Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very wet underfoot.
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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Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very wet underfoot.
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
Friday 14th November 2025
Last updated
Thu 13th Nov 25 at
3:00PM
Summary for all mountain areas
Cold across Scotland and northern England, below freezing on Scottish mountains all day. Snow flurries toward north/east Highlands. Significant chill factor from strengthening easterly winds, gale-force all day southern Scotland and northern England. Severe gales and incessant heavy rain Wales and Peak District.
Headline for Eryri / Snowdonia National Park
Severe gales, constant rain, most intense east; significant flooding.
How windy? (On the summits)
Easterly, 45 to 60mph, into afternoon 70mph, in places later reaching 80mph; ferocious gusts including passes and in places downslope to west of high terrain.
Effect of the wind on you?
Increasingly severe conditions across the mountains, mobility widely difficult, gusts likely to knock you over, not just on highest terrain. Significant wind chill.
How Wet?
Rain all day, heaviest east, flooding
A slow-moving extensive swathe of rain, heaviest sustained falls over eastern hills. Patchier northwestern areas early morning. Turning to sleet or wet snow higher tops. Saturated ground, expect flooding, becoming significant later.
Cloud on the hills?
Extensive, lowest east
Likely to cover the hills widely, lowest bases 400-500m eastern areas, mostly 600m further west, some local higher breaks toward west coast.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast and dull, murkier east. Visibility very poor due to rain.
How Cold? (at 900m)
2 or 3C, dropping to 1C later (small change with height above 700m). Wind chill feeling like -10 to -15C.
Freezing Level
Dropping close to freezing point over higher slopes as the day progresses.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 15th November 2025
Last updated
Thu 13th Nov 25 at
3:00PM
How windy? (On the summits)
Easterly 50mph from dawn, powerful gusts downslope to west; tending to ease during morning to 30mph.
Effect of the wind on you?
Difficult particularly at first, turbulent gusts on some slopes may continue all day, but tending to improve.
How Wet?
Rain fading out, flooding
Continuing rain from overnight through dawn, but intensity easing and gradually becoming patchier during the day, leaving occasional mostly light rain afternoon. Considerable flooding expected.
Cloud on the hills?
Extensive, highest breaks west
Covering the hills widely, lowest bases in eastern areas around 500-600m, some breaks above 800m in west. May tend to lift gradually higher, best in west.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, some brighter skies may develop toward west coast. Hazy, visibility improving as rain eases.
How Cold? (at 900m)
2C (little change with height above 700m). Wind chill feeling like -15C in exposure.
Freezing Level
Just above freezing on some upper slopes.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 16th November 2025
Last updated
Thu 13th Nov 25 at
3:00PM
How windy? (On the summits)
East to northeasterly 20mph, to gusty 30mph 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?
Areas of cloud tending to lift
Banks of cloud drifting over slopes above 600 to 800m in the morning, lowest and most extensive in areas toward north and east. Tending to lift and break, western tops becoming often clear.
Chance of cloud free summits?
30% rising to 70%
Sunshine and air clarity?
Mostly cloudy, some sun may break through with time, mainly in west. Visibility tending to improve to be very good.
How Cold? (at 900m)
2 or 3C (small change of temperature with height above 700m). Feeling like -5 to -8C in exposure to wind.
Freezing Level
Just above freezing on upper slopes.
Planning Outlook
Colder air extends to all areas, staying below freezing over higher mountains most likely throughout the next week to 10 days. In the short-term, for Wales and south Pennines expect ongoing flooding from high rainfall on Friday, the rain eases into Saturday here. A lot of dry weather for Scotland this weekend, but some snow flurries move in from the north on Sunday. Areas of showery snow over the hills into next week coming in on often strong northerly winds, gale force into midweek. 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.