Includes all summits in the the northern half of Wales from Pumlumon northwards.
Eryri / Snowdonia National Park
Friday 11th July 2025
Last updated
Thu 10th Jul 25 at
4:08PM
Sunny and very warm across most areas with light or negligible wind - beware risk of sunburn and dehydration. Warm temperatures will persist overnight. Temperatures nearer the middle teens on Scotland's west coast in the breeze, some early patchy cloud onto Skye and coastal slopes to the south.
Sunny and very warm, staying warm into night
Light winds with variable direction. Generally southwesterly in the morning, always 10mph or less.
Negligible.
No rain
Little or no cloud
An odd patch of cloud may drift onto low southwest slopes at dawn, soon dissipating for cloud-free summits.
Above 90%
Widespread sunshine; beware sunburn and dehydration. Excellent visibility; some haze eastern Cymru/Wales.
17 to 19C, little change through the day. Warmest in the Berwyn Mountains where it may reach 22C.
Well above the summits. (Remaining warm on high ground overnight.)
Eryri / Snowdonia National Park
Saturday 12th July 2025
Last updated
Thu 10th Jul 25 at
4:08PM
Southeasterly 15mph or less, often light and variable. Rising towards 20mph into nighttime.
Small or negligible.
Very likely dry
Remote risk of isolated thunderstorms in the late afternoon or early evening. Otherwise, dry all day.
Cloud not expected
Almost certain
Widespread strong sunshine; beware sunburn, dehydration and heatstroke. Low level haze, but excellent visibility on high ground.
20C at dawn, rising a degree or two. Remaining warm overnight.
Well above the summits. (Valley temperatures approaching 28 to 30C in the afternoon, hottest east Wales.)
Eryri / Snowdonia National Park
Sunday 13th July 2025
Last updated
Thu 10th Jul 25 at
4:08PM
Southeasterly with some variability, 15-20mph. Breezes occasionally reaching 25mph, notably early in the day.
Fairly small, occasional uncomfortable breezes; some buffeting gusts early.
Substantially dry
Few local spots of light rain later in the day, otherwise dry.
Any cloud unlikely
Above 90%
A widely sunny morning, patchy cloud building and increasingly blocking sun. Excellent visibility.
17 or 18C, only a slight warming if any.
Above the summits
Very warm or hot conditions this weekend in the mountains and the valleys, with extreme risk of wildfire in Scotland; beware dehydration and sunburn. Light winds and very little cloud. Low pressure returns late Sunday into Monday bringing rain to most, risk heavy or thunderstorms north England and Scotland. Temperatures will cool towards average and often raining for the first half of the week. Becoming more mixed from mid-week as pressure goes slack and Atlantic fronts make only weak pushes from the west. Patchy rain and cloud will come and go with the best opportunities for sun in north and western areas.