Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
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
Friday 15th May 2026
Last updated
Thu 14th May 26 at
4:15PM
Summary for all mountain areas
Remaining cold, near to freezing all day on higher tops. Strongest northwesterly winds in the morning and toward eastern Scotland giving significant chill factor. A scattering of mostly brief showers with snow and hail, less intense than recent days. Cloud lifting above many summits, occasional sun.
Headline for Eryri / Snowdonia National Park
Cold and breezy. Brief showers, snow on high tops, hail.
How windy? (On the summits)
Northwesterly 25mph, at times 30mph over higher tops, easing a little in afternoon.
Effect of the wind on you?
Starting to impede walking at times on high terrain, mainly in the morning when the wind chill factor will be most pronounced.
How Wet?
A few showers, snow tops; transferring inland.
Scattered showers most common over north-facing coastal hills early in day, briefly falling as snow on high tops, some hail; tending to push inland and become fewer as the day goes on.
Cloud on the hills?
Varying, then rising to clear tops
Frequent patches or banks of cloud will cover higher tops, especially in Snowdon range in the morning. Bases tending to rise to increasingly clear most or all tops.
Chance of cloud free summits?
50% rising to 80%
Sunshine and air clarity?
Patchy sun, best early morning inland, then improving near west coast afternoon. Visibility very good, briefly lowering in showers.
How Cold? (at 900m)
1 or 2C. Feeling near -10C directly in wind.
Freezing Level
Around 1000m in morning, rising just above tops afternoon.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 16th May 2026
Last updated
Thu 14th May 26 at
4:15PM
How windy? (On the summits)
West or southwesterly 15mph, increasing gradually to 20mph, later afternoon 25mph.
Effect of the wind on you?
Mostly small, but starting to feeling more noticeably breezy with time.
How Wet?
Rain develops
One or two brief showers develop, otherwise largely dry early in day. Patchy rain and drizzle moving in from west, becoming more persistent western areas afternoon, extending further inland.
Cloud on the hills?
Lowering in rain
Patchy cloud banks form on some slopes in morning, mainly western areas, some hills clearer for a time. As rain develops, cloud fills in with time over higher slopes, base lowering soonest west.
Chance of cloud free summits?
70% dropping to 30% afternoon
Sunshine and air clarity?
Any early weak sun gives way to overcast skies. Visibility starts very good, reducing as rain develops, poorer over hills afternoon.
How Cold? (at 900m)
1C rising to 4C afternoon.
Freezing Level
Close to freezing on higher tops above 900m, plus frost inland valleys at dawn. Rising further above freezing to tops.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 17th May 2026
Last updated
Thu 14th May 26 at
4:15PM
How windy? (On the summits)
West turning southwesterly increasing from 15mph to 25mph during the day, risk over 30mph later.
Effect of the wind on you?
Starting small, but becoming more blustery, may start to affect ease of walking on exposed terrain with noticeable chill.
How Wet?
Showery for a time, clearing from west
A little rain toward west coast early morning, odd showers then develop inland during morning, brief heavier bursts, chance of thunder, but tending to move away eastward during afternoon. Showers return into night from west.
Cloud on the hills?
Morning patches, largely clearing
Banks of cloud around higher slopes mostly in west in morning. Lifting to upper slopes, but briefly lowering around showers, then increasingly clearing afternoon.
Chance of cloud free summits?
40% rising to 80%
Sunshine and air clarity?
Largely cloudy with occasional sun, then becoming sunnier near to coast later afternoon onward. Visibility very good, but reduced in showers.
How Cold? (at 900m)
3 or 4C. Feeling nearer -5C as wind increases.
Freezing Level
Above the summits.
Planning Outlook
A shift toward west-southwesterly over the weekend brings a gradual rise of temperature. A mixed weather story with some rain and lowering cloud moving in from the west into Saturday afternoon. By Sunday and Monday, some showery rain, passing eastwards during the daytimes, generally improving afternoons in western areas. Risk by later Monday of rain moving into Wales from the southwest. Damp south-southwesterlies then prevail for a few days next week, with rain at times Tuesday and Wednesday, most on western hills, particularly Scotland. A drier and warmer theme later in the week as higher pressure builds.