Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
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.
Clear
Excellent or superb visibility, no navigation issues.
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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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
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.
Clear
Excellent or superb visibility, no navigation issues.
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
Thursday 2nd April 2026
Last updated
Wed 1st Apr 26 at
4:14PM
Summary for all mountain areas
Patchy cloud lingering on upper hills at dawn, clearing for several hours of sunshine and light wind. Wind begins strengthening from the west in Scotland, high cloud builds, with rain and snow arriving and spreading into central Scotland by evening. England and Wales stay dry, small increase in wind and high cloud later.
Headline for Eryri / Snowdonia National Park
Mostly sunny with light wind, some early cloud banks
How windy? (On the summits)
Northerly 15mph at dawn, soon easing to 10mph with variable direction for several hours, reorienting southwesterly through afternoon, speeds approaching 20-25mph by nightfall with stronger gusts over high tops.
Effect of the wind on you?
Mostly small
How Wet?
Likely entirely dry
Small chance of a few odd spots of light drizzly rain in east Wales at dawn, but otherwise dry. Around or after evening, some patchy rain approaches westernmost slopes.
Cloud on the hills?
Rising to just high terrain, summit breaks
In the morning, most cloud Snowdon group to Carneddau, 700m and up, a risk more extensive around dawn. Fog lifts to mostly just summits, good chance of clear summits for several hours, though the occasional cloud patch may drift over the high tops.
Chance of cloud free summits?
Rising to 70%
Sunshine and air clarity?
Often or mostly sunny. Excellent visibility.
How Cold? (at 900m)
-1C, lifting to 0C, or +1 Berwyn group.
Freezing Level
700-800m, gradually lifting towards 900m as evening approaches, lifting off the summits overnight.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 3rd April 2026
Last updated
Wed 1st Apr 26 at
4:14PM
How windy? (On the summits)
Southwesterly 35-45mph, powerful gusts. Stronger winds likely early and late, approaching 50mph+.
Effect of the wind on you?
Conditions often arduous in exposure, feeling chilly despite mild temperatures, more challenging early and late.
How Wet?
Patchy rain
Rain comes and goes over most hills throughout the day, typically light and patchy in nature, through a risk of some heavier bursts with time.
Cloud on the hills?
Extensive
Cloud blankets high terrain likely all day, bases regularly down to the middle slopes, or lower slopes on western aspects, particularly during rain. Some higher breaks near/north of the A5, but breaks above 700-800m are unlikely.
Chance of cloud free summits?
10%
Sunshine and air clarity?
A few glimpses of sun around Carneddau where visibility good, but otherwise overcast and dull.
How Cold? (at 900m)
4 or 5C, rising towards 7C. Feeling as cold as -8C in strongest wind.
Freezing Level
Above the summits, lowering to
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 4th April 2026
Last updated
Wed 1st Apr 26 at
4:14PM
How windy? (On the summits)
Southerly, briefly 20mph at dawn, but rapid increase to 50-60mph middle of day, then in afternoon 70mph+ higher mountains.
Effect of the wind on you?
Small early in day, but likely deteriorating significantly during daytime - any mobility increasingly difficult by afternoon at least.
How Wet?
Rain and drizzle
Patchy rain soon develops to be persistent for a time, leaving drizzly conditions at least in western areas, continuing much of the day, possibly steady rain continuing for periods. Later in day, heavier rain likely.
Cloud on the hills?
Fairly extensive, lowest west coast
Patchy cloud likely soon filling in widely over the mountains, down to lower slopes in west coastal areas, base nearer 600m toward Ogwen, perhaps higher breaks Carneddau to Bala, but tops often covered.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely overcast, increasingly dull. Visibility good at first mainly in north becoming poor.
How Cold? (at 900m)
1C at first, rising to 5C by middle of day, then lowering later, to 0C after dark. Feeling like -10C as wind strengthens.
Freezing Level
Near highest tops up to dawn, but soon rising well above summits. Into night, dropping back toward 900m.
Planning Outlook
Atlantic weather patterns and generally westerly wind will be dominant in the foreseeable future. The weekend ahead is increasingly unsettled, widespread gales on Easter with storm-force wind in Scotland, cooler temperatures, and showers west. Into next week, temperature and wind will be variable, periods of gales and possibly often cold over the mountains with snow and hail showers at times to lower elevations at least in Scotland, sometimes more widely. Precipitation generally most frequent west and northwest, though bands of heavy rain will sweep east at times. Some brief windows of drier and brighter conditions, as well as milder days in England and Wales, occasionally milder Scotland too, but soon followed by more Atlantic low pressure systems.