Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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
Sunday 3rd May 2026
Last updated
Sat 2nd May 26 at
4:19PM
Summary for all mountain areas
Fog and patchy drizzle in Scotland, cloud most persistent east highlands. Rain over southeast Scotland and English mountains most or all day, extensive low fog over the Pennines; becoming wet underfoot with fast-flowing streams. Patchy rain and fog in Wales too, a risk of heavy afternoon showers.
Headline for Eryri / Snowdonia National Park
Patchy rain and drizzle, variable fog; brief clear periods
How windy? (On the summits)
Low confidence in forecast due to proximity of low centre: generally northerly 10-15mph, but direction may substantially vary in the early hours.
Effect of the wind on you?
Fairly small.
How Wet?
Patchy rain and drizzle most or all day
A band of rain from overnight breaks into patchy rain and drizzle soon after dawn, which will linger most of the day. A few drier moments are possible, but also with a risk of heavier bursts of rain returning later. Quite wet underfoot with fast-flowing streams.
Cloud on the hills?
Blanket of fog although some improvement through day
Fog enveloping the hills, sometimes from lower slopes, particularly on hills accessible from and northeast of the A5. As rain clears, so cloud base will rise, perhaps to 800 to 1000m, albeit patches reforming lower down near showers.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Overcast, murky, and poor visibility in the morning in fog and rain. An improving trend as cloud tends to lift, though glimpses of sun will be brief, if any.
How Cold? (at 900m)
6 or 7C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 4th May 2026
Last updated
Sat 2nd May 26 at
4:19PM
How windy? (On the summits)
North-northeasterly 5-15mph, trending towards the higher end of the range with time.
Effect of the wind on you?
Small, but trending breezy on the high summits later.
How Wet?
Very likely dry: chance brief shower
Well scattered showers may develop east Wales afternoon.
Cloud on the hills?
Clearing most summits, but lingering on high north slopes
After dawn, cloud likely to be widespread on higher areas, particularly west Wales. Cloud base likely to rise through morning, clearing many summits south of Snowdon and Carneddau; banks linger on northern slopes above 700-800m.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Patches of sunshine, perhaps extensive sun spreading gradually inland afternoon. Visibility very good.
How Cold? (at 900m)
4C, rising by mid afternoon to 6 to 8C, warmest mid-Wales.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 5th May 2026
Last updated
Sat 2nd May 26 at
4:19PM
How windy? (On the summits)
Northerly 10-15mph, sometimes less.
Effect of the wind on you?
Mostly small.
How Wet?
Substantially dry
A chance of sparse light showers, though most hills stay dry.
Cloud on the hills?
Mostly just northern hills
Low cloud to 500-600m in north Snowdonia/Carneddau in the early morning, patches on higher terrain further south. Much of the cloud lifts and dissipates for clear hills, but patches continue to drift onto high northern slopes through the day.
Chance of cloud free summits?
80%, 60% northern slopes
Sunshine and air clarity?
Sunshine breaking out through morning for at least several hours, then a patchwork afternoon with fair weather cloud. Very good visibility.
How Cold? (at 900m)
3 or 4C.
Freezing Level
Above the summits.
Planning Outlook
Chilly temperatures on the mountains most or all week, particularly across the Scottish Highlands where fresh snow in some areas and freezing level sometimes below 750m; some overnight frosts developing in the glens and corries, though always thawing soon after sunrise. Mixed weather with showers drifting around the country, though total rainfall will be fairly small. Wind often light as well, though variable afternoon breezes will form, particularly around showers where gusts may be suddenly strong. Local low fog in the mornings, typically lifting towards or above many summits; a mix of high cloud and sun for most. Detail uncertain into next weekend, but lowering pressure brings an increased risk of wind and rain.