Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
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.
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.
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
Monday 3rd November 2025
Last updated
Sun 2nd Nov 25 at
12:52PM
Summary for all mountain areas
Gale to, in places, severe gale force south-westerlies will drive in very extensive low cloud across the hills and rainfall. The rain will be near constant across western mountains, and on and off across eastern areas. Significant wind chill.
Headline for Eryri / Snowdonia National Park
South-westerly gales with persistent and often heavy rain and extensive hill fog.
How windy? (On the summits)
Southwesterly 45-55mph, may lift above 60mph into afternoon. Perhaps 70mph western coastal hills.
Effect of the wind on you?
Difficult if not in the afternoon very difficult walking and significant wind chill.
How Wet?
Persistent rain
Rain and drizzle most of the day, heaviest and persistent western mountains. Very wet underfoot with local flood risk. Progressively less wet north across Carneddau and east toward Berwyn mountains.
Cloud on the hills?
Extensive
Widely shrouding the mountains from 200 or 300m up, although progressively north of the A5 and east toward the Berwyn mountains, the cloud base rising to around 650m.
Chance of cloud free summits?
Almost nil
Sunshine and air clarity?
Extensively dull and misty with visibility poor in heavier rain.
How Cold? (at 900m)
9C. Feeling below freezing in direct wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 4th November 2025
Last updated
Sun 2nd Nov 25 at
12:52PM
How windy? (On the summits)
South to higher up southwesterly 40 to 50mph.
Effect of the wind on you?
Continued difficult conditions where exposed on higher areas, where wind chill will be significant and walking a struggle.
How Wet?
Frequent or persistent rain.
Rain most or all day. Breaks in the rain most likely east Wales. On western mountains, very wet underfoot and streams in spate with possible flooding.
Cloud on the hills?
Very extensive.
Widely persistent fog above 200 to 400m. Near and north from the A5 and toward Berwyn moutnains, higher cloud base, may reach 750m.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Little if any sun: mostly dull and misty.
How Cold? (at 900m)
8C Will feel as cold as minus 5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 5th November 2025
Last updated
Sun 2nd Nov 25 at
12:52PM
How windy? (On the summits)
Southerly 30 to 40mph in morning, easing down to 15 to 25mph in afternoon.
Effect of the wind on you?
Be prepared for arduous conditions in the morning with considerable wind chill. Easing into afternoon.
How Wet?
Frequent rainfall
Frequent pulses of at times heavy rainfall feeding up from the south. May set in through afternoon.
Cloud on the hills?
Extensive
Low cloud will blanket the hills in fog, down to the very lowest slopes across southern ranges and up the west coast.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast. Visibility often poor due to rain.
How Cold? (at 900m)
9C
Freezing Level
Above the summits
Planning Outlook
Remaining very unsettled with as a series of deep Atlantic lows, and their associated fronts, continue to cross Britain over the next week to ten days. Frequently windy, with high rainfall, particularly on western mountains (rain at some stage almost daily) and cloud will frequently cover higher areas. Only rarely cold enough for snow higher mountains in Scotland.