Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Cool to mild
Air temperature 8 to 12C 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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Cool to mild
Air temperature 8 to 12C 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
Sunday 15th June 2025
Last updated
Sun 15th Jun 25 at
7:00AM
Summary for all mountain areas
Westerly breezes bring extensive cloud to western hills and mountains, with intermittent drizzly rain or light showers, most persistent western Scotland. Further inland and eastwards, the cloud bases higher and more often dry through the day.
Headline for Eryri / Snowdonia National Park
Breezy, rather cool. Low cloud, drizzly rain develops.
How windy? (On the summits)
Westerly, 20 to 25mph.
Effect of the wind on you?
Fairly small, but feeling blustery where exposed over tops and some ridges.
How Wet?
Drizzly rain mainly afternoon
Brief early showers clear east. Then occasional drizzly rain western mountains mainly during afternoon, may become often damp for a few hours in west, but total rainfall small.
Cloud on the hills?
Briefly breaking to summits; lowering for a time afternoon
Varied in morning, low cloud lifting to give brief breaks to tops for a few hours. Tending to lower back across the mountains in afternoon where drizzle develops, lowest base near west coast. May lift again into evening.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Patches of sun mainly well inland. Very good visibility where out of cloud, but sometimes misty near the coast.
How Cold? (at 900m)
9C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 16th June 2025
Last updated
Sun 15th Jun 25 at
7:00AM
How windy? (On the summits)
West then southwesterly, 15 or 20mph, tending to increase evening into night to 25-30mph.
Effect of the wind on you?
Small most of day, may start to feel more blustery toward dusk.
How Wet?
Rain unlikely
Rare pockets of fine drizzle slopes close to southwest facing coasts.
Cloud on the hills?
Persistent near some coasts; cloud base rising to or above higher tops inland
Cader Idris north to areas between Lleyn peninsula and Snowdon: Hills foggy much of day, cloud base typically 450m late morning, 600m at times. Elsewhere: cloud base rising to 800 to 1000m.
Chance of cloud free summits?
60% afternoon
Sunshine and air clarity?
Patchwork of sunshine and very good visibility - but often dull and sometimes misty toward the coast near Lleyn peninsula.
How Cold? (at 900m)
11 to 14C warmest east Wales afternoon.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 17th June 2025
Last updated
Sun 15th Jun 25 at
7:00AM
How windy? (On the summits)
West to southwesterly 20 to 25mph, may drop less during afternoon.
Effect of the wind on you?
Fairly small, but feeling breezy on exposed tops, may start to affect balance on ridges; becoming less with time.
How Wet?
Drizzly rain for a time
Patchy drizzle on western hills becoming more persistent for a time as a weakening front comes in from the north, fading later.
Cloud on the hills?
Fairly extensive, lowest western hills
Risk covering higher areas most of the day, lowest cloud bases toward west coast when rain occurs, from 500-600m upward or brief lower patches. Higher bases Carneddau and Berwyn groups.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Fairly cloudy and some haze west. Glimpses of sun, visibility good further inland and east where below cloud.
How Cold? (at 900m)
10C, quite humid.
Freezing Level
Above the summits
Planning Outlook
Little rainfall most of the week ahead and increasingly warm, although western Scotland cooler with occasional rain as weakening fronts affect particularly the NW Highlands early week. By midweek, fine for a few days everywhere. Lowering pressure by next weekend brings a risk of showery rain returning with cooler temperatures, although detail very uncertain by this stage.