Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Hazy, some fog banks
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Hazy views with lack of air clarity, particularly on lower terrain, some fog banks on hills making navigation locally more difficult. If above an inversion, the air outstandingly clear.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Hazy, some fog banks
Hazy views with lack of air clarity, particularly on lower terrain, some fog banks on hills making navigation locally more difficult. If above an inversion, the air outstandingly clear.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 16th October 2025
Last updated
Wed 15th Oct 25 at
4:38PM
Summary for all mountain areas
Higher mountain tops particularly in the southern half of the Highlands remain above an inversion; low-level cloud rising, locally thinning gradually. Further north and especially northwest, cloud will cloak upper slopes. In the Lakes and Snowdonia, very highest summits also near or just above the cloud-top.
Headline for Eryri / Snowdonia National Park
Low cloud mostly eastern hills. Western tops mostly clear. Light wind.
How windy? (On the summits)
Direction variable through trending east-southeasterly 10mph or less. Some odd stronger gusts may blow.
Effect of the wind on you?
Small
How Wet?
No rain expected
Cloud on the hills?
Patchy cloud on east slopes, clearer overall western hills
Cloud at various low and middle heights towards east Wales in the morning, very little further west over Snowdonia/Eryri and here highest summits likely above patchy cloud. Base tending to drift higher up as the day goes on, well broken in west, but often covering higher slopes above 600-700m from Berwyn to areas south from Bala.
Chance of cloud free summits?
70% (above cloud on some highest tops).
Sunshine and air clarity?
Often sunny west of high tops. Highest terrain locally above cloud in very clear air, hazy lower down but improving.
How Cold? (at 900m)
6 to 8C. Starting cooler in the valleys, particularly west of high tops.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 17th October 2025
Last updated
Wed 15th Oct 25 at
4:38PM
How windy? (On the summits)
Generally southeasterly though variable, around 10mph. Rising towards 15mph around nightfall.
Effect of the wind on you?
Mostly small
How Wet?
No rain expected
Cloud on the hills?
Lifting to high terrain, some breaks
Banks of cloud on mid and upper slopes with patches lower down at dawn, some local valley mist possible. Some high tops may start clear, but cloud lifts to high terrain, breaking occasionally for clear summits.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Intermittent sunshine, some high cloud around. Good visibility though some haze.
How Cold? (at 900m)
6C
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 18th October 2025
Last updated
Wed 15th Oct 25 at
4:38PM
How windy? (On the summits)
Southeasterly, tending to increase 20 to 30mph, later in day 40mph, very gusty in places.
Effect of the wind on you?
Becoming more blustery, starting to affect ease of walking and balance on exposed tops and ridges.
How Wet?
Rain unlikely until late
Some patchy rain may encroach from west later in day.
Cloud on the hills?
Good breaks north
Patchy cloud on some slopes in morning, lifting and breaking from most hills, best breaks to summits in north Eryri.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Glimpses of sun, best in north. Visibility good, but some haze.
How Cold? (at 900m)
6C, but feeling nearer -5 in the stronger wind.
Freezing Level
Above the summits
Planning Outlook
Gradually lowering pressure over the next few days will tend to push the inversion layer increasingly higher up - with time the cloud banks enveloping even higher slopes, although this level will vary across the country up to Saturday. Southeasterly breezes will start to freshen, soonest in west coastal areas. Breaks in the cloud sheet will therefore be best in areas to the northern lee-side of major hill groups. By late Saturday, winds may approach gale-force in the west. Fronts moving in from the Atlantic bring a risk of rain onward into Sunday, although extent of this is uncertain. A more unsettled outlook into next week is likely.