Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra 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.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 2nd June 2026
Last updated
Mon 1st Jun 26 at
4:18PM
Summary for all mountain areas
Heavy showery bursts of rain with thunder and lightning, moving eastwards over England, Wales and south-central Scotland. A zone of more persistent rain affects the Cairngorms, heavy bursts mixed in. Drier toward west coast of Scotland, improving in western England & Wales in afternoon as the breeze freshens.
Headline for Eryri / Snowdonia National Park
Breezy, showery bursts clear eastward, chance thunder.
How windy? (On the summits)
Westerly 20 to 25mph, freshening during day, at times 30mph afternoon.
Effect of the wind on you?
Noticeable breeze, at times starting to affect balance on exposed ridges. Feeling rather cool in exposure on tops.
How Wet?
Heavy thundery showers clear
Showery rain on and off from dawn, some heavier bursts forming and passing eastwards morning into middle of day, risk isolated thunder. Fading for a time in west afternoon, some light showers later. Wet underfoot and fast-flowing streams after previous rain.
Cloud on the hills?
Lifting toward tops, breaks form
Cloud banks covering higher slopes most widely in west in morning, becoming confined above 800m and higher breaks into middle of day onward. Patches likely return over western tops into evening.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Glimpses of sun, becoming sunnier near west coast for a time afternoon. Visibility very good, reduced in showers.
How Cold? (at 900m)
8 or 9C. Feeling close to 0C if exposed to wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 3rd June 2026
Last updated
Mon 1st Jun 26 at
4:18PM
How windy? (On the summits)
South-southwesterly 40 to 50mph, up to 60mph for periods at least in gusts on higher tops.
Effect of the wind on you?
Strenuous to often arduous walking in exposure, powerful gusts could knock you over. Considerable wind chill.
How Wet?
Heavy rain, drizzle, then showery
Rain extends in from west early in day, soon fairly persistent, heavy for a time especially west, drizzly even when heavier rain fades, drier moments northeast. Showery bursts afternoon-evening. Chance isolated thunder.
Cloud on the hills?
Extensive
Blanket low cloud across the hills, from lower slopes up near the coast, rarely above 500-600m inland, highest bases toward northeast of Ogwen valley. Base rising afternoon, but rarely above tops, ragged patches lower again in showers.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Largely cloudy, dull, murky toward west in rain; hazy at best. Better visibility eastern hills below cloud, more widely in drier moments afternoon.
How Cold? (at 900m)
7C, slight rise mainly in east. Wind chill feeling like -5 to -8C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 4th June 2026
Last updated
Mon 1st Jun 26 at
4:18PM
How windy? (On the summits)
Southwest soon westerly, 30 to 40mph, speeds may vary, stronger gusts occasionally.
Effect of the wind on you?
Strenuous walking conditions, frequent buffeting affecting balance on exposed high terrain. Marked wind chill.
How Wet?
Bursts of rain on and off, risk lightning
Showery rain throughout the day, some heavy bursts increasingly extend eastwards, risk of thunder. Coastal areas may become drier for a time afternoon, but further showery rain likely later.
Cloud on the hills?
Fairly extensive, varied
Covering higher slopes frequently, more persistently in western areas, ragged patches to lower slopes during and after rain; tending to lift higher afternoon with some breaks.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Rare brief sun, may break through in west for a time afternoon. Visibility occasionally good below cloud, but reduced in rain, at times poor.
How Cold? (at 900m)
6 or 7C, then tending to drop into night. Feeling near -5C directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
An unsettled spell this week and next, as low pressure over the north Atlantic and west-southwesterly winds dominate. Periods of rain mixed with showery days widely - the most constant rain over western mountains with low cloud often shrouding the hills. Wind speed will vary, but up to gale-force for periods over the hills this week, then typically less windy next week. Temperatures near average, cooler at times. Briefly higher pressure by Saturday with fewer showers, but a further area of rain likely returns from the west during Sunday. Mid June onward shows signs of drier and warmer weather as higher pressure then expands northward with time.