Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
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.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Click an icon for more information or click here for a key to all icons.
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
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.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 23rd July 2026
Last updated
Wed 22nd Jul 26 at
4:00PM
Summary for all mountain areas
Low cloud and drizzle across the northern parts of the Highlands in the morning, cloud tending to lift for central-southern Highlands, but northwestern areas stay damp, more persistent rain later and winds also strengthening. Cloudy skies for England and Wales, most hills clearing in the morning, low risk of a shower.
Headline for Eryri / Snowdonia National Park
Light-moderate breeze. Largely dry, cloud lifts above hills.
How windy? (On the summits)
Northwesterly 10 to 15mph, often less toward mid-Wales. Tending to increase into evening-night to 20-25mph.
Effect of the wind on you?
Small during day.
How Wet?
Generally dry
Odd pockets of fine drizzle some northern slopes around early cloud. Small chance a brief light shower mainly inland afternoon.
Cloud on the hills?
Patchy cloud lifting and breaking
Local mist in valleys, patchy cloud banks from dawn, soon mostly above 700m. Cloud base rising toward then above most higher summits by midday, odd patches above 900-1000m.
Chance of cloud free summits?
60% rising to 80%
Sunshine and air clarity?
Patchwork of cloud and sun, cloudier start toward north coasts, then sun breaking through best toward all coasts in the afternoon. Visibility increasingly very good.
How Cold? (at 900m)
10 to 12C, only slight rise Yr Wyddfa / Snowdon group, reaching 16C mid-Wales.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 24th July 2026
Last updated
Wed 22nd Jul 26 at
4:00PM
How windy? (On the summits)
West or northwesterly 20 to 25mph, at times 30mph higher northern tops, speeds tending to rise slightly later in day.
Effect of the wind on you?
Breezy over the hills, starting to affect ease of walking in some exposed spots. Noticeable wind chill.
How Wet?
Rain unlikely
Chance of a brief patch of drizzle mainly hills around Llanberis.
Cloud on the hills?
Sometimes capping high tops
Patches of cloud drifting over hills toward west and northern coasts, mostly above 800m, breaking above tops for periods. More often clear toward eastern tops.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Cloud and intermittent sun, best in eastern mid-Wales. Visibility very good.
How Cold? (at 900m)
9C rising to 11C. Feeling like 2 to 4C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 25th July 2026
Last updated
Wed 22nd Jul 26 at
4:00PM
How windy? (On the summits)
Westerly 25 to 35mph, at times 40mph with possible stronger gusts over higher northern mountains.
Effect of the wind on you?
Strenuous walking and marked chill over the hills, buffeting gusts making balance challenging on exposed ridges.
How Wet?
Rain and drizzle
Rain developing from the north early morning, a mix of drizzle and periods of persistent rain over western hills during daytime, staying generally damp; patchier small amounts of drizzly rain further east.
Cloud on the hills?
Lowering to become extensive
Patchy cloud banks at first northwest areas, hills toward mid-Wales may start clear, but cloud likely to lower widely as rain develops, blanketing hills to lower elevations in west, 500-700m inland/east.
Chance of cloud free summits?
50% dropping to 10%
Sunshine and air clarity?
Initially high cloud and fairly bright, good visibility if dry, but deteriorating to cloudy dull conditions, misty poor visibility west.
How Cold? (at 900m)
11C, up to 13C eastern tops afternoon. Feeling near to freezing directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
Westerly winds reaching gale-force over Scottish tops on Friday; low cloud across western Scotland, drizzle and steadier light rain, turning heavier later in the day. A swathe of persistent rain and strong winds moving southwards across Britain into Saturday, leaving a legacy of showers for Scotland, winds tending to lessen. Further areas of showers into Sunday. A changeable west to southwesterly pattern into next week and likely into early August, bringing spells of rain and showers; varying wind speeds, strengthening at times to gales on high tops. Often cooler for Scotland, a mix of cooler and warmer days for England & Wales.