Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
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.
Click an icon for more information or click here for a key to all icons.
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
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
Wednesday 11th March 2026
Last updated
Tue 10th Mar 26 at
4:00PM
Summary for all mountain areas
Cold strong westerly winds, gales over Scottish mountains and more widely early in day, significant chill factor over mountains. Showery snow and hail most frequent W & NW Highlands, more scattered elsewhere. Cloud base varying, occasional sun.
Headline for Eryri / Snowdonia National Park
Windy, gales at first. Showers with hail, snow tops.
How windy? (On the summits)
Westerly up to 45mph post dawn. Will drop to typically 30 or on higher tops Snowdon range 35mph by midday. Increasing again into night, reaching 70mph, stronger gusts.
Effect of the wind on you?
Expect considerable wind chill and walking to be arduous particularly at first. Deteriorating again to severe gales onward into night.
How Wet?
Hail and snow showers
Occasional hail and above 750m snow showers, mostly morning.
Cloud on the hills?
Extensively covering higher areas
In precipitation, cloud temporarily forming to 400 to 600m lowest in morning westernmost slopes. Otherwise, by midday frequently between 750 and 1000m.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Bursts of sunshine, particularly afternoon. Visibility mostly very good or excellent.
How Cold? (at 900m)
0C rising slowly toward 2C, then slightly higher into night. Will feel like -10C directly in the wind.
Freezing Level
900m slowly rising to just above highest summits, then lifting further into night.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 12th March 2026
Last updated
Tue 10th Mar 26 at
4:00PM
How windy? (On the summits)
Southwesterly 50 to 60mph, risk gusts over 70mph with time.
Effect of the wind on you?
Difficult conditions over the mountains, any mobility challenging in exposure higher up. Significant wind chill.
How Wet?
Rain likely developing heavier
Frequent or persistent rain, but for a few morning hours may be on and off, patchier eastern hills. With time, prolonged heavier rain developing, greatest risk western slopes, snow to tops after dark.
Cloud on the hills?
Fairly extensive, lowest west
Covering western hills most or all day above 400-600m, at times lower nearest west coast. Some higher bases north of Ogwen valley, also furthest east, but more widely low when rain arrives later.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast and dull most of day, especially in west, local brighter moments east. Rather hazy, poorer visibility in rain.
How Cold? (at 900m)
5 or 6C, though starting several degrees cooler. Dropping towards -1C overnight. Wind chill feeling like -8 to -12C.
Freezing Level
Above the summits possibly most of daylight, lowering to touch the summits late in the day, towards 600m overnight.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 13th March 2026
Last updated
Tue 10th Mar 26 at
4:00PM
How windy? (On the summits)
West to southwesterly 35 to 45mph, likely strongest in the morning, squally gusts around showers.
Effect of the wind on you?
Challenging walking conditions over exposed higher terrain, considerable buffeting and significant wind chill.
How Wet?
Hail and snow showers, risk thunder
Showers with hail sometimes frequent on more western hills; also snow falling to 300m in morning, then mostly confined above 500-600m with time. Risk isolated lightning.
Cloud on the hills?
Varying over the tops
Cloud base frequently changing: at times shafts of cloud to 600m or lower near west coast, often capping mountains above 800m, but some breaks to the higher tops, more often Bala and Berwyn groups.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief bursts of sun, most often in east. Visibility varying between intermittently very good, and at least briefly appalling when in snow/hail and cloud.
How Cold? (at 900m)
-3C rising to -1C afternoon. Feeling like -12 to -15C directly in the wind.
Freezing Level
400 to 600m at first, rising toward 800m by early afternoon.
Planning Outlook
Generally unsettled onward into the upcoming weekend and start of next week as low pressure systems pass near and north of Britain - strong west or southwesterly winds prevail, often gale-force to at times storm-force over the mountains. Some fluctuation of temperature and freezing level, but mostly below freezing over Scottish mountains, at times snow falling to lower elevations. Colder for all by the end of this week with widely lowering freezing level by Friday. Frequent precipitation most western mountains, accumulations of snow across the mountains, most substantial in western Scotland from Glencoe northwards. Quieter weather patterns indicated beyond mid-month as higher pressure builds.