Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Monday 11th May 2026
Last updated
Sun 10th May 26 at
4:28PM
Summary for all mountain areas
Cold northerly breezes, but a bright day with broken cloud lifting above the mountains and some sun. Scattered showers with snow flurries on hills. A band of showers moves south over Wales in the morning. Later in the day, westerly winds increase and cloud thickens in western Scotland with drizzly rain arriving.
Headline for Eryri / Snowdonia National Park
Chilly, breezy with showers at first, clearing hills with some sun.
How windy? (On the summits)
North-northwesterly 25mph early in day, gusts over 30mph for a time on tops, easing a little afternoon to 15-20mph, strongest toward west coast. Increasing west-northwesterly 25-30mph into night.
Effect of the wind on you?
Blustery and distinctly chilly in exposure on higher tops and ridges in the morning. Moderating during the day.
How Wet?
Early showers with snow on tops clearing
Showery rain from dawn into early morning, most frequent near north coast for an hour or two, snow flurries on higher tops. Clearing southwards to leave largely dry conditions, rare light showers inland afternoon.
Cloud on the hills?
Lifting and largely clearing
Some cloud banks drifting over tops mainly in northern areas above 700m early in day. Lifting higher up during morning and breaking above the summits.
Chance of cloud free summits?
60% morning, rising to 90% afternoon.
Sunshine and air clarity?
Patchy sunshine develops. Visibility excellent, reduced early in day in showers.
How Cold? (at 900m)
1C early morning, rising to 3 or 4C afternoon. Feeling like -7C in the wind in morning.
Freezing Level
Close to freezing above 900-1000m early in day, then above the tops afternoon.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 12th May 2026
Last updated
Sun 10th May 26 at
4:28PM
How windy? (On the summits)
Westerly 25 to 40mph, squally gusts around showers.
Effect of the wind on you?
Frequent buffeting across higher mountains, affecting balance on exposed ridges. Considerable wind chill.
How Wet?
Rain for a time, showers
A band of showery rain moving southeast during the day, may be frequent or more persistent rain over an hour or more in west. Later scattered showers.
Cloud on the hills?
Covering tops for a time, clearing
Cloud banks drifting over higher slopes, may persist for a few hours around rain, then lifting higher with increasing breaks afternoon.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Occasional sun. Visibility often very good, but reduced in rain or showers.
How Cold? (at 900m)
2 to 4C. Feeling as cold as -8C directly in the wind on tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 13th May 2026
Last updated
Sun 10th May 26 at
4:28PM
How windy? (On the summits)
West to northwesterly 30 to 45mph, strongest sustained speeds in morning, but may increase again toward dusk.
Effect of the wind on you?
Significant wind chill, very blustery, strenuous walking on high terrain, buffeting gusts making balance challenging.
How Wet?
Showery, hail, snow high tops
Showers all day, most frequent toward coastal areas early morning, but soon widespread, heavy bursts with hail, risk isolated thunder; snow at times falling on tops mostly above 700m.
Cloud on the hills?
Varying over tops
Banks of cloud often covering higher areas in the north and west above 800m in the morning, tending to lift higher with breaks above even the higher tops, but ragged patches to 600m in showers.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Brief bursts of sun and intermittently excellent visibility, but suddenly very poor during showers, appalling if in snow/hail and cloud on tops.
How Cold? (at 900m)
0C rising to 3C. Wind chill feeling like -12 to -15C.
Freezing Level
Around 900m early morning, rising above summits, but lowering briefly near high tops in showers.
Planning Outlook
Notably chilly for mid-May across the hills this week as air from the north-northwest prevails. Frequently near or below freezing over Scottish Munros, and at times dropping to freezing on high tops in England and Wales. Wind speed will vary, but increasing at times to gale force on hills, giving significant chill factor. Broadly showery, heavy bursts with hail and thunder in places, also often falling as snow on higher mountains, at least in Scotland, intermittently elsewhere. Some more persistent precipitation especially northwest Scotland. Also some drier windows - varying locally day-to-day - away from showers cloud will lift above hills and visibility will be very good. Less windy and fewer showers suggested by next weekend into early next week.