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.
Dry and sunny
Extensive strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Click an icon for more information or click here for a key to all icons.
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 30th April 2025
Last updated
Tue 29th Apr 25 at
4:00PM
Summary for all mountain areas
Fine and warm, or very warm Wales and Pennines. Strong sunshine, some thin high cloud; beware sunburn and dehydration. Toward northwest Scotland, strengthening southwesterly winds, more cloud at times, one or two brief showers. Into night, some rain moves into Scotland from the west.
Headline for Eryri / Snowdonia National Park
Sunny and very warm, light winds.
How windy? (On the summits)
Variable or southerly, 15mph or less.
Effect of the wind on you?
Negligible
How Wet?
No rain
Cloud on the hills?
None expected
Chance of cloud free summits?
100%
Sunshine and air clarity?
Bright sunshine, early thin high cloud clearing. Visibility very good, but may start hazy.
How Cold? (at 900m)
12C rising to 14C, local 16C northern areas afternoon. Some valleys inland and toward north of high ground reaching 25C afternoon.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 1st May 2025
Last updated
Tue 29th Apr 25 at
4:00PM
How windy? (On the summits)
Southerly 10mph or less, at times little wind. Possible sudden gusts during or just before rain locally.
Effect of the wind on you?
Mostly small
How Wet?
Risk local thunderstorms later
Uncertainty: As high cloud builds, odd spots of rain, localised bursts of rain possible later in afternoon, greatest risk in mid-Wales; isolated thundery downpours into evening and night.
Cloud on the hills?
Hills clear; forming if rain develops later
Local patches forming to some lower slopes only where rain occurs later in day.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Extensive sunshine in the morning. Patchy cloud building after noon, high cloud may later cover the sky. Good visibility, but some haze.
How Cold? (at 900m)
13C rising to 16C.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 2nd May 2025
Last updated
Tue 29th Apr 25 at
4:00PM
How windy? (On the summits)
Mostly northerly, 15mph, occasional 20-25mph mainly northern areas.
Effect of the wind on you?
Fairly small, but feeling chilly in exposure on high tops.
How Wet?
Possible early rain
Risk of patchy rain from overnight into early morning, most likely toward mid-Wales. Fading out to leave a dry day.
Cloud on the hills?
Lifting and clearing
Possible varied cloud banks over hills from dawn into early morning, lifting toward then above most tops by middle of day, may largely disperse.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Some sun breaking through as high cloud thins and disperses. Visibility becoming excellent, but may be hazy for several hours.
How Cold? (at 900m)
6 to 9C, coolest north; only small rise. Wind chill feeling like -2C around northern high tops.
Freezing Level
Above the summits
Planning Outlook
Dropping colder across the Highlands by Thursday, near to freezing on higher summits; strong westerly winds in the north giving considerable chill factor and bringing a few showers. Warmer further south - risk of local thundery rain for Wales later Thursday. High pressure centred toward the northwest maintains plenty of dry weather over the Bank Holiday weekend with broken cloud and sun; brief local showers possible. Cool and breezy toward north and eastern mountains, lighter winds and warmer toward southwest Highlands, Cumbria and west Wales. Further into next week, risk spells of chilly and strong west-northwesterly winds particularly for the Highlands, some showery days.