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.
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.
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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.
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 8th March 2026
Last updated
Sat 7th Mar 26 at
1:08PM
Summary for all mountain areas
A blanket of low cloud and haze (particularly Pennines) over England, Wales and SW Scotland will spread to the Borders and S Highlands later in day - albeit cloud breaks in places. The Scottish highlands mostly fine albeit windy in the NW with chance of a little rain.
Headline for Eryri / Snowdonia National Park
Extensive fog, a little rain. Light wind.
How windy? (On the summits)
Southerly 15mph, but possibly 20mph western mountains.
Effect of the wind on you?
Small
How Wet?
Patches fine drizzle at times. Heavier rain briefly.
Fine drizzle here and there, and almost anywhere chance of a burst of rain.
Cloud on the hills?
Will cover western tops
Extensive fog, the cloud base typically 400 to 600m by midday as cloud base begins to rise. Possibly breaking to clear some high tops afternoon - though uncertain.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Widely dull and hazy although the sun will come through in places.
How Cold? (at 900m)
5C
Freezing Level
Above the summits, but slight frost some inland valleys at dawn.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 9th March 2026
Last updated
Sat 7th Mar 26 at
1:08PM
How windy? (On the summits)
South to southwesterly 15mph
Effect of the wind on you?
Small
How Wet?
Patchy rain; very little in total
Bursts, probably brief, of showery rain now and again. Some places may well stay dry, and total rainfall everywhere small.
Cloud on the hills?
Very extensive - although cloud base rising, perhaps breaking.
Very likely blanket of fog from lower slopes up from dawn - though possibly breaks to some higher slopes. Cloud base will rise from late morning, and in afternoon, most cloud will be above 600 to 800m, and may substantially clear.
Chance of cloud free summits?
10% rising to 40%
Sunshine and air clarity?
Widely dull and misty or murky morning. The cloud slowly breaking in places, perhaps substantially in some areas (most likely N Pennines) afternoon and visibility probably improving to be very good.
How Cold? (at 900m)
4C
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 10th March 2026
Last updated
Sat 7th Mar 26 at
1:08PM
How windy? (On the summits)
South to on higher slopes southwesterly; increasing with height to 25 to 35mph, but perhaps 40mph highest tops.
Effect of the wind on you?
Notable ind chill and balance affected by the wind on exposed higher slopes.
How Wet?
Rain now and again
Rain occasionally - little in total.
Cloud on the hills?
Persistent most areas; highest cloud base east and far north of Wales
Generally persistent cloud above 450 to 600m. But may well be extensive at or below 300m Lleyn peninsula to Snowdon. Highest cloud base easternmost hills and perhaps Carneddau where mostly 750 to 900m.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Glimpses of sun some lower slopes - though more extensive east and north off the Carneddau. Generally hazy west Wales; otherwise very good visibility.
How Cold? (at 900m)
3C - only slow drop in temperature higher up. Will feel as cold as minus 6C directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
Increasingly wet and windy, particularly western mountains through next week. From Wednesday, bouts of upland severe or storm force winds will reach the Sottish Highlands and the gales periodically affecting other mountain areas later in the week. Freeze thaw cycles will occur on higher areas south from S Scotland whilst the Scottish Highlands experience infrequent thaw, with fresh snow sometimes reaching lower slopes, whilst extensive higher up.