Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 12th May 2026
Last updated
Mon 11th May 26 at
4:30PM
Summary for all mountain areas
Scotland: Feeling cold in the gusty westerly winds. Early band of rain will clear to brighter skies and scattered showers. Showers more frequent later in day with risk of hail and thunder. England and Wales: Chilly with gusty westerly winds. Showery rain for a time, then brighter with a few passing showers.
Headline for Eryri / Snowdonia National Park
Cold westerly winds. Rain for a time. Brightening up afternoon, with showers.
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, around the middle of the day. Later in afternoon, brighter with 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
Mon 11th May 26 at
4:30PM
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.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 14th May 2026
Last updated
Mon 11th May 26 at
4:30PM
How windy? (On the summits)
North-westerly 15 to 25mph, but perhaps up to 30mph for western coastal hills.
Effect of the wind on you?
Feeling cold for mid May, with considerable chill in the north-westerly wind.
How Wet?
Showers developing widely, some hail.
Showers developing widely through day, some heavy with hail. May merge into longer spell of rain, or above 900m snow, later in the day.
Cloud on the hills?
Fairly extensive across the tops.
In the north-westerly wind, whilst the cloud bases will vary, they will frequently cover higher terrain above 700-900m, patches to 500-600m at times.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Sun limited mostly to well inland early in the day, then as fleeting glimpses between the showers. Visibility very good, but poor in showers.
How Cold? (at 900m)
1C
Freezing Level
1000m
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.