Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
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.
Click an icon for more information or click here for a key to all icons.
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
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
Friday 17th April 2026
Last updated
Thu 16th Apr 26 at
3:31PM
Summary for all mountain areas
Strong, gusty wind all day, gales in Scotland, risk severe coastal northwest. Persistent early rain in Scotland breaks to heavy showers, frequent west, clusters spreading east. Several hours of heavy rain sweeps east across England and Wales; driest start Pennines, and dry windows later in Snowdonia and Lakeland.
Headline for Eryri / Snowdonia National Park
Often raining, breaks through afternoon; strong gusty wind
How windy? (On the summits)
Southwesterly 40-45mph from dawn, strong gusts approaching 50mph over highest tops for a few early hours. Trending towards 30-35mph through afternoon, locally stronger towards Anglesey.
Effect of the wind on you?
Arduous walking most of the day in exposure; significant wind chill and considerable buffeting, the strongest gusts requiring great effort to maintain balance. Effects easing towards mid-Wales.
How Wet?
Heavy rain for several hours, an easing tendency later
Rain and drizzle from before dawn, setting in persistently for several morning hours, extensive heavy falls on south and west slopes. A trend towards showers through afternoon, through may stay more broadly rainy for a time; driest later in the day.
Cloud on the hills?
Extensive for several hours, breaks afternoon
From dawn, cloud shrouds high terrain, variable lower banks, mostly towards Cardigan Bay and soon filling in more widely to middle slopes as rain sets in, to lower slopes south and west. Breaking afternoon as rain eases, though high summits struggle to clear, and occasionally returning to 800m or lower in showers. Bases always higher Carneddau.
Chance of cloud free summits?
10%, rising to 30%
Sunshine and air clarity?
Mostly cloudy, dull for several hours in rain with poor visibility. Glimpses of sun breaking out through afternoon with good visibility, most sun expected north and east hill groups.
How Cold? (at 900m)
5 or 6C morning, trending cooler afternoon, to 4C evening and lowering further by several degrees overnight. Feeling like -5 to -7C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 18th April 2026
Last updated
Thu 16th Apr 26 at
3:31PM
How windy? (On the summits)
Westerly 25mph, at times 30mph high tops, gusty in showers. Trending northwesterly and easing somewhat.
Effect of the wind on you?
Feeling blustery over higher terrain, in places affecting ease of walking with noticeable wind chill in exposure on tops.
How Wet?
Showers, hail
Showery rain on and off throughout the day, locally more frequent in west in morning, brief heavier bursts with hail, also drizzly on summits in cloud between showers.
Cloud on the hills?
Varying over high tops, lifting
Patchy cloud over higher tops most common toward the west in the morning, likely to come and go above 700m for a few hours, briefly lower near coast at first; tending to lift with breaks to tops.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Brief bursts of sun, some sun more often toward coast later in day. Visibility varying, at times very good, but poor during showers.
How Cold? (at 900m)
2 or 3C, marginal rise into afternoon. Feeling like -5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 19th April 2026
Last updated
Thu 16th Apr 26 at
3:31PM
How windy? (On the summits)
Northerly 10mph or less, perhaps variable and an extended lull, reorienting northeasterly later.
Effect of the wind on you?
Negligible
How Wet?
Any precipitation unlikely
Cloud on the hills?
Early varied fog banks lift and dissipate
Scattered fog banks at various heights in the morning (including sheltered valleys), mostly on northern slopes. Soon lifting after daybreak, banks may linger on middle and upper slopes to the north for a time, but ultimately dissipating for cloud-free summits.
Chance of cloud free summits?
50% north at dawn, rising to 80%
Sunshine and air clarity?
Mostly sunny, some thin high cloud around, and some fair weather cloud building afternoon. Excellent visibility.
How Cold? (at 900m)
1C from dawn, rising to 2 or 3C, mildest mid-Wales (near Penygader).
Freezing Level
Above the summits.
Planning Outlook
Saturday stays showery, heavy at times with hail, most frequent and heavy in Scotland and northern England. Sun between the showers, conditions improving from the south, and then the weather more widely settled on Sunday: light or negligible wind, often sunny with chilly morning temperatures, though widely rising by at least a few degrees. High pressure north of Scotland next week facilitates east-to northeasterly winds, which may be quite blustery and gusty at times. Generally cooler temperatures too. Occasional light showers drifting from the east, notably early week, snow flurries on higher terrain. Variable freezing levels, likely lowest early in the week, and also some valley frosts at dawn. A mix of cloud and sunshine, most often sunny to the west of high hill groups where temperatures more mild.