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.
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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Tuesday 9th June 2026
Last updated
Mon 8th Jun 26 at
4:00PM
Summary for all mountain areas
Generally showery, heavy bursts with risk of thunder, particularly more eastern areas afternoon into evening. Strongest west to southwesterly winds for England and Wales. Rather chilly, notable wind chill in exposure on hills. Cloud varying over the tops.
Headline for Eryri / Snowdonia National Park
Cool and windy; showery rain, some heavy.
How windy? (On the summits)
Southwest trending westerly 25 to 35mph, but reaching 40mph at times across the tops morning up to middle of day, gusty around showers, moderating a little during afternoon onward to around 25mph.
Effect of the wind on you?
Be prepared for very blustery conditions and a cold feel for the time of the year. More arduous walking over tops for periods until early afternoon.
How Wet?
Frequent showers, chance of lightning.
Frequent precipitation through the day, in the form of shower after shower feeding in across the hills, locally banding together passing eastwards, but some spots drier. Some hail mixed in with a chance of thunder.
Cloud on the hills?
Frequently covering upper slopes
Fairly extensive above 500-700m at first, lowest toward west coast, but bases rising to become mostly around 700-900m afternoon, some breaks to tops, mainly well inland. Ragged patches in showers.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Often cloudy, patchy sun best in the east, sometimes breaking through near west coast afternoon. Visibility poor for periods due to rain, intermittently very good.
How Cold? (at 900m)
3C lifting to 5C
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 10th June 2026
Last updated
Mon 8th Jun 26 at
4:00PM
How windy? (On the summits)
Westerly 20 to 25mph, at times 30mph higher tops.
Effect of the wind on you?
Marked wind chill where exposed to the strongest breeze. Starting to affect ease of walking on some high tops and ridges.
How Wet?
Showers move east, fade with time
Showers initially western hills will develop more widely during morning, odd heavy bursts, chance of thunder inland. Heavier showers move away eastward in afternoon, leaving odd lighter showers later in day.
Cloud on the hills?
Often covering tops, rising
Varying, but tops often covered through the day, especially towards west coast in the morning. Breaks to tops best in afternoon away from showers.
Chance of cloud free summits?
30% rising to 60% afternoon
Sunshine and air clarity?
Variable cloud and patchy sun, best sun early in day well inland, then sunnier later in day near coasts. Visibility mostly good, but poor in showers.
How Cold? (at 900m)
3C lifting to 5C. Feeling like -5C directly in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 11th June 2026
Last updated
Mon 8th Jun 26 at
4:00PM
How windy? (On the summits)
Southwest turning westerly 35 to 45mph, at times over 50mph higher mountains.
Effect of the wind on you?
Challenging walking conditions in exposure on high terrain, frequent buffeting. Considerable wind chill.
How Wet?
Persistent rain
Rain arriving from before dawn, some steadier heavier falls for periods through the morning. May break up a little in afternoon, but still often raining.
Cloud on the hills?
Extensive low cloud
Blanket low cloud across the hills, to lower slopes west coast areas, highest bases northeast of Ogwen valley, but rarely above 600m.
Chance of cloud free summits?
Below 10%
Sunshine and air clarity?
Overcast and dull, murky toward west. Poor visibility much of day in rain.
How Cold? (at 900m)
6C rising to 10C. Feeling like -3 to -6C directly in wind.
Freezing Level
Above the summits.
Planning Outlook
A changeable pattern continues this week with west-southwesterly winds prevailing, bringing a mix of rain and showers in from the Atlantic. A period of more persistent rain on Thursday. Pressure tends to rise from the south toward the weekend, bringing warmer air and drier conditions particularly England & Wales, although western mountains will remain often cloudy, some patchy rain remaining in west and northwest Scotland into the weekend. Into next week, a mixed southwesterly pattern remains possible, with some rain, drizzle and low cloud mostly in the west, but with higher pressure trying to expand northward, the week looks generally drier and warmer than the present time.