Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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 4th August 2026
Last updated
Mon 3rd Aug 26 at
4:30PM
Summary for all mountain areas
Extensive rain and low cloud across Scotland, becoming thundery downpours into the afternoon from the south into the Highlands. For England & Wales, rain and low cloud most persistent in the morning, heavy showery bursts in middle of day tending to clear eastward afternoon. Strong and gusty winds widely.
Headline for Eryri / Snowdonia National Park
Low cloud, thundery bursts of rain; improving. Breezy.
How windy? (On the summits)
South-southwesterly 25 to 30mph, gusty around showers, and sustained speeds generally rising to 30-35mph in afternoon on higher western mountains.
Effect of the wind on you?
Blustery over the mountains, affecting comfortable walking and balance on exposed tops and ridges. Feeling cool in the wind despite mild air.
How Wet?
Showers, some heavy bursts, risk thunder, mostly clearing afternoon.
Pulses of rain and heavy showers, a risk of thunder and lightning through morning and middle of day, but tending to clear northeastward to just well scattered brief showers afternoon onward.
Cloud on the hills?
Low cloud rising, some breaks later
In morning, expect blanket of fog across higher areas, ragged patches to some lower slopes. An improvement during the day as cloud base lifts toward 700m, and some breaks higher up later in day.
Chance of cloud free summits?
20% rising to 60% afternoon
Sunshine and air clarity?
Occasional sunshine, developing more widely from west during afternoon. Hazy start, visibility poor in rain, improving to become increasingly very good.
How Cold? (at 900m)
13C, up to 16C out of cloud eastern tops. Feeling like 2 to 5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 5th August 2026
Last updated
Mon 3rd Aug 26 at
4:30PM
How windy? (On the summits)
West-southwesterly, often 30 to 40mph, risk up to 50mph northern tops mostly in the afternoon.
Effect of the wind on you?
Often strenuous walking on high terrain, making balance challenging on ridges. Marked wind chill.
How Wet?
Showery rain
Rain most common on western hills, amounts fairly small, but risk locally frequent with odd heavier showers. Scattered showers passing eastwards.
Cloud on the hills?
Most persistent west
Covering many higher slopes much of the day above 600-800m, lowest and most persistent west coasts and during rain. Some breaks forming where dry in east.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief sun breaking through mainly east. A general slight haze, reduced further in rain.
How Cold? (at 900m)
8 or 9C, little change all day. Feeling near or below freezing in the stronger wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 6th August 2026
Last updated
Mon 3rd Aug 26 at
4:30PM
How windy? (On the summits)
Northwest then westerly 25mph, up to 30-35mph for a few hours from dawn, tending to ease toward 20mph afternoon.
Effect of the wind on you?
Blustery morning, affecting ease of walking and balance on tops and ridges, lessening. Feeling rather chilly on tops.
How Wet?
Early showers fade
Showers from dawn into early morning, tending to fade to be often dry, rare light showers into middle of day onward. A little light rain may return from dusk.
Cloud on the hills?
Lifting and breaking above tops
Cloud banks above 700-800m in the morning, most common toward west. Lifting to higher tops then largely clearing the hills, odd patches on highest summits.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Patchwork of cloud and sun. Visibility very good.
How Cold? (at 900m)
7C rising to 9C afternoon. Feeling close to freezing if exposed to wind on tops.
Freezing Level
Above the summits.
Planning Outlook
Low pressure over the country during midweek brings strong winds, rain and thundery showers. Trending toward westerlies later in the week and into weekend, by then most rain and low cloud in western Scotland, but showery rain elsewhere at times, accompanied by periods of strong to gale force mountain winds at times. Generally fresh temperatures widely, often in mid-single figures over Scottish high tops. Despite falls of rain, beware of ongoing fire management restricting access to hills locally.