Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday'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.
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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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.
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 30th July 2026
Last updated
Wed 29th Jul 26 at
4:29PM
Summary for all mountain areas
Cool, windy, and showery in Scotland. Gales and heavy showers pass west-to-east across the highlands, showers most frequent with lightning risk north. Starting breezy with rain over the Pennines and Wales, this clearing east for sun, a few odd showers northwest England. Mild-to-warm England and Wales.
Headline for Eryri / Snowdonia National Park
Early showers and cloud clear for increasing sun
How windy? (On the summits)
West-northwesterly 10-20mph, strongest wind early with notable gusts over high tops and ridges.
Effect of the wind on you?
Affecting ease of walking with some notable gustiness over high terrain early, but otherwise fairly small effects.
How Wet?
Early showers clear
A band of showery rain around dawn clears east through morning to be largely dry. An odd shower onto western hills may follow, but afternoon is largely dry. Light showers possible by dusk in west.
Cloud on the hills?
Shrouding high terrain early, clear afternoon
Fairly extensive above 700-800m at dawn, lower banks common, around rain. Bases soon rise and break as rain passes east, a few lingering caps over the summits around midday, but then further breaking up afternoon.
Chance of cloud free summits?
Rising to 80%
Sunshine and air clarity?
Fairly cloudy start, then sun breaking through, to become mostly sunny through afternoon. Visibility very good.
How Cold? (at 900m)
7 to 9C, may warm slightly eastern hills. Feeling near 0C in exposure to wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 31st July 2026
Last updated
Wed 29th Jul 26 at
4:29PM
How windy? (On the summits)
West to southwesterly 15 to 25mph, strongest northern tops, at times 30mph; trending stronger with time.
Effect of the wind on you?
Starting to affect comfortable walking at times on higher tops and ridges. Noticeable wind chill.
How Wet?
Brief local showers
One or two showers passing west to east.
Cloud on the hills?
Capping tops in morning, lifting
Patchy cloud soon mostly above 700m early morning, lifting toward higher tops, may come and go for a few hours, but increasingly clearing into afternoon.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Patchwork of cloud and sun; coastal areas sunnier afternoon onward. Visibility very good.
How Cold? (at 900m)
7C rising to 9 or 10C afternoon. Feeling just above freezing in strongest wind over summits.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 1st August 2026
Last updated
Wed 29th Jul 26 at
4:29PM
How windy? (On the summits)
Westerly 10-15mph.
Effect of the wind on you?
Small.
How Wet?
Substantially dry
Occasional showers drift onto western hills from dawn, a few drifting further east (notably afternoon), but plenty of dry windows with most hills staying entirely dry.
Cloud on the hills?
Early cloud largely clears summits
Terrain above 700-800m starts in cloud, lowest bases western Glyder and Snowdon groups locally to 600m. Bases lift, soon clearing hills in east-Wales. Summits largely clear afternoon, though an odd cap may graze Yr Wyddfa/Snowdon.
Chance of cloud free summits?
Rising to 80%
Sunshine and air clarity?
A patchwork of cloud and sun, may push eastward afternoon for frequent sun. Very good visibility.
How Cold? (at 900m)
7 to 9C, mildest inland.
Freezing Level
Above the summits.
Planning Outlook
Cool and showery westerlies into the weekend, windy over high terrain; western hills often capped in cloud. Southern Pennines and Wales likely see only scattered showers and remain warm. Cloud encroaches from the southwest on Sunday, winds turn southerly and warmer air wafts back across England and Wales. A complex area of low pressure is then expected to circulate slowly over Britain early next week, bringing areas of rain and heavy showers, some thundery downpours possible. Winds varying, trending northerly and strengthening, to gales over high summits on Tuesday. A window of improvement from midweek, which may persist into the weekend, but a showery northwesterly persists in Scotland. Beware ongoing fire management restricting access to some mountains.