Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday'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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
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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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 6th November 2025
Last updated
Wed 5th Nov 25 at
4:30PM
Summary for all mountain areas
Mild and damp southerly air - lowest cloud on south-facing hills. Morning rain and drizzle in the Highlands easing off, some rise of cloud base. Gusty in places, strongest wind western Scotland. England sees little more than patchy rain or drizzle, whilst Wales has some pulses of heavier rain moving up from the south.
Headline for Eryri / Snowdonia National Park
Varied cloud, local bursts of rain forming. Moderate breeze.
How windy? (On the summits)
Southerly 15 to 25mph, occasional 30mph, gusty around rain locally.
Effect of the wind on you?
Fairly small, but some gustier moments starting to affect comfortable walking on exposed terrain.
How Wet?
Local bursts of rain develop
Largely dry start apart from local drizzle. Pulses of rain moving up from the south, some heavier bursts, greatest risk toward west coast, then more widely in afternoon, but hit and miss locally. Chance of very localised hail and thunder. Wet underfoot, streams remaining fast-flowing, some flooding.
Cloud on the hills?
Extensive, lowest bases in the west.
Extensive hill fog likely. Lowest and most widespread cloud on fells nearest the west coast. Local breaks inland, perhaps more substantial for a time north of A5.
Chance of cloud free summits?
10% near west coast, 40% north of A5.
Sunshine and air clarity?
Mostly overcast. Visibility rather hazy and becoming widely poor in rain and drizzle.
How Cold? (at 900m)
9 or 10C, fairly humid.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 7th November 2025
Last updated
Wed 5th Nov 25 at
4:30PM
How windy? (On the summits)
Southerly 20-30mph. Trending higher later afternoon, reaching up to 40mph for several hours.
Effect of the wind on you?
Fairly small at times, then walking becoming impeded, strenuous-to-arduous conditions by dusk.
How Wet?
Spots of patchy rain
Patchy drizzly rain comes and goes on southern slopes, particularly towards the Lleyn peninsula. Around dusk, patches will merge into a broader area of rain.
Cloud on the hills?
Mostly high tops and southern slopes
Cloud fairly extensive over the high summits most of the day. Banks of cloud forming down on medium southern slopes, higher bases to the north. Higher breaks will occur, best of clear tops around Carneddau.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Glimpses of sunshine, best on northern slopes with some extended periods. Excellent visibility.
How Cold? (at 900m)
7 or 8C. May be up to 9C on northern slopes at dawn.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 8th November 2025
Last updated
Wed 5th Nov 25 at
4:30PM
How windy? (On the summits)
South trending southwesterly, 20 to 30mph, speed may vary during day, at times gusty 35mph around higher tops.
Effect of the wind on you?
Starting to affect comfortable walking and balance in places on exposed higher terrain. Marked wind chill.
How Wet?
Drizzle or local showery rain
Drizzly rain on and off, some showery rain occasionally on hills toward Cardigan Bay. More often dry toward Carneddau.
Cloud on the hills?
Fairly extensive, local breaks north
Varied cloud banks in the morning, some patchy mist lower down, fairly extensive above 600m, rising a little with time away from rain. Mostly above 800m north of the A5, here some breaks forming at times.
Chance of cloud free summits?
20%, to 40% Carneddau
Sunshine and air clarity?
Largely cloudy, glimpses of sun mostly Ogwen valley northward. Varied mist in morning, and reduced in rain, locally good below cloud in north.
How Cold? (at 900m)
5 or 6C. Feeling below freezing if exposed to stronger sustained wind on high tops.
Freezing Level
Above the summits
Planning Outlook
Staying mild with low cloud, drizzle and rain at times through into next week. Areas northeast of major hill groups seeing least rain and highest cloud breaks. Southerly winds of varied strengths, sometimes more blustery, approaching gale-force in exposed western areas. Some drier areas into the weekend, then a risk of heavier rain returning from the west, soonest into Wales and southwest Scotland on Sunday. Further into next week, easterly winds are likely to develop for Scotland, bringing drier weather to the west, and potentially much colder with time. England & Wales may remain frequently wet under slow-moving low pressure.