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.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
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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.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 8th July 2026
Last updated
Tue 7th Jul 26 at
4:29PM
Summary for all mountain areas
Damp with blanket low cloud in W-NW Scotland, gusty locally. Highest Scottish tops may emerge above the cloud. Drizzle on western slopes easing, cloud thinning and breaking for central and southwest Scotland, sunnier and warmer overall in east. Very warm to hot sunshine for England & Wales.
Headline for Eryri / Snowdonia National Park
Very warm and sunny. Light-moderate breeze.
How windy? (On the summits)
West soon southwesterly 15mph to sometimes gusts 20mph around higher tops toward north/northwest of Eryri NP.
Effect of the wind on you?
Fairly small.
How Wet?
No rain expected
Cloud on the hills?
Hills clear
Fragments of cloud on low-mid western hill slopes early morning, most hills clear. All dispersing. Odd pockets of sea mist near Llyn peninsula possible.
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Sunshine and thin fair-weather cloud; high UV, beware sunburn. Visibility very good.
How Cold? (at 900m)
14C rising to 17C afternoon. (Inland valleys rising to around 25C, locally approaching 30C eastern mid-Wales).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 9th July 2026
Last updated
Tue 7th Jul 26 at
4:29PM
How windy? (On the summits)
Variable direction 5 to 10mph.
Effect of the wind on you?
Negligible.
How Wet?
No rain expected
Cloud on the hills?
Hills clear
Patchy mist inland valleys at dawn, local coastal fog, but the hills clear, in places overlooking lower fog over the sea.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Generally sunny, thin high cloud. Visibility very good, some low-level haze, or possible fog near the coast.
How Cold? (at 900m)
15C rising to 19C afternoon.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 10th July 2026
Last updated
Tue 7th Jul 26 at
4:29PM
How windy? (On the summits)
Southeasterly or variable, 10-15mph or less.
Effect of the wind on you?
Small.
How Wet?
Most likely dry
Late in the day, chance of a very isolated burst of rain, low risk a thundery downpour.
Cloud on the hills?
Hills clear
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Strong sunshine, some thin high cloud, may build across the sky later. Visibility good especially west, hazier eastwards.
How Cold? (at 900m)
18C at dawn, rising to 22C, very warm and rather humid especially in west. (Most valleys rising toward 30C afternoon)
Freezing Level
Above the summits.
Planning Outlook
Increasingly warm for Scotland, hot for England and Wales this week. Southwesterly winds easing for much of Scotland but remnants of fronts bring further low cloud and drizzle to the west late this week. Locally a chance of thundery downpours in eastern Highlands later Friday, some of which may linger into Saturday but likely fading. A generally fine summertime outlook through the weekend and well into next week as high pressure expands northwards to broadly reside across Britain. Warm but generally pleasant summer temperatures next week. Sunshine and fair-weather cloud, many hills often clear. Easterly breezes for England and Wales.