Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
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.
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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.
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.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 5th September 2026
Last updated
Fri 4th Sep 26 at
4:17PM
Summary for all mountain areas
Brisk and chilly westerly winds in the morning, starting gale-force on high tops in Scotland, but lowering speeds. A little light rain, brief showers mainly western Scotland with varied cloud on tops. Often dry with cloud breaks to tops for eastern Highlands, England and Wales, some sun and hazy high cloud.
Headline for Eryri / Snowdonia National Park
Varied moderate breeze, soon dry, cloud lifting.
How windy? (On the summits)
Westerly 25-30mph at dawn, easing during morning to 15-20mph, turning southwesterly; tending to rise again afternoon onward 25mph at times, some stronger gusts evening into night.
Effect of the wind on you?
Breezy and cool start, lessening to be soon small. Becoming blustery again on some slopes later in day.
How Wet?
Substantially dry
Odd drizzly showers over west coastal hills early in day, soon fading. During afternoon, possibly odd spots from high cloud in west, but more likely dry.
Cloud on the hills?
Mostly clearing
Patchy cloud over some slopes above 700m early morning in western areas, well broken inland. Tending to lift and break above many tops afternoon.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Glimpses of sun, best in east in morning; high cloud thickening to cover the sky. Visibility very good.
How Cold? (at 900m)
7C rising to 10C afternoon, little change or rising a degree or so higher evening/night. Feeling near 0C in wind early morning.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 6th September 2026
Last updated
Fri 4th Sep 26 at
4:17PM
How windy? (On the summits)
South to southwesterly 35 to 50mph, may rise further, very gusty in places, including downslope north of major summits.
Effect of the wind on you?
Frequent buffeting across the hills, walking and balance challenging in places. Feeling cool in exposure despite warm air.
How Wet?
A little rain west
Drizzle and some light rain for periods mainly coastal hills. A band of more frequent rain spreads from the west from dusk into night.
Cloud on the hills?
Mostly west coastal slopes
Varied low cloud, but may cover some slopes near Cardigan Bay but bases higher inland north and eastward with breaks, some hills often clear.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Glimpses of weak sun mainly north/east. Hazy.
How Cold? (at 900m)
12C, humid all day, rising to 14 or 15C, locally warmer northeast. Feeling like 5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 7th September 2026
Last updated
Fri 4th Sep 26 at
4:17PM
How windy? (On the summits)
Southwesterly 30 to 40mph, speeds likely rising during day to 50mph on high tops.
Effect of the wind on you?
Arduous walking with frequent buffeting in exposure on high terrain, may become more difficult. Considerable wind chill.
How Wet?
Early rain, then showery
Rain from overnight may continue through dawn, but breaking up to leave only spotty showers for a time. With time, more frequent showery rain may return.
Cloud on the hills?
Lifting to tops, some breaks
Early varied cloud over the hills, lifting during morning to mostly patches over higher tops, breaks best Carneddau to Bala, more frequent above 700-800m west coast. Lowering patches in showers.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Glimpses of sun mainly northeast areas. A slight haze, particularly western hills, visibility reduced in rain.
How Cold? (at 900m)
7 or 8C, little change all day. Feeling like -2 to -5C in the wind on tops.
Freezing Level
Above the summits.
Planning Outlook
Generally unsettled onward into next week with spells of rain and showers moving in from the Atlantic, accompanied by frequently strong to gale force mountain winds. Temperatures will vary, mildest toward the south, but cooler air moves in from the north at times bringing higher Scottish tops occasionally close to freezing point. Indications favour improving weather patterns during mid-month as high pressure builds from the south.