Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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.
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.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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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.
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.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 16th November 2026
Last updated
Sun 15th Nov 26 at
3:02PM
Summary for all mountain areas
Cold northerly winds in the morning bring snow and hail showers to northern Scotland and locally north Wales, otherwise generally clear and sunny. Winds drop light all areas through middle of day, then strengthen southeasterly later, gales into night; rain and hill snow moves in from southwest.
Headline for Eryri / Snowdonia National Park
Early snow & hail showers, cloud breaks; snow/rain evening-night.
How windy? (On the summits)
Northwesterly 25mph at dawn, easing to 10mph or less for a few hours. Later afternoon onward, rising southeasterly 20-30mph, rapidly 50-60mph after dark.
Effect of the wind on you?
Small until well into afternoon, but later starting to worsen with marked wind chill. Deteriorating significantly into evening.
How Wet?
Early showers fade; hill snow/rain by evening
Frequent showers from overnight through dawn, snow and hail falling toward lower elevations briefly. Showers fade to be largely dry middle of day-afternoon. After dark, hill snow and rain moves in from south, then turning increasingly all to rain to tops by midnight onward, later turning showery.
Cloud on the hills?
Mostly clearing
Varying cloud capping higher slopes in the morning, mostly northern areas, but lifting and breaking up to leave most hills clear. After dark, as precipitation develops, cloud increasingly enveloping higher terrain.
Chance of cloud free summits?
60% rising to 90%
Sunshine and air clarity?
Patchy sun and cloud at first in north; then sunshine fairly weak due to high cloud, which thickens further later. Visibility excellent.
How Cold? (at 900m)
-2C, later 0C, then +5C into night. As wind increases later, feeling like -10C, or colder after sunset.
Freezing Level
600-700m, then rising a little during afternoon, varying in evening, but eventually lifting above the tops into night.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 17th November 2026
Last updated
Sun 15th Nov 26 at
3:02PM
How windy? (On the summits)
Southwesterly 25 to 35mph, some uncertainty of highest speed, chance of more sustained gales for a few hours.
Effect of the wind on you?
Blustery over high terrain affecting comfortable walking and balance with considerable wind chill. May worsen.
How Wet?
Frequent or persistent heavy rain
Often raining western mountains, heavy bursts sometimes with hail mixed in, chance of isolated thunder. Pulses of rain spreading well inland frequently, but patchier toward east Wales.
Cloud on the hills?
Frequently covering tops
Cloud base varying, but often shrouding higher and western hills above 700m, at times patches to 400m near to west coast. Better breaks higher up from Carneddau to Bala and Berwyn groups.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little if any sun. Visibility at times good where dry, but often poor in rain in west.
How Cold? (at 900m)
4C, little change all day. Feeling like -5C or possibly near -10C if exposed to stronger wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 18th November 2026
Last updated
Sun 15th Nov 26 at
3:02PM
How windy? (On the summits)
Southwesterly 20 to 30mph, possibly stronger speeds particularly mid-Wales.
Effect of the wind on you?
Starting to affect comfortable walking, risk more strenuous on exposed terrain with marked wind chill.
How Wet?
Frequent or persistent bursts of rain
Frequent showery rain most western hills, some more constant falls, heavy bursts with possible hail, chance of thunder. Patchier small amounts east Wales.
Cloud on the hills?
Extensive
Covering higher slopes most of the day above 700m, patches to lower elevations at times near coast. Breaks higher up mostly Carneddau to Bala-Berwyn groups.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Little or no sun. Visibility good where dry, but often poor in rain western areas.
How Cold? (at 900m)
3C. Feeling like -5 to -8C in the wind.
Freezing Level
Above the summits.
Planning Outlook
Scottish mountain tops stay below freezing throughout this week ahead, snowfalls on Tuesday most prolonged east and southern areas. Thereafter, the Highlands see mostly little precipitation this week, but snow and hail showers will feed in from the north at times, locally giving frequent snow to the far north and the north Cairngorms. Frost also common in the glens. For England & Wales, snow on Monday night turns to rain into Tuesday as the freezing level rises above the summits, then dropping back to freezing above 800m midweek with a mix of rain and upland snow. A mixed outlook into the weekend and beyond, some quieter windows, but further areas of rain and hill snow are likely, perhaps milder air into late November.