Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
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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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 15th November 2025
Last updated
Fri 14th Nov 25 at
4:20PM
Summary for all mountain areas
High fog banks in the east Scottish Highlands, dry with sunshine west; windy early but easing. A thin layer of snow blankets the summits. Early gales in England and north Wales ease but remaining blustery. Rain here too, also easing though lingering south Pennines. Flood risk in Wales and south Pennines.
Headline for Eryri / Snowdonia National Park
Flood risk, rain fading; early gales, easing
How windy? (On the summits)
Easterly 40-50mph from dawn, powerful gusts downslope to west. Tending to ease during morning, mostly in the south where speeds drop towards 20mph afternoon. May remain closer to 30mph over northern tops.
Effect of the wind on you?
Difficult walking at first with wind chill; turbulent gusts over most high terrain are likely all day though a general improvement in conditions.
How Wet?
Rain fades into high terrain drizzle; flooding
Continuing rain from overnight through dawn, but intensity easing and gradually becoming patchier during the day. Most rain will fade afternoon but fine drizzle will linger in cloud over high slopes. Considerable flooding expected.
Cloud on the hills?
Extensive
Covering the hills widely, lowest bases in eastern areas around 400-600m, some higher breaks in the west though unlikely above 700m.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, some brighter skies may develop toward west coast. Visibility largely poor though some improvement as rain eases.
How Cold? (at 900m)
3 or 4C - little change with height above 700m. Temperatures a degree warmer on western slopes, perhaps several degrees warmer mid-Wales. Wind chill feeling like -10C in exposure early in the day.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 16th November 2025
Last updated
Fri 14th Nov 25 at
4:20PM
How windy? (On the summits)
East to northeasterly 20-25mph, to gusty 35mph in places around high tops and some passes, gusty downslope to west.
Effect of the wind on you?
Blustery, some buffeting gusts in places, not just on highest terrain; considerable wind chill in exposure.
How Wet?
Light showers
A little rain in the wind at times, occasional light showery rain mostly Carneddau to areas near Bala, mainly morning.
Cloud on the hills?
Early cloud slowly lifting and breaking
Banks of cloud drifting over slopes above 600 to 800m in the morning, lowest and most extensive in areas toward north and east though perhaps more widespread. Tending to lift and break, western tops becoming often clear.
Chance of cloud free summits?
20% rising to 70%
Sunshine and air clarity?
Mostly cloudy, sun breaking through with time, notably west. Visibility tending to improve to be very good.
How Cold? (at 900m)
2 or 3C (small change of temperature with height above 700m). Dropping slightly. Feeling like -5 to -8C in exposure to wind.
Freezing Level
Lowering to just above freezing on upper slopes.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 17th November 2025
Last updated
Fri 14th Nov 25 at
4:20PM
How windy? (On the summits)
Northerly 25-35mph. Likely easing, possibly a northwesterly shift as well though detail is uncertain.
Effect of the wind on you?
Walking strenuous with wind chill in the morning, trending towards lesser impacts.
How Wet?
No rain expected
Cloud on the hills?
Only high slopes of northern hills
Cloud will come and go on high northern slopes likely all day, most frequently around Carneddau. Hills clear elsewhere, some local valley fog patches are possible.
Chance of cloud free summits?
60% northernmost tops, 90% elsewhere
Sunshine and air clarity?
A patchwork of cloud and sun on northernmost slopes, sunshine elsewhere. Excellent visibility.
How Cold? (at 900m)
0C, dropping a degree. Feeling like -10C in strongest morning wind.
Freezing Level
900m at dawn, lowering to 700-800m. Frost is likely to lower elevations at dawn as well.
Planning Outlook
Rain eases in Wales and the southern Pennines though flood risk may linger for another day. Winds shift widely northerly as the weekend turns into next week, drawing cold air widely across the country; staying below freezing over higher mountains most likely throughout the next week to 10 days. Snow flurries move in on this northerly wind on slopes exposed to coasts; snow most frequent toward north of the Highlands with some locally more substantial accumulations over higher terrain; some accumulating upland snow possible more widely during Tuesday as a front drifts southward. Elsewhere, sunny breaks will occur at times frequent and prolonged. Winds often strong, at times gale force; significant wind chills likely.