Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
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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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.
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 25th April 2026
Last updated
Fri 24th Apr 26 at
4:05PM
Summary for all mountain areas
Low fog in north and east Scotland in the morning, lifting and breaking, may linger in eastern areas; chilly here too for several hours. Often sunny England and Wales with warm temperatures; some high cloud around, but beware sunburn risk. Later cooling in southeast Scotland and N Pennines. Negligible wind.
Headline for Eryri / Snowdonia National Park
Warm sunshine, some high cloud; cool valleys early
How windy? (On the summits)
Variable less than 10mph.
Effect of the wind on you?
Negligible.
How Wet?
No rain expected
Cloud on the hills?
None expected
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Extensive sunshine, some high cloud around, occasionally thickening and weakening the sun. Visibility excellent, slight low-level haze early.
How Cold? (at 900m)
9 or 10C, may rise a degree.
Freezing Level
Above the summits. Patchy frost at dawn sheltered valleys of east Wales.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 26th April 2026
Last updated
Fri 24th Apr 26 at
4:05PM
How windy? (On the summits)
South-southwesterly 10-15mph, up to 20mph early in the day. Trending variable in direction and towards lower speeds.
Effect of the wind on you?
Mostly small, through a notable breeze in the morning, some gustiness too.
How Wet?
Risk scattered showers, likely dry
Local showers here and there, the showers generally light and fleeting; a small risk of a heavier burst east Wales, but most hills stay dry.
Cloud on the hills?
Likely cloud-free
Patchy mist in east-Wales valleys, this soon dissipating after sunrise for cloud-free hills. Snowdonia may be cloud-free dawn to dusk.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Often sunny, though weakened by high cloud, which may thicken. Very good visibility.
How Cold? (at 900m)
9 or 10C. (Starting several degrees cooler in the valleys, rising to 18 or 19C.)
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 27th April 2026
Last updated
Fri 24th Apr 26 at
4:05PM
How windy? (On the summits)
Northerly 10-15mph; may shift northeasterly afternoon, notable gusts to 20mph.
Effect of the wind on you?
Fairly small, though some inconvenient gusts over high terrain at times.
How Wet?
Chance scattered showers
Scattered showers here and there, greatest risk on northern slopes. Risk of heavier showers east Wales.
Cloud on the hills?
Banks lingering on high northern slopes
Banks of cloud at various elevations from dawn, lifting to mostly 800-900m and up through morning and becoming well-broken towards mid-Wales. Northern slopes and high tops of Snowdonia more often capped.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Often sunny mid-Wales, more often cloudy north Snowdonia, then a patchwork of sun afternoon. Very good visibility, though an early haze.
How Cold? (at 900m)
7 or 8C.
Freezing Level
Above the summits.
Planning Outlook
High pressure remains dominant this weekend and into next week: regularly sunny and pleasantly warm days; summit temperatures often at or above 10C, many valleys will warm up toward 20C afternoon. Risk of sunburn in strong sunshine and very dry springtime ground conditions with high risk of wildfire. Risk of showers Sunday and Monday, which could be heavy Monday, some risk of thunderstorms developing in England, though confidence is low. The middle of next week remains settled with sunshine, patchy dawn mist that soon fades. An easterly wind establishes in Wales from mid-week, then a rising risk of wind pushing northward with rain following. Long-term detail is very uncertain, but a trend towards cooler, more unsettled weather is indicated in early May.