Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Hazy, some fog banks
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Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of cloud.
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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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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Hazy, some fog banks
Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of cloud.
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 10th March 2026
Last updated
Mon 9th Mar 26 at
4:00PM
Summary for all mountain areas
Patchy rain and lowest cloud over southwest-facing hill groups. Cloud fairly extensive on hills, but higher bases and some breaks northeastwards. Gale-force winds on high terrain, speeds strengthening during day, later becoming widely severe upland gales; heavier rain arrives from west by evening.
Headline for Eryri / Snowdonia National Park
Windy, increasingly gales. Varied low cloud, a little rain.
How windy? (On the summits)
South to on higher slopes southwesterly; increasing through day from 25-30mph to 40 to 50mph, strongest Snowdon range afternoon, gusts reaching 60mph high tops toward dusk.
Effect of the wind on you?
Walking and balance increasingly affected on exposed higher slopes, deteriorating to more arduous or difficult conditions with significant wind chill later in day.
How Wet?
Patchy rain, wetter by evening
A little rain now and again western hills, an isolated brief burst of rain. Rain more widely soon after dark, heaviest in west into evening, lasting a few hours.
Cloud on the hills?
Will come and go: clearing for a few hours before lowering afternoon
Morning: cloud base widely rising to or above 750-900m, more persistent near Llyn peninsula. Afternoon: Will deteriorate from west as cloud forms widely above 600 to 750m, but later 300m Llyn peninsula to Snowdon.
Chance of cloud free summits?
30%, but 70% for a few hours middle of day.
Sunshine and air clarity?
Glimpses of sun some lower slopes - though more extensive east Wales and north of the Carneddau for a few hours. Very good visibility though a haze westernmost areas, poorer later.
How Cold? (at 900m)
3C - only slow drop in temperature higher up. Feeling like -6C to later nearer -10C directly in the wind.
Freezing Level
Above the summits. Then lowering well into the night ahead toward 800m.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 11th March 2026
Last updated
Mon 9th Mar 26 at
4:00PM
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.
Effect of the wind on you?
Expect considerable wind chill and walking to be arduous particularly at first.
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 below 400 to 600m (lowest 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. Will feel like -10C directly in the wind.
Freezing Level
900m slowly rising to just above highest summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 12th March 2026
Last updated
Mon 9th Mar 26 at
4:00PM
How windy? (On the summits)
Southwesterly 50 to 60mph, risk gusts over 70mph at least in the morning.
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 hours in the morning may be on and off, patchier eastern hills. Uncertain timing, but risk with time of prolonged heavier rain developing, late in day snow high tops.
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.
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)
4C, then late in day likely to drop to -1C. Wind chill feeling like -8 to -12C.
Freezing Level
Above the summits possibly most of daylight, but later dropping toward 800m, or lower into night.
Planning Outlook
Generally unsettled this week and through the upcoming weekend 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 the week with widely lowering freezing level Thursday into 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.