Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate 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.
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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 19th October 2026
Last updated
Sun 18th Oct 26 at
4:00PM
Summary for all mountain areas
A fine but chilly day for the Highlands with sunshine, but cloud will roll in from the southeast to increasingly cover hills in southern areas in the afternoon. Cloudier all day for northern England with a little rain, strong and gusty easterly winds. Early rain in Wales clears, low cloud tending to break with time.
Headline for Eryri / Snowdonia National Park
Gusty wind. Early rain and lowest cloud east, improving.
How windy? (On the summits)
Easterly 30 to 40mph very gusty around high passes and summits in the morning, lessening a little to typically 25-30mph, but still some gusty areas afternoon.
Effect of the wind on you?
Blustery, in places more notable buffeting gusts and considerable wind chill in exposure on the mountains.
How Wet?
Early rain and drizzle fades
Rain and drizzle over a few hours from dawn, especially more eastern hills, patchier westwards. Fading to just odd pockets of drizzle into middle of day then substantially dry afternoon. Some rain and drizzle returns into night.
Cloud on the hills?
Fairly extensive, lowest east in morning, improving and breaking afternoon
Covering most higher slopes above 600-700m in the morning, or to lower slopes in east, whilst some breaks higher up near west coast. Base tends to slowly rise and break a little higher widely with time, leaving just patches on high tops as afternoon goes on.
Chance of cloud free summits?
20% morning, rising to 70% afternoon.
Sunshine and air clarity?
Cloudy and dull morning, reduced visibility where damp, tending to improve to be good as cloud rises, some brighter skies and occasional sun mostly west afternoon.
How Cold? (at 900m)
4 or 5C, little change all day. Feeling like -5C in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 20th October 2026
Last updated
Sun 18th Oct 26 at
4:00PM
How windy? (On the summits)
Southeasterly 15 to 25mph, later may shift south-southwesterly.
Effect of the wind on you?
Fairly small, some gusty spots may feel more noticeable and rather cool.
How Wet?
Rain and drizzle
Rain much of the day, some steadier heavier falls may be focused toward the east, whilst west coastal areas may see patchier lighter rain. May fade and break up a little toward late afternoon-evening.
Cloud on the hills?
Fairly extensive, may be better west
Overcast, dull and misty from many lower slopes upward, particularly eastern hills. Cloud base higher west and northwestward, some breaks above 600-700m, locally may be clearer near coast.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, dull and misty, from many lower slopes upward in east, though local brighter skies toward the west coast.
How Cold? (at 900m)
6C, little change all day. Feeling like 0C in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 21st October 2026
Last updated
Sun 18th Oct 26 at
4:00PM
How windy? (On the summits)
Variable and perhaps a brief lull below 20mph, but likely a rapid increase westerly 30-40mph, risk 50mph.
Effect of the wind on you?
Expect deteriorating conditions making walking difficult and sudden buffeting gusts. Significant wind chill.
How Wet?
Frequent heavy rain, snow tops
Often raining throughout the day, a mix of steady falls and some heavier bursts at times, which may set in for longer over western mountains, at times snow on higher tops above 800-900m, risk of hail.
Cloud on the hills?
Fairly extensive higher areas
Often covering higher slopes above 700-800m in western areas, sometimes lower near coast. Frequent banks extend inland, local breaks intermittently in east.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy. Visibility often reduced in rain, at times poor, particularly higher up if snowing.
How Cold? (at 900m)
1 or 2C, little change all day. Feeling like -10 to -13C if exposed to stronger wind.
Freezing Level
Close to freezing around 1000m.
Planning Outlook
A complex weather setup into midweek with slow-moving fronts bringing areas of rain and fairly extensive low cloud over the hills, varied wind speeds. Thursday may offer a window of drier weather and light winds, but by Thursday night into Friday a storm system likely moves across England & Wales with heavy rain and gales, possibly turning to snow on higher mountains. Scotland may avoid this system and just see showers mostly in the west for Friday, wintry on tops. Another Atlantic storm is then forecast to track further north over the weekend bringing widespread severe gales to high terrain, heavy rain then showery westerlies. Generally unsettled weather likely prevails to the end of October.