Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Moderate rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Cool
Temperatures above freezing but typically no higher than +5C over the tops - if exposed to brisk winds will feel sub-zero. May not feel cold when climbing, but noticeably cold when stationary. Carry suitable clothing.
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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.
Moderate rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Cool
Temperatures above freezing but typically no higher than +5C over the tops - if exposed to brisk winds will feel sub-zero. May not feel cold when climbing, but noticeably cold when stationary. Carry suitable clothing.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 30th April 2024
Last updated
Mon 29th Apr 24 at
4:30PM
Summary for all mountain areas
Brisk southeasterly winds, up to gale force some tops; strengthening across the Highlands. A belt of rain draped across west coast of Scotland south from Skye, also affecting Galloway, and fairly persistent rain for west and south Wales. Drier further east and north with hazy sunshine. Fairly mild air.
Headline for Eryri / Snowdonia National Park
Windy. Rain frequent west, heavy for a time, cloud banks.
How windy? (On the summits)
Southerly speeds varied: typically 35 to 45mph, strongest toward the west in the morning. Gradually easing toward 20mph later in the day.
Effect of the wind on you?
Walking widely arduous on higher areas, and wind chill considerable, although conditions are likely to ease through the afternoon.
How Wet?
Rain turning heavy, clearing later
Frequent rain western areas around the Glyders, Snowdon/Yr Wyddfa and toward the Lleyn peninsula, persistent and heavy for a time into afternoon then improving from west as bursts of rain then move further eastwards.
Cloud on the hills?
Fairly extensive, lowest near coast
Generally extensive above 600 to 900m, although may shroud lower slopes western flanks of Snowdon to Lleyn peninsula. Higher bases Carneddau with some breaks, also clearing summits in east Wales at times.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little or no sun. Good visibility at times, but poor in rain.
How Cold? (at 900m)
3 to 5C. Will feel as cold as -8C directly in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 1st May 2024
Last updated
Mon 29th Apr 24 at
4:30PM
How windy? (On the summits)
Southeasterly between 10 and 20mph: generally strongest in the morning.
Effect of the wind on you?
Small
How Wet?
Risk showers afternoon
Risk scattered heavy showers afternoon.
Cloud on the hills?
Soon all clearing
Patchy banks of cloud on some eastern slopes in mid-Wales in the morning. Any other patches soon dispersing.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Sun and varied high cloud. Excellent visibility.
How Cold? (at 900m)
3C rising toward 9C
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 2nd May 2024
Last updated
Mon 29th Apr 24 at
4:30PM
How windy? (On the summits)
Easterly 25mph to suddenly gusty 40mph around some tops, powerful gusts around some tops and downslope to west.
Effect of the wind on you?
Locally very varied, but expect sudden buffeting making walking arduous in places not just on higher terrain.
How Wet?
Risk rain on and off locally
Uncertain progress of a slow-moving front, may give several hours of rain, greatest risk toward mid-Wales, perhaps most rain staying further south. Scattered bursts of rain from elevated cloud layers.
Cloud on the hills?
Risk patchy cloud banks
Many western mountains often clear, but occasional banks of cloud rolling across some slopes. Banks of low cloud may persist toward eastern mid-Wales.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Weak sun due to high cloud layers. Hazy.
How Cold? (at 900m)
7C to locally 10C west. Feeling close to freezing directly in wind.
Freezing Level
Above the summits
Planning Outlook
High pressure to the north and a slow-moving area of low pressure circulating to the south during midweek. Scattered showers possible for the Highlands, but a lot of dry weather - warmest and clearest in the west. Powerful easterly winds will be very gusty by Thursday into early Friday, especially southern Scotland and northern England, then easing. A front brings a risk of persistent rain for Wales on Thursday. Slow-moving weather patterns are likely to continue onward into the Bank Holiday weekend, giving considerable uncertainty of local day-to-day detail, but most likely the wind often light and fairly warm overall. A good amount of dry and bright weather, but risk of locally thundery showers forming.