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.
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
Friday 29th May 2026
Last updated
Thu 28th May 26 at
3:54PM
Summary for all mountain areas
Very windy Scottish Highlands, afternoon gales, strongest north. Extensive low cloud and rain, most west, some breaks east but little sun. Morning cloud over England and Wales, clearing Wales and S Pennines for afternoon sun. Cloud slow to clear west slopes of Lakeland and N Pennines, spotty rain and blustery here.
Headline for Eryri / Snowdonia National Park
Spotty drizzle and breezy early, improving to sunshine
How windy? (On the summits)
West-southwesterly 20 to 25mph, gusting 30mph over tops and passes in the morning. An easing trend afternoon towards 15-20mph.
Effect of the wind on you?
Breezy over higher exposed terrain, noticeably affecting balance on ridges in the morning and feeling rather cool. An easing trend, but staying gusty over tops.
How Wet?
Rain rare if any
Brief drizzly showers at dawn over highest tops and west coastal areas, these soon fading for a dry day.
Cloud on the hills?
Slow to clear west coast hills, later only summit caps
Banks of cloud over hills, may come and go toward coast above 600-800m. Higher bases north and eastward, breaks above the summits. Tending to break up with time, a few caps at times returning 900m and above.
Chance of cloud free summits?
50% rising to 80%
Sunshine and air clarity?
A patchwork of cloud and sun, weakened by high cloud, but most cloud moving away for a sunny afternoon. Very good visibility.
How Cold? (at 900m)
8 or 9C, locally rising to 10C. Wind chill feeling near 0C on high tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 30th May 2026
Last updated
Thu 28th May 26 at
3:54PM
How windy? (On the summits)
Southwesterly 15 to 25mph, gradually strengthening, up to 40mph gusts over high tops later.
Effect of the wind on you?
Increasingly affecting ease of walking, becoming strenuous on high terrain. Marked wind chill on exposed tops.
How Wet?
Some rain develops from west
Largely dry morning or longer, but increasing risk with time into afternoon of patchy rain moving in from west, possibly becoming more persistent late in west.
Cloud on the hills?
Mostly little, lowering over tops later
Some patchy cloud banks mostly hills near west coasts in morning, but many hills clear. As rain develops later, cloud lowering over summits from west, banks lowering towards 700m late in the day.
Chance of cloud free summits?
80% dropping to 50% later
Sunshine and air clarity?
Occasional sun then high cloud builds; cloudier and dull later in day. Visibility very good, reducing later in rain.
How Cold? (at 900m)
9 or 10C, coolest Yr Wyddfa and westward; may reach 11C Carneddau. Later feeling near 0C on tops in wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 31st May 2026
Last updated
Thu 28th May 26 at
3:54PM
How windy? (On the summits)
Westerly 20-30mph.
Effect of the wind on you?
Beginning to affect ease of walking, more strenuous conditions at times over high summits with a chilly feeling.
How Wet?
Light showers
Scattered showers drifting from the west, mostly light in nature, a lingering fine drizzle on high west slopes in the morning. An easing trend afternoon.
Cloud on the hills?
Lifting to just caps on high tops.
Fairly extensive above 600m early, to 300m west slopes Yr Wyddfa and southward; nearer 700-800m Carneddau. Lifting and breaking, many hills clear by early afternoon, but a lingering banks of cloud over Snowdon and high west slopes.
Chance of cloud free summits?
Rising to 70%
Sunshine and air clarity?
Patchy sunshine. Very good visibility but a building haze in the distance over the sea.
How Cold? (at 900m)
8 or 9C. Feeling around freezing in strongest wind.
Freezing Level
Above the summits.
Planning Outlook
Nearer average temperatures for all into the weekend onward as changeable southwesterlies prevail. England and Wales remain fairly sunny through Saturday, only beginning to deteriorate afternoon. Sunday will see showers for all, most in the west, and more frequent with heavy bursts in Scotland. A generally unsettled theme is expected during the first ten days of June with lower pressure dominating. Frontal systems come in from the Atlantic - rain, drizzle and low cloud most common on western coastal mountains, but showery days are likely more widely at times, possibly rain more widely further south later in week. Wind speeds will vary, but reaching gale force on mountains for periods. Occasional cooler spells when the wind turns northwesterly.