Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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 16th November 2025
Last updated
Sat 15th Nov 25 at
3:49PM
Summary for all mountain areas
Snow flurries (rain lower down) arrive in northwest Scotland early and slip into the central highlands. Mixed cloud and sun for southern Scotland and England; only odd light showers on easternmost hills, many hills clear. Drizzly showery rain early in Wales, abating with cloud lifting to high slopes.
Headline for Eryri / Snowdonia National Park
Morning light rain; dry afternoon with lifting cloud
How windy? (On the summits)
East, trending northeasterly, 15-20mph; some stronger gusts over the high tops and passes, particularly early.
Effect of the wind on you?
Fairly small effects for most but buffeting gusts and feeling cool in exposure.
How Wet?
Light showers
A little rain in the wind at times, occasional light showery rain mostly Carneddau to areas near Bala, mainly morning. Afternoon likely entirely dry.
Cloud on the hills?
Fairly extensive early, improving, best west
Banks of cloud drifting over slopes above 600 to 800m in the morning, lowest and most extensive in areas toward north and east though perhaps more widespread. Tending to lift and break, best of clear slopes (some tops too) towards Cardigan Bay.
Chance of cloud free summits?
20% rising to 70%
Sunshine and air clarity?
Mostly cloudy at first, sun breaking through with time, notably west. Visibility tending to improve to be very good.
How Cold? (at 900m)
2 or 3C (small change of temperature with height above 700m). Slowly dropping to 0C around and after dusk. Feeling like -5 to -8C in exposure to wind.
Freezing Level
Lowering to just above freezing on upper slopes later in the day, further dropping overnight.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 17th November 2025
Last updated
Sat 15th Nov 25 at
3:49PM
How windy? (On the summits)
Northeasterly 25-30mph. Substantially easing afternoon, perhaps a lull for several hours.
Effect of the wind on you?
Walking strenuous with wind chill in the morning, trending towards minimal impacts.
How Wet?
No rain expected
Cloud on the hills?
Only high slopes of northern hills
Cloud will come and go on high northern slopes likely all day, most frequently around Carneddau. Hills clear elsewhere, some local valley fog patches are possible.
Chance of cloud free summits?
60% northernmost tops, 90% elsewhere
Sunshine and air clarity?
A patchwork of cloud and sun on northernmost slopes, sunshine elsewhere. Excellent visibility.
How Cold? (at 900m)
-1C Feeling like -10C in strongest morning wind.
Freezing Level
900m lowering to 700-800m. Frost is likely to lower elevations at dawn as well.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 18th November 2025
Last updated
Sat 15th Nov 25 at
3:49PM
How windy? (On the summits)
Westerly 30-35mph. A small risk of stronger winds late in the day.
Effect of the wind on you?
Walking likely strenuous much of the day with wind chill. Risk of deteriorating conditions into night.
How Wet?
Showers, then rain slowly sets in
Showers drift onto western hills through the morning, some snow flurries on the high tops. Showers trend towards areas of rain afternoon, perhaps setting in for periods later.
Cloud on the hills?
Banks west, more widely afternoon
Banks of cloud come and go above 600m on western hills from dawn. High breaks east, particularly Berwyn group where summits may be often clear for several hours. Cloud fills in more widely with bases lowering as rain arrives.
Chance of cloud free summits?
50% lowering to 20%
Sunshine and air clarity?
Bright in the east in the morning, gradually becoming overcast. Excellent visibility, turning poor with rain, very poor on high ground.
How Cold? (at 900m)
0C Feeling like -10C in direct wind.
Freezing Level
800-900m, including frosts in sheltered valleys. May rise to or above the high tops.
Planning Outlook
Cold air spreads widely across the country; staying below freezing over higher mountains most likely throughout the next week with morning frosts to lower elevations. Snow flurries move in onto slopes exposed to coasts; snow most frequent toward north of the Highlands with some locally more substantial accumulations over higher terrain. Sunny and dry for many away from the coasts on the northerly wind. Tuesday and Wednesday are more unsettled: broader areas of snow and rain pass southward with variable wind - navigation could become challenging in the Scottish Highlands on Tuesday with notable snow accumulations. West-northwesterly winds will likely return into next weekend, brining periods of rain and strong winds with intermittent drier, brighter spells.