Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Drizzle
Light rain or drizzle, total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Very murky conditions, the mountains shrouded in fog, making navigation challenging. Map and compass essential.
Mild
Air temperature above freezing to highest summits. May feel pleasantly warm on lower ground, but take appropriate layers. Feeling chilly if exposed to wind.
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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Drizzle
Light rain or drizzle, total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Very murky conditions, the mountains shrouded in fog, making navigation challenging. Map and compass essential.
Mild
Air temperature above freezing to highest summits. May feel pleasantly warm on lower ground, but take appropriate layers. Feeling chilly if exposed to wind.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 4th May 2024
Last updated
Fri 3rd May 24 at
4:45PM
Summary for all mountain areas
A broad and very slack area of low pressure will edge north bringing extensive low cloud and areas of drizzle, with again bursts of heavy, perhaps locally thundery rain, developing into Scotland. Best breaks in cloud and sun in the northwest Highlands, and clearer, brighter conditions developing for southern Wales.
Headline for Eryri / Snowdonia National Park
Morning low cloud and drizzle, tending to slowly clear from south in the afternoon.
How windy? (On the summits)
Southwesterly, likely to vary, often 15 to 25mph, risk gusty 30mph at times, mainly Yr Wyddfa/Snowdon group.
Effect of the wind on you?
Varied over the mountains, risk blustery for periods over exposed higher terrain.
How Wet?
Morning drizzle and rain clearing
Drizzly at first in hill fog, plus bursts of rain for a time, but likely to clear away northwestwards slowly during the afternoon. Then generally dry.
Cloud on the hills?
Low cloud lifting and mostly clearing
Varied banks of cloud over the hills at different heights from dawn, extensive for a few hours, but likely to lift and break up during the afternoon leaving just rare patches around some slopes by the end of the afternoon.
Chance of cloud free summits?
20% rising to 80% by late afternoon.
Sunshine and air clarity?
Overcast, then some sun coming out through high cloud from mid afternoon. Murky in morning, but visibility becoming generally good in afternoon, possible slight haze persisting.
How Cold? (at 900m)
5 to 7C.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 5th May 2024
Last updated
Fri 3rd May 24 at
4:45PM
How windy? (On the summits)
South to southeasterly 10 to 15mph, may drop out at times.
Effect of the wind on you?
Small
How Wet?
Increasing risk of some showers
After a mostly dry start to the day, the cloud will bubble up with the risk of showers moving up from the south.
Cloud on the hills?
Patches coming and going over tops
Generally good breaks through the day when the hills are clear. However some patches will form at times across higher slopes, especially in and around showers.
Chance of cloud free summits?
60%
Sunshine and air clarity?
A mix of cloud and patchy sun. Visibility good or at times very good.
How Cold? (at 900m)
6C
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 6th May 2024
Last updated
Fri 3rd May 24 at
4:45PM
How windy? (On the summits)
Northerly 10 to 20mph, risk gusting higher near any heavy showers.
Effect of the wind on you?
Mostly small, but be prepared for some sudden gusts near any heavy showers.
How Wet?
Showers breaking out, some heavy.
After a mostly dry morning, clouds will bubble up towards and into the afternoon with the risk of scattered showers, some heavy. Mostly dry near the coast.
Cloud on the hills?
Banks of low cloud, lifting and breaking
Banks of low cloud at varying heights from dawn, some hills perhaps clear. Bases will tend to rise and break up with clearances, but reforming in showers.
Chance of cloud free summits?
Lifting to 60%
Sunshine and air clarity?
Cloudy periods, but also spells where the sun breaks through, best afternoon coast. Visibility good or very good at times, but poor in any heavy showers.
How Cold? (at 900m)
7C
Freezing Level
Above the summits
Planning Outlook
Slow-moving weather patterns continue through the Bank Holiday weekend as a weak zone of low pressure dominates over the British Isles. There will remain uncertainty of local day-to-day detail, but most likely the wind often light and temperatures generally mild, but less warm than midweek in western Scotland. Sunday into Monday, will see varied zones of heavy showers forming, local thunderstorms, but some places escaping often dry with the best sunny breaks for coastal areas as the convection builds inland. High pressure then tends to build from the west into midweek to bring a fair amount of dry weather, although rain bearing fronts may return to the northwest at times.