Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Clear
Excellent or superb visibility, no navigation issues.
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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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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Clear
Excellent or superb visibility, no navigation issues.
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
Sunday 18th October 2026
Last updated
Sat 17th Oct 26 at
4:00PM
Summary for all mountain areas
A fine but cool day with sunshine and mountains largely free of cloud, fragments on some slopes and early mist on low terrain. Cloud banks drift onto Skye more often. Light winds for much of Scotland, a fresher northeasterly breeze for England and Wales, which brings odd light showers.
Headline for Eryri / Snowdonia National Park
Chilly breeze. Dry most places with sun and largely clear hills.
How windy? (On the summits)
Northeasterly 15mph, tending to strengthen somewhat and quite gusty, to 20-25mph by evening, then 30-35mph and gustier onward into night.
Effect of the wind on you?
Mostly small effect on walking, though feeling chilly on high tops in any breeze, more notably later in day. Worsening conditions into night.
How Wet?
Rain rare if any
An odd light shower possible mainly near to north coast, and perhaps over eastern hills during afternoon, but most of the region stays dry all day.
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. Odd patches may graze tops around Carneddau. Patches may drift onto more eastern tops later in day.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Mostly sunny, patchy cloud toward north coast; high cloud drifts in afternoon. Very good visibility, though some haze to start.
How Cold? (at 900m)
3C, may rise a degree, little change with height early in the day. Feeling like -3C in increasing breeze.
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
Sat 17th 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.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 20th October 2026
Last updated
Sat 17th Oct 26 at
4:00PM
How windy? (On the summits)
Southeasterly 15 to 25mph.
Effect of the wind on you?
Fairly small, some gusty spots may feel more noticeable and rather cool.
How Wet?
Rain and drizzle
Generally damp all day, some steadier light rain, risk heavier falls developing. West coastal areas may see patchier rain.
Cloud on the hills?
Fairly extensive, may be better west
Overcast, dull and misty from many lower slopes upward, particularly eastern hills. Cloud base higher west and northwestward, some breaks above 600-700m, locally may be clearer near coast.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, dull and misty, from many lower slopes upward in east, though local brighter skies toward the west coast.
How Cold? (at 900m)
6C, little change all day. Feeling like 0C in the wind.
Freezing Level
Above the summits.
Planning Outlook
The new week starts with some rain and wind in Wales and south Pennines, staying drier for much of Scotland on Monday, but with strengthening southeasterly wind, cloud increasingly shrouding all hills and becoming widely damp onward into Tuesday, blanket low cloud shrouding hills to some lower elevations. A more unsettled pattern returns widely as the week goes on as winds return to Atlantic southwesterlies. A few windows of brighter weather in eastern areas, but periods of strong wind and heavy rain into late week and next weekend as a series of fronts and low pressure systems sweep in from the southwest, risk of gales becoming severe at times on higher mountain terrain.