Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Dry, Inversion
Banks of cloud or fog on lower or middle slopes, but higher terrain likely clear and sunny above an inversion.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Dry, Inversion
Banks of cloud or fog on lower or middle slopes, but higher terrain likely clear and sunny above an inversion.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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
Friday 30th October 2026
Last updated
Thu 29th Oct 26 at
4:30PM
Summary for all mountain areas
Windy across Scottish mountains, gales on high tops most sustained toward west, where low cloud, patchy rain and drizzle will also occur. Drier and better cloud breaks inland and north of major hill groups. England & Wales starts with extensive fog mainly on low ground which tends to thin and break up.
Headline for Eryri / Snowdonia National Park
Moderate breeze, low cloud, inversion likely on high tops.
How windy? (On the summits)
Southerly 25mph, local gusts 30mph higher western summits in morning, gradually easing to 20mph, or slightly less late afternoon.
Effect of the wind on you?
Blustery and affecting ease of walking on higher tops and ridges in the morning, becoming smaller with time.
How Wet?
No rain expected
Fine drizzle on some slopes mainly toward east where in fog.
Cloud on the hills?
Fog mostly east in morning, higher tops clear above fog
Areas of fog from lower slopes upward in the morning, most extensive east Wales, patchier westwards. High terrain above 600m generally above the fog layer. Some patches may drift higher before then increasingly dispersing.
Chance of cloud free summits?
70% (some high tops above fog in morning)
Sunshine and air clarity?
Sun breaking through as fog clears, though high tops may be sunnier and in clear air; lower down staying hazy.
How Cold? (at 900m)
8C
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 31st October 2026
Last updated
Thu 29th Oct 26 at
4:30PM
How windy? (On the summits)
Southerly 10mph or less.
Effect of the wind on you?
Negligible
How Wet?
No rain expected
Some dampness if in early low-level fog.
Cloud on the hills?
Patches of valley fog largely clear
Areas of fog on valleys and lower slopes from dawn into morning, though northwestern areas clearer. Most hills above the fog layer, which tends to increasingly break up as the day goes on.
Chance of cloud free summits?
80% (tops above fog in morning)
Sunshine and air clarity?
Sunshine breaking through early fog on low ground, where staying hazy. Widely sunny all day with superb visibility higher slopes.
How Cold? (at 900m)
8C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 1st November 2026
Last updated
Thu 29th Oct 26 at
4:30PM
How windy? (On the summits)
North to northeasterly 20mph, at times 25mph on tops mainly in the morning.
Effect of the wind on you?
Fairly small effect on walking, but noticeably breezy and rather chilly over high terrain particularly in the morning.
How Wet?
Occasional drizzle
A little patchy drizzly rain possible, mainly northernmost areas, perhaps later eastern hills, amounting to very little, may fade out.
Cloud on the hills?
Low cloud or fog, may persist on hills
Fairly extensive low cloud, in places fog from lower elevations upward in the morning. Some highest summits may start near top of the cloud layer. Some breaks may emerge over western hills with time.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Rather cloudy and misty over the hills and to some lower elevations in morning, some improvement during day, best in west.
How Cold? (at 900m)
5C. Feeling just below 0C in breeze on tops.
Freezing Level
Above the summits
Planning Outlook
High pressure will dominate the weather pattern through into the start of November bringing settled conditions. Broadly dry for a week or so, but some areas of misty dampness and regular fog on low ground, whilst many hills would be in the clear above an inversion, particularly in Scotland next week. Overnight frost in glens will be common, plus some frost pockets for sheltered high terrain, whilst many summits will stay often just above freezing point. Light winds for several days into next week for Scotland, but stronger easterlies are likely for England and particularly Wales which would push cloud banks higher up here during the week ahead.