Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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.
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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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.
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
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
Sunday 4th October 2026
Last updated
Sat 3rd Oct 26 at
1:30PM
Summary for all mountain areas
A weakening warm front will gradually bring low cloud to western hills of NW England and Wales. Blustery N England. In Scotland, widespread gales; in the NW & W Highlands, heavy rain and fog, but only occasional rain eastern and southern Scottish mountains.
Headline for Eryri / Snowdonia National Park
Low cloud slowly shrouding mainly west Wales. Fairly light wind.
How windy? (On the summits)
Southwesterly, 15 to 20mph, perhaps 25mph on higher summits Snowdon range.
Effect of the wind on you?
Small.
How Wet?
Extensively or completely dry.
Risk fine drizzle rarely, more or less confined to slopes nearest the west coast in the Snowdon range.
Cloud on the hills?
Fog slowly enveloping mainly western mountains in Snowdon range
Low cloud penetrating slowly inland after dawn to shroud particularly westernmost slopes in Snowdon range above 200 or 300m. Higher tops may be above the cloud. Patches above 500m will slowly extend east, but are unlikely to reach east Wales north from Berwyn mountains.
Chance of cloud free summits?
Dropping to 20% west; 80% east Wales
Sunshine and air clarity?
Sunshine will tend to become confined to east Wales. Mostly very good or excellent visibility
How Cold? (at 900m)
9C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 5th October 2026
Last updated
Sat 3rd Oct 26 at
1:30PM
How windy? (On the summits)
Southwesterly typically 20mph, but where exposed on higher summits Snowdon range, sometimes 30mph.
Effect of the wind on you?
Mostly fairly small, but balance sometimes tricky in sudden gusts, mainly Snowdon range.
How Wet?
Substantially dry: risk isolated drizzle W.
A little drizzle some western mountains. Elsewhere isolated if any drizzle.
Cloud on the hills?
Fog probable higher western areas
Confidence low: Blanket of low cloud may continue to drift in off the sea to the west, shrouding even lower nearby hills in fog - possibly most or all day. But well inland, the cloud may well break up completely, and the clearance extend back toward the coast.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Mostly cloudy and intermittently misty, although patchwork of sun and excellent visibility easternmost Wales.
How Cold? (at 900m)
11C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 6th October 2026
Last updated
Sat 3rd Oct 26 at
1:30PM
How windy? (On the summits)
Westerly 20-30mph, before later a drop to 15mph as wind changes toward northerly.
Effect of the wind on you?
Likely to impede ease of walking on higher areas. Marked wind chill.
How Wet?
Rain from time to time, mainly western hills
Rain and drizzle on and off, mostly west Wales. Total rainfall mostly fairly small. May clear from north late in day - timing uncertain.
Cloud on the hills?
Blanket of fog on the hills
Fog across the hills, from 300 to 450m up, lowest more western hills. May temporarily drop below 200m coastal slopes. Could begin to clear from north before sunset.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Widely dull and misty. Possible marked improvement late in day. Visibility often excellent east Wales.
How Cold? (at 900m)
9C; may drop a few degrees late in day.
Freezing Level
Above the summits.
Planning Outlook
Rain at some stage more or less daily on most mountain areas through the coming week. However, total rainfall small, and frequently dry E & S Wales and S Pennines. Frequently windy Scottish Highlands, whilst progressively southwards, periods of strong winds will less frequent. A brief period of colder less windy weather around the middle of next week brings snow showers to some northern mountains.