Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
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.
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.
Click an icon for more information or click here for a key to all icons.
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.
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.
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
Tuesday 20th October 2026
Last updated
Mon 19th Oct 26 at
4:53PM
Summary for all mountain areas
Damp for most, fairly widespread drizzle, rain, and low cloud; a rising risk of steady falls with heavy bursts in England and Scotland. Areas north of major hill groups see lighter, patchier rain, and north Scotland starts drier. Scotland will be windy; lighter wind southward, particularly Wales.
Headline for Eryri / Snowdonia National Park
Rain, drizzle, and low cloud, most east; may later improve
How windy? (On the summits)
Generally southeasterly 10-20mph, though likely easing to a lull for several hours at least. Later orienting southwesterly, beginning to strengthen into evening, risk gusts to 40mph+ overnight.
Effect of the wind on you?
Fairly small during daylight, a few gusty spots impact comfort of walking. Conditions deteriorate into night.
How Wet?
Rain and drizzle
Rain much of the day, some steadier heavier falls may be focused toward the east, whilst west coastal areas see patchier lighter rain, some drier moments. Fading and breaking up toward late afternoon-evening for a dry window before retuning overnight.
Cloud on the hills?
Fairly extensive, may be better west
Cloud perhaps well-broken west of high terrain just to start, but will soon fill in extensively, from lower slopes up on south and eastern slopes. Bases higher towards Anglesey, generally around 600m or occasionally higher, but will lower here during heavier rain. Some chance of breaking from the west late in the day.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, dull and misty, from many lower slopes upward in east. Occasional sunny glimpses towards northwest hill groups, and more sun may break out late in the day.
How Cold? (at 900m)
6C, little change all day or overnight. Feeling like 0C in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 21st October 2026
Last updated
Mon 19th Oct 26 at
4:53PM
How windy? (On the summits)
Variable and perhaps a brief lull below 20mph, but likely a rapid increase westerly 30-35mph, risk 45mph+.
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, some sunny glimpses forming later. Visibility often reduced in rain, at times poor, particularly higher up if snowing.
How Cold? (at 900m)
2 or 3C, little change all day. Feeling like -10 to -13C if exposed to stronger wind.
Freezing Level
Mostly above the summits, but may approach freezing on highest tops at times.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 22nd October 2026
Last updated
Mon 19th Oct 26 at
4:53PM
How windy? (On the summits)
Westerly 20-25mph turning southerly, briefly lessening, then sharply rising towards 40mph, further rising overnight.
Effect of the wind on you?
Generally fairly small, some blustery moments and feeling chilly, deteriorating to severe conditions overnight.
How Wet?
Shower fade, then late rain
Showers drifting from Cardigan Bay from dawn, may briefly cluster but tending to fade to just isolated spots of rain, many hills dry for several hours. Later, rising risk of rain returning, setting in into night and increasingly heavy.
Cloud on the hills?
Lifting to summit caps, later deteriorating
Most hills above 700m begin shrouded, banks regularly lowering to 400m or lower towards Cardigan Bay around showers. Cloud will tend to lift and break as showers fade, to mostly just caps above 900m for a time, then returning evening and increasingly extensive into night.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Patchy sunshine, brighter windows for a time east but trending overcast as evening approaches. Very good visibility.
How Cold? (at 900m)
2C rising to 4C, likely rising further into night. Feeling near or colder than -5C in wind.
Freezing Level
Above the summits.
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 and direction, though a risk of gales quickly sweeping into England and Wales Wednesday. Thursday may offer a window of brighter weather and lessening wind, but Thursday evening into night sees a deep area of low pressure move 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. Atlantic southwesterlies then follow into the weekend: strong wind, periods of low cloud and rain, brighter windows too but with showers in the west. Some risk of stormy conditions in Scotland. Generally unsettled weather likely prevails to the end of October.