Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Very murky conditions, the mountains shrouded in fog, making navigation challenging. Map and compass essential.
Mild
Temperatures +5C or above even 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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Very murky conditions, the mountains shrouded in fog, making navigation challenging. Map and compass essential.
Mild
Temperatures +5C or above even 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
Sunday 15th September 2024
Last updated
Sat 14th Sep 24 at
4:05PM
Summary for all mountain areas
Often strong winds across most hills, feeling chilly especially Scottish tops. A zone of frequent rain and heavy showery bursts passes eastwards across the Highlands, particularly northern areas. A front moves slowly south over England and Wales bringing rain, drizzle and low cloud, gradually clearing northern England later.
Headline for Eryri / Snowdonia National Park
Windy, rain, drizzle and low cloud, much of the day west.
How windy? (On the summits)
West to southwesterly 30 to at times 40mph, strongest over Snowdon range until later afternoon.
Effect of the wind on you?
Walking often impeded by the wind, and sometimes arduous with considerable wind chill.
How Wet?
Rain and drizzle, manly western hills
A mix of periods of drizzly rain - mostly western hills and one or two bursts of heavier rain. Little rain mid Wales, particularly Berwyn mountains.
Cloud on the hills?
Mountains mostly covered; highest cloud base east Wales
Cloud will often shroud mountains from lower slopes upward toward west coast (lowest Lleyn peninsula to Snowdon). Highest cloud bases will be east Wales and perhaps mid Wales where cloud rarely below 500m, and breaks to 750m.
Chance of cloud free summits?
10%, to 30% east Wales
Sunshine and air clarity?
Little if any sunshine - occasional sun here and there lower slopes east Wales. Hazy and visibility often poor in drizzle.
How Cold? (at 900m)
9C, but where exposed to the wind, will feel near or below freezing point on highest tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 16th September 2024
Last updated
Sat 14th Sep 24 at
4:05PM
How windy? (On the summits)
Varied direction; 10mph or less, locally southerly 10-15mph on/nearest Llyn peninsula.
Effect of the wind on you?
Negligible
How Wet?
Rain very unlikely
Cloud on the hills?
Very little if any
Chance of cloud free summits?
90%
Sunshine and air clarity?
Bright sunshine and superb visibility although ribbons of fog some valleys will disperse through morning.
How Cold? (at 900m)
9 rising to 14C
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 17th September 2024
Last updated
Sat 14th Sep 24 at
4:05PM
How windy? (On the summits)
Variable and little wind at first, becoming easterly, tending to increase 10 to 20mph, gustier later in day.
Effect of the wind on you?
Small, but starting to feel breezier over the hills.
How Wet?
Rain not expected
Cloud on the hills?
Hills clear
Possible brief patches of misty cloud drifting onto slopes in eastern mid-Wales early in day, soon all dispersing.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Extensive sunshine. Some mist or haze in valleys early in day, otherwise visibility excellent.
How Cold? (at 900m)
13C, locally slightly warmer western areas into afternoon. (Tops warmer than valleys early morning).
Freezing Level
Above the summits.
Planning Outlook
High pressure becomes established over Britain at the start of the new week, drifting toward Scandinavia by midweek. A weak front grazing past northwest Scotland on Tuesday brings low cloud and some possible dampness for a time here. Otherwise, very warm and particularly on western mountains often sunny. However, particularly in the mornings low cloud coming in off the North Sea will often envelop more eastern mountains from midweek. Fresh easterly breezes affecting England and Wales in the second half of the week, locally becoming very gusty. Lighter winds generally in Scotland.