Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Mild
Temperatures +5C or above on higher summits. Comfortable temperatures on lower terrain, but feeling cool if exposed to breeze higher up, especially if stationary. Pack extra layers.
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Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Mild
Temperatures +5C or above on higher summits. Comfortable temperatures on lower terrain, but feeling cool if exposed to breeze higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 21st February 2025
Last updated
Thu 20th Feb 25 at
3:45PM
Summary for all mountain areas
Severe conditions over the mountains, storm-force winds most of daylight. Wet all day most areas, heaviest rain on south-facing hill groups, risk of local flooding. Least rain toward far north of the Highlands. Cloud shrouding the hills widely. Well above freezing with an ongoing thaw.
Headline for Eryri / Snowdonia National Park
Stormy upland winds. Frequent or persistent rain morning.
How windy? (On the summits)
Southerly 60-80mph for most of daylight, powerful gusts in places downslope to north. Speeds moderating evening into night.
Effect of the wind on you?
Any mobility very difficult on mountains; walking challenging even on mid to lower slopes in exposure. Severe wind chill.
How Wet?
Rain mostly in the morning
Rain most persistent on the Snowdon range and to the southwest, heavy at times in the morning. Often raining though lighter to the northeast. Fading to become drier with scattered showers in the afternoon.
Cloud on the hills?
Extensive south, patchy/clear spells north
Fog often down to lowest slopes between the Snowdon area and Lleyn peninsula. Higher bases near Ogwen valley and north, occasional clear spells here. Bases rising widely in afternoon, some breaks.
Chance of cloud free summits?
10% later 30%
Sunshine and air clarity?
Overcast morning, a little brighter afternoon, glimpses of sun mainly north. Mostly poor visibility, very poor in precipitation; improving afternoon.
How Cold? (at 900m)
7C. Feeling as cold as -12C in wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 22nd February 2025
Last updated
Thu 20th Feb 25 at
3:45PM
How windy? (On the summits)
Southwesterly 25-30mph.
Effect of the wind on you?
Some inconvenient winds, stability may be challenged on exposed terrain. Notable wind chill.
How Wet?
Drizzly spells Snowdon and southwest
Intermittent drizzle into areas around Snowdon and southwest. Mostly dry north and east.
Cloud on the hills?
Southeast and high tops
Cloud banks frequent or persistent in southwest regions and high terrain with bases reaching towards 700m. Cloud more patchy and often clear from Ogwen valley northward.
Chance of cloud free summits?
30% southwest, 70% northeast
Sunshine and air clarity?
High cloud clears after noon allowing sunshine into the northeast. Mostly good visibility, excellent northeast.
How Cold? (at 900m)
2 to 3C. Feeling like -5C in wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 23rd February 2025
Last updated
Thu 20th Feb 25 at
3:45PM
How windy? (On the summits)
South to southwesterly 60 to 70mph, for periods over 80mph at least in gusts on higher tops.
Effect of the wind on you?
Severe conditions: mobility challenging even at mid-elevations, frequently knocking you off your feet where exposed.
How Wet?
Heavy rain
Rain setting in around dawn, soon heavy, continuing possibly for much of the daytime, although by later afternoon may become showery.
Cloud on the hills?
Extensive
Shrouding the mountains likely all day, from low-to-mid slopes upward western coastal areas, mid-slopes inland. Highest of any breaks north of Ogwen valley.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast and dull, sun unlikely. Hazy, poor visibility in precipitation.
How Cold? (at 900m)
2C rising to 4C. Feeling like -10 to -15C due to wind chill.
Freezing Level
Above the summits.
Planning Outlook
All terrain will have thawed by the weekend; very wet underfoot with several spells of heavy rainfall, highest totals on south & southwest-facing hills bringing local flooding. A relative improvement on Saturday for many places, but remaining windy, up to gale-force higher northern Scottish tops - rain still frequent around Skye. Deteriorating again into Sunday with further storm-force mountain winds. Chillier westerly winds prevail next week, a return to mostly sub-freezing conditions over Scottish Munros, whilst lower Scottish hills plus mountains in England & Wales will see some freeze and thaw. Showery conditions with hail and upland snow, mixed with occasionally more widespread precipitation.