Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 2nd October 2026
Last updated
Thu 1st Oct 26 at
3:22PM
Summary for all mountain areas
Continuing mild, but gales - or in the north severe gales on many mountains - will make it feel cold due to wind chill. A weakening front will bring a little rain eastwards before a further front brings heavier rain in from the southwest later in the day.
Headline for Eryri / Snowdonia National Park
Upland gales and a little rain western hills.
How windy? (On the summits)
South to southwesterly, ranging from 35 to 45 or by afternoon 50-55mph higher tops Snowdon range.
Effect of the wind on you?
Difficult conditions will make balance difficult and walking very strenuous on higher areas and wind chill significant - particularly Snowdon range.
How Wet?
Occasional rain, mainly or only Snowdon range
Substantially dry mid and east Wales, although here and there a drizzly shower. These more likely western hills, particularly western slopes Snowdon range.
Cloud on the hills?
Extensive on higher areas
Typical cloud base 600 to 750m by midday. However, in rain, patches nearer 450m, and westernmost slopes north from Lleyn peninsula may have extensive fog above 300m, with few breaks above 600m.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Glimpses of sun, mainly lower slopes near Monadhlaith and eastern hills elsewhere. Hazy toward Lleyn peninsula, otherwise mostly very good visibility.
How Cold? (at 900m)
11C, but feeling as cold as minus 2C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 3rd October 2026
Last updated
Thu 1st Oct 26 at
3:22PM
How windy? (On the summits)
West-southwesterly 10-15mph, stronger for a few early hours, to 25mph briefly.
Effect of the wind on you?
Mostly small.
How Wet?
Early rain
Rain fairly widespread before dawn, perhaps heavy on high terrain and western slopes. From dawn, rain will ease and break up, a little drizzle perhaps lingering on high western terrain briefly.
Cloud on the hills?
Probably clearing most hills
Cloud shrouds high terrain to start, most extensive toward west coast, briefly to at least middle slopes. Cloud will lift and break up as morning goes, and perhaps substantially clearing. Amount of clearing uncertain towards mid-Wales; greatest risk of sustained cloud on west aspects.
Chance of cloud free summits?
20% rising to 80%
Sunshine and air clarity?
Intermittent sun breaking out. Visibility becomes good.
How Cold? (at 900m)
7C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 4th October 2026
Last updated
Thu 1st Oct 26 at
3:22PM
How windy? (On the summits)
Southwesterly, 20 to 25mph; strongest higher mountains Snowdon range, where perhaps at times 30mph.
Effect of the wind on you?
Mostly fairly small.
How Wet?
Drizzly rain, mainly or only western hills.
Pockets of drizzle coming in off the sea onto western hills, mainly onto south facing slopes north from Lleyn peninsula. Elsewhere, drizzle, if any, rarely.
Cloud on the hills?
Foggy across nearly all mountains all day
Persistent low cloud penetrating inland from about dawn will persist all day although may break up before reaching hills north from Berwyn mountains. Near the west coast the cloud forming from just above valleys. Cloud base will rise eastwards to 300-500m before progressively breaking up.
Chance of cloud free summits?
10% west to 80% east
Sunshine and air clarity?
Sunshine mainly easternmost areas where it may be extensive. Mostly very good or excellent visibility
How Cold? (at 900m)
10C.
Freezing Level
Above the summits.
Planning Outlook
Rain at some stage more or less daily on most mountain areas through the coming week. However, frequently dry E & S Wales and S Pennines. Frequently windy Scottish Highlands, whilst progressively further south, periods of strong winds will be increasingly infrequent. A hint of a brief period of much colder weather around the middle of next week.