Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Cold
Air temperature below freezing all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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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.
Cold
Air temperature below freezing all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 28th March 2025
Last updated
Thu 27th Mar 25 at
12:33PM
Summary for all mountain areas
Squally showers of hail and snow will come in off the Atlantic in strong westerly winds. Over the NW and then the W Highlands, precipitation may set in for a few hours, giving risk of whiteout. Small risk thunder.
Headline for Eryri / Snowdonia National Park
Gusty wind; hail and snow showers.
How windy? (On the summits)
Westerly 35mph higher tops, but particularly mid Wales often 25 or 30mph; squally near showers.
Effect of the wind on you?
Considerable wind chill. Frequent buffeting, especially near precipitation.
How Wet?
Hail showers, risk lightning
Hail and snow showers, mainly afternoon, risk isolated thunder. Precipitation mostly rain below 600m.
Cloud on the hills?
Frequently covering higher tops.
Cloud base changing in and out of showers: mostly above 700m, clearing most tops periodically (especially east Wales), but patches below 500m in showers.
Chance of cloud free summits?
30% west to 70% east Wales
Sunshine and air clarity?
Patchy sun, mainly east Wales. Slight haze.
How Cold? (at 900m)
0C. Will feel as cold as minus 10C directly in the wind.
Freezing Level
900m
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 29th March 2025
Last updated
Thu 27th Mar 25 at
12:33PM
How windy? (On the summits)
Westerly 15 or 20mph, slowly strengthening to 25mph or by late afternoon 30-40mph Snowdon range.
Effect of the wind on you?
Mostly small, but particularly late in day walking becoming arduous with considerable buffeting and wind chill where exposed.
How Wet?
Little or no rain
Substantially dry. But may turn drizzly toward evening most likely between Snowdon and Lleyn peninsula.
Cloud on the hills?
Probably extensive on highest tops
Cloud base typically 600 to 900m by late morning (lowest westernmost summits). Will probably lower, most pronounced western mountains toward evening, where below 400m.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Patches of sunshine, mainly east Wales will tend to give way as cloud thickens afternoon. Very good or excellent visibility.
How Cold? (at 900m)
0 rising to 3C. Will feel as cold as minus 10C directly in the wind.
Freezing Level
900m at first; above the summits by midday.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 30th March 2025
Last updated
Thu 27th Mar 25 at
12:33PM
How windy? (On the summits)
Northwesterly 30 to 40mph; probably tending to ease to 20mph through the day, and later backing westerly.
Effect of the wind on you?
Considerable buffeting and wind chill higher up, particularly morning.
How Wet?
Substantially or completely dry
Risk of a little drizzle near the west coast evening.
Cloud on the hills?
Confined to higher tops: may clear nearly all summits afternoon
By late morning cloud base typically 650 to 800m lowest toward the coast. Cloud base may lift to 900m or above afternoon. Toward or during evening, mainly near the coast will begin to form on lower slopes.
Chance of cloud free summits?
60% afternoon
Sunshine and air clarity?
Patchy sunshine; most sun lower slopes east Wales. Slight haze.
How Cold? (at 900m)
4C Rising slowly through the day. Will feel as cold as minus 8C directly in the wind.
Freezing Level
Above the summits
Planning Outlook
Rain, or on higher areas snow, mainly Saturday, on the W & NW Highlands. Elsewhere, occasional rain (sometimes snow higher areas Scotland) over the next few days, but total rainfall small - before into next week pressure rises across the UK and it becomes extensively dry and warm. Later next week, some forecasts then suggest a marked drop in temperature levels as the high pressure shifts location.