Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
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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.
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.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 3rd August 2026
Last updated
Sun 2nd Aug 26 at
4:00PM
Summary for all mountain areas
Some rain drifts north across Scotland, with low cloud banks mostly on south-facing hill groups. A gusty east-southeasterly wind all day England & Wales, and strengthens with time across the Highlands. Humid with warm sun and thin high cloud for England & Wales, later risk of rain in west.
Headline for Eryri / Snowdonia National Park
Gusty wind. Largely dry until late, hazy sun, warm and humid.
How windy? (On the summits)
Southeasterly 20 to 30mph, gusts 35mph at times some slopes, a little less during afternoon, then increasing again into the evening.
Effect of the wind on you?
Blustery, gusty in places on higher and lower slopes, may affect balance on ridges at times.
How Wet?
Risk of rain mainly later in day
Most of the day dry. In afternoon, some spots from high cloud may develop in west, then risk of some bursts of rain forming into evening from the west. Greater risk of rain widely onward into night, some heavy.
Cloud on the hills?
Likely none until late
Rare if any brief patches around upper slopes, forming mainly later in day if rain develops, filling in near coast toward dusk.
Chance of cloud free summits?
Above 90% until late
Sunshine and air clarity?
Some weak sunshine through thin high cloud; beware sunburn. Cloud tends to thicken afternoon. Some haze, although generally very good visibility.
How Cold? (at 900m)
15C rising to 18C afternoon, humid.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 4th August 2026
Last updated
Sun 2nd Aug 26 at
4:00PM
How windy? (On the summits)
Generally southerly 20 or 25mph.
Effect of the wind on you?
Mostly fairly small - gusty near showers
How Wet?
Risk heavy showers
Patchy drizzly rain possible at first before becoming dry. In afternoon heavy, possibly thundery showers may develop.
Cloud on the hills?
Extensive, although may clear at times afternoon
In morning, expect blanket of fog across higher ares, sometimes the cloud below 500m or 300m near Lleyn peninsula. Will improve as general cloud base lifts to 500 to 700m, and perhaps clears at times east Wales and north of A5.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Occasional sunshine. Hazy, and visibility poor in rain.
How Cold? (at 900m)
14C
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 5th August 2026
Last updated
Sun 2nd Aug 26 at
4:00PM
How windy? (On the summits)
West-southwesterly, speed may vary during day, but mostly in range 25 to 40mph, risk up to 50mph north tops.
Effect of the wind on you?
Ease of walking affected, at times more strenuous and making balance challenging on ridges. Marked wind chill.
How Wet?
Showery rain
Rain most common on western hills, may be locally frequent with odd heavier showers. Scattered showers passing eastwards.
Cloud on the hills?
Fairly extensive
Covering many higher slopes much of the day above 500-700m, lowest and most persistent west coasts and during rain. Some breaks forming where dry in east.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Brief sun breaking through mainly east. A general slight haze, reduced further in rain.
How Cold? (at 900m)
9 or 10C, little change all day. Feeling near or below freezing in the stronger wind.
Freezing Level
Above the summits.
Planning Outlook
Low pressure circulates slowly over Britain into midweek bringing areas of rain and thundery showers widely, accompanied by brisk winds up to gale force for periods. Trending toward westerlies later in the week and next weekend, by then most rain and low cloud in western Scotland, but showery rain elsewhere at times. Generally fresh temperatures widely, often in mid-single figures over Scottish high tops. Despite falls of rain, beware of ongoing fire management restricting access to hills locally.