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 5th June 2026
Last updated
Thu 4th Jun 26 at
3:49PM
Summary for all mountain areas
Blustery start, gale-force gusts in N England and Scotland; easing. Chilly with showers in W Scotland, showers more widely over the highlands afternoon with sunny interludes. Early showers in England and Wales ease by afternoon, only well-scattered showers remain over Wales and S Pennines, plenty sun breaks.
Headline for Eryri / Snowdonia National Park
Patchy sunshine, rare rain until late; breezy periods on tops
How windy? (On the summits)
Westerly 25-30mph at dawn, soon shifting southwesterly and easing to 15-25mph, lightest winds on east mountains. Shifting southerly later, beginning to deteriorate western hills into night and more widely overnight.
Effect of the wind on you?
Ease of walking impacted at dawn, perhaps strenuous in exposed places, but easing to fairly small effects much of the day until deteriorating as night approaches.
How Wet?
Well-scattered patchy rain, late afternoon showers
Spots of light rain here and there, some drizzle in cloud on high tops just at dawn; plenty of dry windows too, little precipitation towards Carneddau. Some risk of later afternoon showers drifting northward through mid-Wales into Eryri NP.
Cloud on the hills?
Mostly west, lifting to high terrain with breaks
Fairly extensive above 600m in the west in the morning, bases towards 700-800m in the east; lifting through morning, breaking up somewhat, many hills clearing, though Yr Wyddfa may only see short breaks until mid-afternoon.
Chance of cloud free summits?
Rising to 70% by later afternoon
Sunshine and air clarity?
A patchwork of sunshine, high cloud thickens through afternoon. Good visibility, some light haze around.
How Cold? (at 900m)
3C at dawn, rising to 7C or a degree mildest towards Carneddau and eastward. Only small drop into night. Feeling like -5C in strongest early wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 6th June 2026
Last updated
Thu 4th Jun 26 at
3:49PM
How windy? (On the summits)
S-SE'ly, then SW'ly, uncertainty of extent of stronger winds - likely in range 30 to 50mph, but also lighter for a few hours.
Effect of the wind on you?
Beware of changing conditions - risk arduous or difficult at times, but also a periods of lesser effects.
How Wet?
Risk periods of heavy rain
Patchy rain likely through much of the day, perhaps an extended heavy fall in the early hours. A few dry windows are probable, but always with a risk of returning rain, mostly from the southwest.
Cloud on the hills?
Fairly extensive
Shrouding many hills much of day, especially more western areas, from low-mid slopes upward especially in rain, highest bases toward Carneddau if drier. A few fleeting breaks with higher bases here and there, maybe more often late.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, mostly dull, poor visibility in rain, locally better if dry northern areas for a time; may start to improve later in west.
How Cold? (at 900m)
5C rising to 8 or 9C afternoon, notably lowering into evening-night. Feeling below freezing in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 7th June 2026
Last updated
Thu 4th Jun 26 at
3:49PM
How windy? (On the summits)
Southwesterly 30-40mph, strong gusts over tops to 45mph, possibly stronger.
Effect of the wind on you?
Walking strenuous, including lower slopes early, and often arduous over tops with considerable wind chill.
How Wet?
Likely little rain
Some spotty rain drifting onto western slopes from time to time, perhaps a fine drizzle on high terrain in the early hours; most slopes may well be substantially dry most of the day.
Cloud on the hills?
Lifting to high terrain
May be fairly extensive from middle slopes up in the morning, to the lower slopes west of high terrain. Lifting, likely largely above 800m, perhaps clearing summits of Berwyn group and Carneddau, but highest summits will struggle to clear.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Weak sunshine through high cloud, increasingly patchy with time. Good visibility though a haze over the sea.
How Cold? (at 900m)
7 or 8C, may rise to 9C Carneddau. Feeling near or below freezing in strongest wind.
Freezing Level
Above the summits.
Planning Outlook
Unsettled over the weekend as southwesterly flow draws several areas of rain across the country, best of dry slopes to the northeast, and perhaps a drier Sunday for England and Wales through blustery, some uncertainty in detail. Generally unsettled next week too: showers affect most hills Monday and Tuesday, lowest cloud and most persistent rain along western slopes, but with some breaks as well with sunshine. Timing of most unsettled weather remains uncertain, but some risk of a deeper area of lower pressure from Wednesday or later brining widespread strong winds, probably gales over many summits, with prolonged heavy rain. Temperatures probably trending milder again into the weekend, pressure may begin to rise in the south, but this uncertain as well.