Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Cool to mild
Air temperature 8 to 12C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Click an icon for more information or click here for a key to all icons.
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.
Cool to mild
Air temperature 8 to 12C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 30th July 2025
Last updated
Tue 29th Jul 25 at
4:00PM
Summary for all mountain areas
Generally cloudy conditions, covering some hill slopes in the morning, but breaking and lifting above many tops. Occasional sun breaking through, mainly in the east. In western Scotland, a weak front pushing in will lower the cloud over coastal hills and bring a little drizzle at times. Light winds overall.
Headline for Eryri / Snowdonia National Park
Largely dry day, cloud lifting and breaking. Moderate breeze.
How windy? (On the summits)
Northwest later westerly 15 to 20mph.
Effect of the wind on you?
Fairly small
How Wet?
Substantially dry
Often dry, risk of odd drizzly showers. By evening into night, steadier drizzly rain moving in from the west, likely persistent rain into night.
Cloud on the hills?
Low cloud gradually lifting and breaking
Fairly extensive across the hills in morning, bases 500-700m, or lower at first near coasts. Base gradually rising and breaks forming. Patches may come and go on highest tops into early afternoon, but increasingly clearing. Lowering by dusk.
Chance of cloud free summits?
30% rising to 80%
Sunshine and air clarity?
Glimpses of sun, becoming increasingly sunny Visibility good below cloud, may become more widely very good afternoon.
How Cold? (at 900m)
9C rising to 11C or slightly higher well inland afternoon.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 31st July 2025
Last updated
Tue 29th Jul 25 at
4:00PM
How windy? (On the summits)
West to northwesterly 20 to 25mph.
Effect of the wind on you?
Starting to affect balance and comfortable walking in places on exposed tops and ridges.
How Wet?
Rain then showers
Risk of fairly persistent rain from dawn into early morning, breaking up into showers, local heavy bursts into afternoon, these tending to move away eastwards.
Cloud on the hills?
Extensive, lifting with some breaks
Covering the hills widely, lowest bases to mid-slopes near coast in morning. Bases rising to upper slopes, some breaks forming, but often capping higher tops; better later in day.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief bursts of sun developing. Visibility reduced in rain, becoming very good away from showers.
How Cold? (at 900m)
9 or 10C.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 1st August 2025
Last updated
Tue 29th Jul 25 at
4:00PM
How windy? (On the summits)
Northwesterly 25 to 30mph.
Effect of the wind on you?
Affecting comfortable walking and balance on some higher exposed tops and ridges. Considerable wind chill.
How Wet?
Showers
Showery rain most frequent near north-facing coasts in the morning, some showers pushing increasingly inland, tending to fade with time.
Cloud on the hills?
Covering tops, some improvement
Covering higher areas fairly widely above 700-800m in morning, locally 600m or lower for a time toward north and near Llyn peninsula. Tending to rise and break toward upper slopes in afternoon, but patches may come and go high tops.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Glimpses of sun, most sun near coast in afternoon. Visibility becoming very good away from showers, slight coastal haze.
How Cold? (at 900m)
6C rising to 8 or 9C. Feeling below freezing in the wind, nearer -5C in morning higher tops.
Freezing Level
Above the summits
Planning Outlook
Westerly winds prevail in the extended outlook, with occasional fronts moving through - western mountains often shrouded in cloud, periods of rain and drizzle. Some showery bursts of rain further eastwards, particularly Thursday-Friday this week, but often smaller amounts of rain toward easternmost hills, and cloud bases often higher with breaks to eastern summits. Moderate breezes, sometimes more blustery - early next week looks windier for a time. Temperatures near average, though rather cool in Scotland late this week and again early next week. Ridges of higher pressure will build occasionally from the southwest for better windows of weather, particularly England & Wales.