Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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, 12 to 16C 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, 12 to 16C 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 9th July 2025
Last updated
Tue 8th Jul 25 at
4:30PM
Summary for all mountain areas
Extensive cloud and drizzle near the all western coasts; improving in the afternoon when only a few patches remain, most extensive on the Cuillin where it will also be windy. Cloud base higher well inland with occasional breaks; clearing Peak District and parts of Wales. Feeling cool in Scotland and mild in England and Wales.
Headline for Eryri / Snowdonia National Park
Morning cloud improving. Light winds.
How windy? (On the summits)
Westerly 10 to 20mph, perhaps often lower speeds with variable direction wind.
Effect of the wind on you?
Mostly small.
How Wet?
Possible early drizzle
Patchy drizzle or light rain early in the day, fading out.
Cloud on the hills?
Fairly extensive, but improving
Shrouding many hills in morning, to 400-500m or lower for a time near coasts, mostly above 600m further inland. Gradually thinning during the middle of the day, some patches may remain near coast and in Eryri/Snowdonia NP.
Chance of cloud free summits?
20% rising to 70% afternoon.
Sunshine and air clarity?
Mostly cloudy morning, occasional sun breaking through, more widely later. Misty coastal hills in morning; visibility becoming good below cloud.
How Cold? (at 900m)
12C rising to 15C, humid. Feeling a touch cooler in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 10th July 2025
Last updated
Tue 8th Jul 25 at
4:30PM
How windy? (On the summits)
Southwesterly or variable 10mph or less.
Effect of the wind on you?
Negligible.
How Wet?
No rain expected
Cloud on the hills?
Hills soon clear
Patchy mist or low cloud around hill slopes soon dispersing; high tops likely above early mist. Sea fog may locally linger in far west near Llyn peninsula.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Mostly sunny. Visibility very good.
How Cold? (at 900m)
13C rising to 16C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 11th July 2025
Last updated
Tue 8th Jul 25 at
4:30PM
How windy? (On the summits)
Light winds with variable direction. Risk southerly 15mph near Cardigan Bay.
Effect of the wind on you?
Negligible, small near the west coast.
How Wet?
Very likely dry
Remote risk of isolated late-afternoon thundery showers. Dry otherwise.
Cloud on the hills?
Little or no cloud
Very small chance of patchy cloud on higher ground should there be afternoon showers.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Widespread sunshine; beware sunburn and dehydration. Excellent visibility near west coast; some haze eastern Cymru/Wales.
How Cold? (at 900m)
17 to 19C, warmest in the Berwyn Mountains where it may reach 22C.
Freezing Level
Above the summits.
Planning Outlook
A humid southwesterly wind midweek produces extensive low cloud across west and northwest Scotland with some drizzly rain. Drier with sun and broken cloud in eastern Scotland, improving in southern areas. High pressure expanding over England and Wales brings more sunshine and draws in increasingly very warm air again in the later part of this week; higher temperatures and more sunshine extending into Scotland with time. A fine and very warm weekend in prospect, low risk of thundery showers forming toward the west. Cooler with a greater risk of showers early next week.