Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday'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.
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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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.
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
Wednesday 3rd June 2026
Last updated
Tue 2nd Jun 26 at
3:39PM
Summary for all mountain areas
A band of rain sweeps across the country bringing several hours of persistent rain and extensive fog: first in Wales, then England and much of Scotland by early afternoon. Breaking to frequent showers, risk isolated lightning. Very windy England and Wales, gales over Wales summits.
Headline for Eryri / Snowdonia National Park
Rain soon sets in, afternoon showers; gales over tops
How windy? (On the summits)
Shifting southerly from southwesterly just before dawn, speeds already 30-40mph as day breaks, tops speeds reach 50mph over summits. Shifting southwesterly from midday, speeds at least 40mph for several afternoon hours, max speeds to 55-60mph.
Effect of the wind on you?
Walking soon arduous, and probably often challenging in exposure through afternoon. Balance will constantly be challenged with significant wind chill.
How Wet?
Heavy rain, drizzle, then showery
Rain extends in from west early in day, soon fairly persistent, heavy for a time especially west, drizzly even when heavier rain fades. Showery bursts afternoon into evening, chance isolated thunder, some drier moments north and east.
Cloud on the hills?
Extensive
Blanket low cloud across the hills, from lower slopes up near the coast, rarely above 500-600m inland, highest bases toward northeast of Ogwen valley; some broader breaks here just around dawn. Base rising afternoon, high tops stay shrouded, ragged patches lower again in showers.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Largely cloudy, dull, murky toward west in rain; hazy at best. Better visibility eastern hills below cloud, variably poor here too.
How Cold? (at 900m)
6 or 7C at dawn, a slight rise as noon approaches but only to 8C. Wind chill feeling like -3 to -5C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 4th June 2026
Last updated
Tue 2nd Jun 26 at
3:39PM
How windy? (On the summits)
Southwest soon westerly, 30 to 40mph, speeds may vary, stronger gusts occasionally to 45mph.
Effect of the wind on you?
Strenuous walking conditions, frequent buffeting affecting balance on exposed high terrain. Marked wind chill.
How Wet?
Bursts of rain on and off, risk lightning
Showery rain, some heavy bursts increasingly extend eastwards, small risk of thunder. Possibly a drier widow afternoon, some showers and drizzle near evening, but then easing into night.
Cloud on the hills?
Fairly extensive, varied
Covering higher slopes frequently, more persistently in western areas, ragged 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?
Rare brief sun, may break through in west for a time afternoon. Visibility occasionally good below cloud, but reduced in rain, at times poor.
How Cold? (at 900m)
6 or 7C, then tending to drop into night. 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
Tue 2nd Jun 26 at
3:39PM
How windy? (On the summits)
Westerly 25-30mph just at dawn, soon easing towards 20-25mph, shifting southwesterly too, maybe 15mph later.
Effect of the wind on you?
Walking impeded in exposure with notable wind chill early, effects gradually easing, perhaps fairly small in places 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.
Cloud on the hills?
Mostly west, lifting to high terrain
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 Wy Wyddfa may only see short breaks.
Chance of cloud free summits?
Rising to 60%
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.
Planning Outlook
An unsettled spell this week with low pressure over the north Atlantic and west-southwesterly winds dominating. Periods of rain mixed with showery days widely - the most constant rain over western mountains with low cloud often shrouding the hills; bases will typically lift somewhat afternoon. Wind speed will vary, but up to gale-force for periods over the hills this week. Temperatures near average, cooler at times. A brief brighter window Friday afternoon, then unsettled again over the weekend, though detail is currently uncertain. Next week is probably unsettled as well, at least in the north, but higher pressure south of the UK may bring drier and brighter periods to Wales and south Pennines. Scotland remains often blustery and wet, and perhaps chilly, risk briefly freezing on highest tops.