Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday'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.
Clear
Excellent or superb visibility, no navigation issues.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
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.
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.
Clear
Excellent or superb visibility, no navigation issues.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 31st July 2026
Last updated
Thu 30th Jul 26 at
2:23PM
Summary for all mountain areas
Westerly winds, tending to strengthen through the day will continue to bring lower temperatures to the mountains (particularly W & NW Scotland), Showers, throughout day W and NW Highlands, but mostly afternoon elsewhere - and few if any S Pennines and Wales.
Headline for Eryri / Snowdonia National Park
Small shower risk.
How windy? (On the summits)
Westerly 10-15mph, a strengthening trend through day, perhaps 20mph over tops in Snowdon range by about mid afternoon.
Effect of the wind on you?
Small.
How Wet?
Rain unlikely - chance of brief shower
Chance of the odd shower,
Cloud on the hills?
All or nearly all clearing by late morning
All or almost all clearing after being fairly widespread on higher slopes particularly western hills until mid or late morning. (There could just be the odd patch coming and going coastal slopes through the day).
Chance of cloud free summits?
Almost certain by late morning
Sunshine and air clarity?
Patchwork of bright sunshine - from west most areas increasingly sunny through afternoon. The air very clear indeed.
How Cold? (at 900m)
7C rising to 9 to 12C afternoon, coldest summits near west coast.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 1st August 2026
Last updated
Thu 30th Jul 26 at
2:23PM
How windy? (On the summits)
Westerly 10-15mph, occasionally 20mph higher tops (mainly Snowdon range).
Effect of the wind on you?
Small.
How Wet?
Substantially or completely dry
Chance of the odd brief shower.
Cloud on the hills?
Early cloud largely clears summits
Terrain above 700-800m starts in cloud, lowest western hills Snowdon range. Bases lift, soon clearing most or all summits by late morning. Then only isolated, if any cloud on higher tops.
Chance of cloud free summits?
Rising to greater than 90%
Sunshine and air clarity?
A patchwork of sun, may push eastward afternoon for frequent sun. Very good visibility.
How Cold? (at 900m)
7 rising to 9 to 14C, , warmest eastern hills.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 2nd August 2026
Last updated
Thu 30th Jul 26 at
2:23PM
How windy? (On the summits)
Varied direction 10mph or less; but later easterly, possibly 15mph toward dusk.
Effect of the wind on you?
Negligible.
How Wet?
Rain unlikely until almost dusk
Increasing threat of rain toward or more likely after dusk.
Cloud on the hills?
Very little at all
Possibly in morning fragments on coastal slopes (not necessarily confined to higher areas).
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sunshine will gradually give way as high cloud thickens. Excellent visibility.
How Cold? (at 900m)
9C rising to 15C.
Freezing Level
Above the summits.
Planning Outlook
Extensively dry with cloud widely confined above the mountains this weekend, although mainly Saturday in Scotland, showers and on western mountains areas of low cloud. Relatively chilly on the west and NW Highlands, but otherwise fairly normal temperatures for early August. Very complicated early next week; areas of rain will drift slowly across central and northern Britain, but the distribution of rain (and associated low cloud) very uncertain. Probably very little rain across Wales. Despite some rain (mainly in Scotland), away from the W & NW Highlands terrain remains exceptionally dry 'tinder dry'.