Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
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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
Tuesday 21st July 2026
Last updated
Mon 20th Jul 26 at
4:00PM
Summary for all mountain areas
Breezy over northern Scottish mountains, tending to strengthen; fairly light wind elsewhere. Most places dry with some patchy cloud on tops largely clearing. Feeling warm in the sun. Northwest Highland coasts hold low cloud and some drizzle much of day. Chance of a late shower over the Pennines.
Headline for Eryri / Snowdonia National Park
Patchy cloud clearing, some sun; light winds until late.
How windy? (On the summits)
Northwesterly 5 to 15mph, increasing a little during day, reaching 20-25mph high tops during evening and into night, soonest over more western summits.
Effect of the wind on you?
Small most of the day, becoming breezier over hills later, feeling blustery toward sunset western tops.
How Wet?
Largely dry
Chance of an odd brief patch of drizzle northern hills in the morning.
Cloud on the hills?
Mostly north in morning, clearing
Patchy cloud banks grazing higher tops mainly in the Snowdon/Yr Wyddfa group for periods in the morning. Lifting to be well broken above tops into afternoon.
Chance of cloud free summits?
50% rising to 90% afternoon
Sunshine and air clarity?
Patchwork of cloud and sun, sunshine best near coast in afternoon. Visibility very good.
How Cold? (at 900m)
12C, small change northwestern areas, rising to 15C toward mid-Wales tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 22nd July 2026
Last updated
Mon 20th Jul 26 at
4:00PM
How windy? (On the summits)
North to northwesterly 15 to 25mph, some gusts 30mph higher tops in northern areas.
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
Drizzle and a little light rain briefly over northern hills 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 may be near top of cloud sheet. Rising to 800-900m then increasingly breaking during day.
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 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
Mon 20th Jul 26 at
4:00PM
How windy? (On the summits)
Northwesterly 10 to 15mph, often less toward mid-Wales.
Effect of the wind on you?
Small.
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)
12C, little change all day Yr Wyddfa / Snowdon group, rising to 16C mid-Wales.
Freezing Level
Above the summits.
Planning Outlook
Largely dry weather continues this week as high pressure stays nearby. Very dry ground and high fire risk, beware of some ongoing fire management with locally restricted access to hills. A prevailing northwesterly wind brings further low cloud and some drizzle onto northwestern Scottish mountains - more widely across the western Highlands later in the week as the flow turns more westerly, with occasional steadier light rain. Patchy cloud over tops elsewhere, best sunshine and warmth in east and south-facing areas. Westerly winds strengthen everywhere into the weekend, bringing some rain and showers to all regions. A changeable and cooler outlook is expected into the last week of July.