Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday'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.
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.
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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.
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
Wednesday 22nd July 2026
Last updated
Tue 21st Jul 26 at
4:08PM
Summary for all mountain areas
Dull and damp for northern Scotland much of the day, low cloud blanketing the hills, fresh northwesterly winds, feeling cool. Drier and better cloud breaks southward across the Highlands. Some cloud on hills in northern England and Wales tending to lift and break, some warm sunshine.
Headline for Eryri / Snowdonia National Park
Early damp low cloud, improving. Moderate breeze.
How windy? (On the summits)
Northerly 15 to 25mph, some gusts 30mph higher tops in northern areas in the morning, shifting northeasterly afternoon.
Effect of the wind on you?
Feeling breezy and quite cool over higher terrain, starting to affect ease of walking and balance on exposed high ridges.
How Wet?
Damp start toward north
Drizzly patches briefly over northern slopes in the morning, largely fading into middle of day, but an odd light shower possible inland in the afternoon.
Cloud on the hills?
Early low cloud lifting and clearing
Cloud banks early morning most widely over northern hills, possibly to 500-600m for a time, 700m and more broken further south; highest tops near or above top of cloud sheet. Rising to 800-900m then increasingly breaking up into middle of day. Local patches may linger for longer Carneddau.
Chance of cloud free summits?
50% rising to 90%
Sunshine and air clarity?
Fairly cloudy, some sun breaking through, best mid-Wales. Visibility reduced around early dampness, then very good below cloud.
How Cold? (at 900m)
10C in cloud early in day, rising to 13C. Feeling like 3 to 5C directly in the wind on high tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 23rd July 2026
Last updated
Tue 21st Jul 26 at
4:08PM
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
Small chance a brief light shower mainly 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, best toward the coast in the afternoon. Visibility very good.
How Cold? (at 900m)
10 to 12C, little change all day Yr Wyddfa / Snowdon group, rising to 16C mid-Wales.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 24th July 2026
Last updated
Tue 21st Jul 26 at
4:08PM
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.
Planning Outlook
Westerly winds strengthen widely later this week, reaching gale-force over Scottish tops on Friday; low cloud across western Scotland, drizzle and steadier light rain, turning heavier later Friday. 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 westerly 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.