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.
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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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.
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
Monday 6th October 2025
Last updated
Sun 5th Oct 25 at
4:30PM
Summary for all mountain areas
Gales widespread across mountains in Scotland and on higher tops in northern England, severe toward north and especially northwestern Highlands. Rain, drizzle and low cloud shrouding hills widely in west, better eastwards. Heavier rain later west Scotland. Marked wind chill despite mild air.
Headline for Eryri / Snowdonia National Park
Near-gales on higher terrain. Low cloud, patchy drizzle.
How windy? (On the summits)
Gusty west turning southwesterlies 25 to 35mph, may reach 40mph at times tops around Snowdon/Yr Wyddfa, a little lower toward mid-Wales.
Effect of the wind on you?
Arduous walking conditions around tops. In exposure, buffeting gusts will require bracing/crouching to maintain balance.
How Wet?
Drizzle high terrain and west
Fine drizzle in and around low cloud over high tops from Snowdonia south to mid-Wales, more broadly drizzly west of high ground. Amounting to little in total. Only odd drizzly spots east Wales.
Cloud on the hills?
Extensive, lowest west coasts
Extensive down to low slopes facing Llyn Peninsula and Cardigan Bay, often to 400-500m many western hills. Higher bases north/east of the A5 and into east Wales, mostly above 600m, some breaks above 700m.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Sunshine unlikely. Mostly poor visibility, locally better east Wales.
How Cold? (at 900m)
10C. Feeling near freezing in direct wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 7th October 2025
Last updated
Sun 5th Oct 25 at
4:30PM
How windy? (On the summits)
Southwesterly 25 to 40mph, very gusty in places on tops and ridges, locally also passes, speeds likely to vary during day.
Effect of the wind on you?
Buffeting gusty winds will make walking strenuous in exposure and affect balance, but in places at times smaller effects.
How Wet?
Drizzle
Small amounts of rain in total, but often feeling damp across the hills, some periods of steadier drizzle over western slopes. Late in the day, greater risk of some steadier rain developing from north.
Cloud on the hills?
Extensive, lowest west
Shrouding the mountains widely above 400-600m in western areas, to some lower slopes on Llyn peninsula and west coast. Higher bases above 600-700m toward and north of Ogwen, also Berwyn group.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, often dull western areas, hazy at best. Locally brighter east Wales, better visibility.
How Cold? (at 900m)
7 or 8C, little change all day, then into evening-night dropping to 4C. Directly in the wind feeling near/below 0C.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 8th October 2025
Last updated
Sun 5th Oct 25 at
4:30PM
How windy? (On the summits)
Northwest later westerly 15 to 20mph, occasionally 25mph higher tops.
Effect of the wind on you?
Fairly small, but feeling blustery in places on exposed tops, may start to affect balance on ridges. Feeling cool.
How Wet?
Little or no rain
A little rain possible from dawn as remnants of a front clears southwards. Then largely dry, bar an odd brief drizzly shower.
Cloud on the hills?
Mostly high tops with some breaks
Varied banks of cloud over the hills from dawn, soon mostly confined to upper slopes. Patches may come and go above 700-900m, but good breaks likely for periods to the tops.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Early cloud breaks to give occasional sun. Good visibility some haze.
How Cold? (at 900m)
4 or 5C. Feeling below freezing in the wind.
Freezing Level
Above the summits
Planning Outlook
West-southwesterlies prevail - wet over western mountains early this week, particularly Scotland. Fast-flowing streams and further flooding expected. Dropping cooler on Tuesday-Wednesday, prepare for considerable chill factor in the stronger winds over Scottish mountains. Pressure is due to gradually rise from the south in the second half of the week, rain fading out and winds dropping lighter across many places to leave a more optimistic outlook into the weekend for most places - northwest Scotland may keep a prevailing westerly with more cloud and a stronger wind.