Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
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.
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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
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.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 17th October 2026
Last updated
Fri 16th Oct 26 at
4:00PM
Summary for all mountain areas
Light frost and patchy mist to start, soon thawing and most hill-cloud dissipating for fairly widespread chilly sunshine. A few early light showers affect north Wales and east Pennines, afternoon high cloud in England. Far northwest Scotland sees more hill cloud with a few sleet/snow showers.
Headline for Eryri / Snowdonia National Park
Light showers just at dawn, then chilly and mostly sunny
How windy? (On the summits)
Northeasterly 10-15mph, may occasionally gust stronger over highest tops.
Effect of the wind on you?
Small.
How Wet?
Soon dry
A little spotty light rain/sleet may drift into northern Snowdonia NP just around dawn, otherwise dry.
Cloud on the hills?
Mostly just northern high tops
Patchy banks at varied heights in the morning, some mist in sheltered valleys. May be more extensive on high terrain near and north of the Ogwen valley to start, but cloud will lift and tend to break up from sunrise, to just passing banks over Snowdon and high Carneddau summits. Ultimately becoming substantially clear afternoon.
Chance of cloud free summits?
40%, gradually rising to reach 80%
Sunshine and air clarity?
Mostly sunny, a little patchy high cloud drifting in from the east, more cloudy northernmost areas during early hours. Very good visibility.
How Cold? (at 900m)
3C, may rise a degree south and west of high tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 18th October 2026
Last updated
Fri 16th Oct 26 at
4:00PM
How windy? (On the summits)
Northeasterly 10-15mph, tending to strengthen somewhat and quite gusty, to 20-25mph evening into night.
Effect of the wind on you?
Mostly small, though some blustery moments increasingly on high tops.
How Wet?
Rain unlikely
Small risk a little showery rain drifting into east Wales with time, but any falls light in nature and western hills likely entirely dry.
Cloud on the hills?
Little or none
A little light mist in sheltered valleys at dawn will soon lift and break up for largely cloud-free hills. Chance of a little ragged cloud drifting around high terrain later but may stay entirely clear.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Mostly sunny, a little high cloud may form. Very good visibility, though some haze to start.
How Cold? (at 900m)
3C, may rise a degree.
Freezing Level
Just above highest summits, also patchy frosts in sheltered valleys at dawn; soon thawing.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 19th October 2026
Last updated
Fri 16th Oct 26 at
4:00PM
How windy? (On the summits)
Easterly 25 to 30mph, some stronger gusty spots may reach 40mph around high passes and summits.
Effect of the wind on you?
Blustery, in places more notable buffeting gusts and considerable wind chill in exposure on the mountains.
How Wet?
Rain and drizzle
Light rain and drizzle drifting across the region from the east, may persist over a few hours especially more eastern hills, where may remain generally damp all day.
Cloud on the hills?
Often covering higher tops
Covering most higher slopes above 600-700m in the morning, some lower banks in east, whilst some breaks higher up near west coast. Base may tend to slowly rise and break a little higher widely with time.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Generally cloudy and dull, reduced visibility where damp, may improve a little.
How Cold? (at 900m)
5C, little change all day. Feeling like -5C in the wind.
Freezing Level
Above the summits.
Planning Outlook
A window of more settled weather continues into Sunday as high pressure extends over Britain. Clear night skies allow for chilly mornings with ground frosts, some valley mist particularly in Scotland. The new week starts with some rain and wind in Wales and south Pennines, more settled to the north but with strengthening wind and building cloud as well. A general unsettling trend indicated through next week as winds return to Atlantic southwesterlies. A few windows of brighter weather in eastern areas, but a rising risk of strong wind and heavy rain into late week and next weekend.