Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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.
Click an icon for more information or click here for a key to all icons.
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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
Thursday 11th June 2026
Last updated
Wed 10th Jun 26 at
3:56PM
Summary for all mountain areas
Persistent rain onto western hills from dawn, soon spreading widely. Murky with heavy falls, extended heavy falls west Wales. Very windy England and Wales, gale-force gusts, strongest Wales. Rain and strong wind slower to reach north and east Scotland though blanket low cloud fills in.
Headline for Eryri / Snowdonia National Park
Low cloud, persistent heavy rain; very windy, gales at times
How windy? (On the summits)
Southwesterly 25-30mph just at dawn, soon strengthening to 40-45mph by midday with powerful gusts approaching 55mph+ for several hours. Shifting westerly with afternoon speeds near 35-45mph, staying very gusty.
Effect of the wind on you?
Arduous walking conditions in exposure on high terrain all day with frequent buffeting; difficult conditions for several midday hours with wind knocking you off balance. Considerable wind chill.
How Wet?
Near-constant rain, extended heavy falls west
Constant rain arriving from before dawn, some steadier heavier falls for periods through the morning. May break up a little in afternoon in north and eastern areas, but remaining persistent in the west with continued heavy falls.
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?
Practically nil
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 by evening and staying elevated into nighttime. Feeling like -3 to -6C directly in wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 12th June 2026
Last updated
Wed 10th Jun 26 at
3:56PM
How windy? (On the summits)
Westerly 25 to 35mph, strongest Snowdon/Yr Wyddfa range, at times 40mph.
Effect of the wind on you?
Strenuous walking where exposed, buffeting gusts affecting balance on ridges. Feeling cool despite fairly mild air.
How Wet?
Drizzly rain west
Damp over many western hills with drizzle often in the air, but may amount to little in total rainfall - some steadier light rain possible at times. Eastern hills drier, and perhaps more widely dry late in the day.
Cloud on the hills?
Extensive, lowest west
Persistent across the hills, foggy from lower elevations upward toward the west coast, cloud base rarely above 500m most western areas. Higher bases northeast of Ogwen and near Bala, but often shrouded above 600m.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Largely cloudy, glimpses of sun mostly east Wales. Poor visibility, misty and hazy in west, locally better visibility below cloud in east.
How Cold? (at 900m)
9 or 10C, little change, but notably cooling overnight. Feeling like 0 to -3C where exposed to wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 13th June 2026
Last updated
Wed 10th Jun 26 at
3:56PM
How windy? (On the summits)
Northwesterly 25-30mph at dawn, easing to 15-25mph most of the day, lightest wind later.
Effect of the wind on you?
Walking may be strenuous with buffeting gusts and wind chill early, easing to fairly small effects.
How Wet?
Minimal patchy rain and drizzle
Damp with fine drizzle over the high tops with a few patches of rain drifting from the northwest from time to time. East Wales hills likely substantially dry.
Cloud on the hills?
Lifting to high terrain
Fairly extensive above 600-700m in the morning. A general lifting and breaking trend with time, though banks cling to terrain above 800-900m, and some variable lower banks on western slopes too.
Chance of cloud free summits?
50%
Sunshine and air clarity?
A few glimpses of weak sunshine, most often cloudy to the west. Good visibility.
How Cold? (at 900m)
6C rising to 10C. Feeling below freezing in early direct wind.
Freezing Level
Above the summits.
Planning Outlook
Damp westerly breezes on Friday will cloak most mountains in cloud and some drizzle, better conditions eastwards. Cool and strong westerlies persist in Scotland on Saturday, then warmer with lighter winds by Sunday. Some patchy rain remaining in west and northwest Scotland over the weekend. Pressure tends to rise from the south this weekend, bringing warmer air and drier conditions to England & Wales, although west coast mountains may hold onto cloud. Into next week, a mixed southwesterly pattern remains, windy at times with periods of rain, drizzle and low cloud most persistent in the west. Warmest in England and Wales, but cooler westerly air likely returns at times mid-late week. Higher pressure then shows more signs of expanding over the country by late next week bringing improving conditions.