
How Wet?
Showers in the west
Intermittent showers drift onto slopes from northern Cardigan Bay towards Snowdon - some showers may be heavy. A risk of merging into a broader area of heavy rain, though detail uncertain.
Cloud on the hills?
Mostly high tops and west slopes
Fog banks at various heights at dawn, soon lifting and fading after sunrise. Cloud will come and go on western slopes with the showers, variably above 600-700m. Many hills often clear, particularly near Carneddau, but highest tops may often be capped.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Often sunny north and east of high summits, more patchy south and west. Excellent visibility.
How Cold? (at 900m)
5C
Freezing Level
Above the summits
Planning Outlook
A cloudy and wet week ahead as several low pressure cores draw frontal systems across the British Isles. Rain at times extensive and heavy, streams in spate with a risk of flooding, primarily western mountains. Winds start fairly light but soon increase with gales becoming widespread by Tuesday, which may persist for several days. Temperatures remain mild until later in the week when cold air begins pushing into northern Scotland - timing and extent of the arrival of cold air remains uncertain but high terrain of Scotland and possibly northern England may start to see more snow around or after next weekend.