Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
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 4th June 2026
Last updated
Wed 3rd Jun 26 at
4:28PM
Summary for all mountain areas
Rain and showers in Scotland, showers heaviest east afternoon with risk of thunder. Light wind early, increasingly blustery from south. Persistent rain and windy south Scotland and Lakeland/N Pennines. Very windy Peak District and Wales too, gales later, morning rain and afternoon showers.
Headline for Eryri / Snowdonia National Park
Morning rain, afternoon showers; windy, particularly later
How windy? (On the summits)
Southwest soon westerly, 25 to 35mph, perhaps stronger just before dawn. Some speed variability, and strengthening later in the day to 30-40mph.
Effect of the wind on you?
Strenuous walking conditions for much of the day on high ground, some lighter moments but deteriorating widely late in the day.
How Wet?
Morning rain and afternoon showers, regularly heavy
A band of persistent rain sweeps east across the mountains for several morning hours. Once clear, a brief dry window with just fine drizzle over the summits, then showers stream in from the west, soon frequent and heavy with some risk of lightning.
Cloud on the hills?
Fairly extensive, varied, breaks east
Fairly extensive to at least middle slopes during morning rain. Lifting as rain clears, but covering higher slopes frequently, persistently in western areas above 700-800m, patches to lower slopes during and after rain; tending to lift higher afternoon with some breaks east of high hill groups.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Some glimpses of sun afternoon in the east; any sunshine unlikely west of high hill groups. Visibility occasionally good below cloud, best chance afternoon east, but reduced in rain, at times poor.
How Cold? (at 900m)
6 or 7C, little change during the day; may reach 8C Berwyn group. A notable drop in the later overnight hours. Feeling near -5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 5th June 2026
Last updated
Wed 3rd Jun 26 at
4:28PM
How windy? (On the summits)
Westerly 30-35mph at dawn, gusty over tops, soon easing, 20-25mph. Shifting southwesterly too, later 15-20mph.
Effect of the wind on you?
Strenuous walking in exposure with notable wind chill early, effects gradually easing, fairly small later.
How Wet?
Spotty rain, some drizzle
Spots of light rain here and there, some drizzle in cloud on high tops; plenty of dry windows too, little precipitation towards Carneddau. Some risk of later afternoon showers mid-Wales.
Cloud on the hills?
Mostly west, lifting to high terrain with breaks
Fairly extensive above 600m in the west in the morning, bases towards 700-800m in the east; lifting through morning, breaking up somewhat, many hills clearing, though Yr Wyddfa may only see short breaks; best breaks early/mid afternoon.
Chance of cloud free summits?
Rising to 70% by later afternoon
Sunshine and air clarity?
A patchwork of sunshine. Good visibility.
How Cold? (at 900m)
3 or 4C at dawn, rising to 7C, little drop into night. Feeling like -5C in strongest early wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 6th June 2026
Last updated
Wed 3rd Jun 26 at
4:28PM
How windy? (On the summits)
S-SE'ly, then SW'ly, high uncertainty of extent of stronger winds - likely in range 35 to 50mph, but risk 60mph for a time.
Effect of the wind on you?
Beware of changing conditions and monitor subsequent forecasts - risk often arduous, difficult for a time.
How Wet?
Risk periods of heavy rain
Patchy rain likely from before dawn, may be initially small amounts into morning, but risk of more persistent heavier rain developing - timing of this uncertain. Rain and some heavier bursts continuing later in day.
Cloud on the hills?
Fairly extensive
Shrouding many hills much of day, especially more western areas, from low-mid slopes upward especially in rain, highest bases toward Carneddau if drier.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, mostly dull, poor visibility in rain, locally better if dry northern areas for a time; may start to improve later in west.
How Cold? (at 900m)
5C rising to 8C afternoon, then lowering into evening-night. Feeling below freezing in the wind.
Freezing Level
Above the summits.
Planning Outlook
Friday sees a slight settling trend compared to recent days with sunny spells in east Scotland as well as England and Wales, some patchy showers. Unsettled again over the weekend, as southwesterly flow draws several areas of rain across the country, best of dry slopes to the northeast. Showers affect most hills Monday and Tuesday, lowest cloud and most persistent rain along western slopes, but with some breaks as well with sunshine. Wednesday is likely more unsettled as gales spread across most tops and heavy rain drives into northwest England and Scotland. Conditions settling into the weekend as high pressure builds from the south. Low cloud will gradually dissipate for increased sun. Scotland slower to settle, some cloud and drizzly rain lingering in the west.