Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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.
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.
Clear
Excellent or superb visibility, no navigation issues.
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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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.
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.
Clear
Excellent or superb visibility, no navigation issues.
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
Sunday 11th October 2026
Last updated
Sat 10th Oct 26 at
4:30PM
Summary for all mountain areas
A fine day overall with light winds, sunshine and just patchy cloud around some mountain slopes. Isolated brief showers around coastal fringes at first will fade. Southerly winds tend to strengthen later in the day in western areas. Some patchy rain reaches southwest Wales.
Headline for Eryri / Snowdonia National Park
Largely dry, a lull in wind, sun and high cloud.
How windy? (On the summits)
West-northwesterly 20mph around dawn, easing in morning 10-15mph. By midday into afternoon, turning southerly, rising from west to 20-25mph, by dusk 30mph far west, reaching 40-45mph late evening into night.
Effect of the wind on you?
Mostly small until later in day, but more blustery conditions toward sunset, worsening after dark.
How Wet?
Largely dry until late
Brief scattered light showers early morning, west coast hills, fading to be largely dry. By evening, odd spots develop, then rain pushes in from west onward into night.
Cloud on the hills?
Clearing tops
Patchy cloud drifting over some higher slopes mainly in western areas in the morning, but likely all dispersing or lifting above tops.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Patchwork of cloud and sun; a veil of high cloud tending to thicken. Visibility excellent.
How Cold? (at 900m)
4C rising to 6C afternoon, lifting further after dark toward 10C. Feeling near/below freezing if exposed to stronger breeze.
Freezing Level
Above the summits. Slight frost inland valleys at dawn.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 12th October 2026
Last updated
Sat 10th Oct 26 at
4:30PM
How windy? (On the summits)
South-southwesterly 20 to 30mph, then late in day likely to increase, to 50mph most likely after dark.
Effect of the wind on you?
Fairly small, but blustery around higher exposed terrain, likely to deteriorate onward into evening-night.
How Wet?
Generally damp, some steady rain
Rain and drizzle most persistent over west coastal hills and Llyn peninsula, some steady or heavier rain more widely early and late. Patchier smaller amounts toward north and east, sometimes easing off.
Cloud on the hills?
Extensive, local breaks north
Shrouding most hills all day, from lower elevations toward west coast, rarely above 400-500m inland. Higher bases north from Ogwen valley, occasional breaks above 600m. Perhaps an improvement afternoon.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast, dull or murky. Local brighter moments north and during afternoon.
How Cold? (at 900m)
10 or 11C, little change day and night. Feeling near to freezing if in stronger wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 13th October 2026
Last updated
Sat 10th Oct 26 at
4:30PM
How windy? (On the summits)
West-southwesterly, overnight gales ease, perhaps a brief drop to 25mph, but mostly in the range 30 to 40mph.
Effect of the wind on you?
Generally blustery over the mountains, more challenging at times on exposed high terrain; increasingly marked wind chill.
How Wet?
Early rain then showers
Heavy rain around dawn clears away eastwards in morning, leaving a brief drier window, but showers soon follow from the west, some heavier ones near to west coast, but these may later tend to ease.
Cloud on the hills?
Often capping high western tops
Varied cloud banks from dawn, but lifting toward upper slopes and clearing some high tops for a time inland, but patches often cap higher tops in Snowdon group and near coast, lowering again in showers.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Some sun breaking through occasionally in morning, often cloudy west. Visibility good as rain clears, but some haze in west, reduced further in showers.
How Cold? (at 900m)
Mild 12C overnight but dropping to 8C by dawn, lowering further during day to 6C. Feeling later like -6C in stronger wind.
Freezing Level
Above the summits.
Planning Outlook
Damp and mild southwesterly air moves across the country into Monday, winds strengthen again later to widely gale-force over the hills, heavier rain sweeps eastward overnight and into early Tuesday, followed by showers and a drop of temperature. Very unsettled west-southwesterlies continue into midweek - sustained mountain gales, possibly stormy at times and spells of heavy rain for all areas. A changeable westerly theme likely continues beyond mid-month - occasional windows of drier weather, but more often windy with rain or showers coming in from the Atlantic, sometimes cold enough to fall as snow on Scottish high tops.