Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
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.
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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
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
Friday 4th July 2025
Last updated
Thu 3rd Jul 25 at
4:27PM
Summary for all mountain areas
Gales and rain setting in across Scotland. Rain will be persistent and heavy in the west - beware risk of local flooding. Clear fells for a time in England, rain and cloud setting in later afternoon. The Pennines from Yorkshire Dales southward mostly dry and free of cloud. A fair but windy day in Wales, rain only arriving later in north Wales.
Headline for Eryri / Snowdonia National Park
Wind increasing to gale force; substantially dry
How windy? (On the summits)
Southwesterly 30 to 40mph. Speeds increase through afternoon reaching 50mph+ over the tops into evening.
Effect of the wind on you?
Arduous walking conditions over the hills, may become difficult on high tops. Considerable wind chill.
How Wet?
Dry most of the day, rain sets in as night falls
Most of daytime dry. Rain setting in from the west as evening approaches, becoming persistent for a time as night falls - likely heavy falls on western slopes.
Cloud on the hills?
Lifting above tops much of day
Cloud caps over higher slopes in the morning will soon lift to expose many tops. Odd banks may return to western high slopes at times, becoming more frequent into the evening. Cloud then filling in more extensively into the night.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Fairly cloudy, glimpses of sun in east; cloud thickening from west with time. Visibility good, later reducing in rain.
How Cold? (at 900m)
9 or 10C, small rise during day. Feeling near/below freezing in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 5th July 2025
Last updated
Thu 3rd Jul 25 at
4:27PM
How windy? (On the summits)
Westerly to southwesterly 25 to 35mph.
Effect of the wind on you?
Very blustery over the mountains, frequent buffeting on high tops, challenging balance where exposed; feeling cool.
How Wet?
Frequent showery rain
Rain on and off much of the day, drizzly for a time on western slopes.
Cloud on the hills?
Extensive, base rising
Shrouding the mountains widely in morning above 400-600m, lifting gradually mostly above 700-800m, but persisting on tops. Occasional breaks to higher terrain around Carneddau.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Largely cloudy, brief moments of sun around Carneddau. Visibility at times very good, but poor during rain.
How Cold? (at 900m)
10 or 11C, locally reaching 12C around Ogwen valley. Feeling near/below freezing directly in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 6th July 2025
Last updated
Thu 3rd Jul 25 at
4:27PM
How windy? (On the summits)
West to northwesterly 25-30mph. Increasing into evening, risk up to 40mph over high tops.
Effect of the wind on you?
Comfortability of walking affected most of the day, becoming strenuous with buffeting gusts into evening. Feeling cool.
How Wet?
Showers, at times persistent
Showers most of the day, most frequent on northwest slopes facing Anglesey; may be drizzly here at times. May become fairly persistent rain for a few hours with heavy bursts.
Cloud on the hills?
Fairly extensive, some improvement
Extensive over high terrain much of the day. North and west slopes nearest Anglesey regularly shrouded to middle slopes. Becoming patchy later afternoon, tops southeast of Glyder Fawr/Snowdon increasingly clear.
Chance of cloud free summits?
20%, becoming 70% southeast
Sunshine and air clarity?
Greatest chance of glimpses southeast of high tops, improving later. Visibility often poor, good where cloud breaks.
How Cold? (at 900m)
7 or 8C Feeling at/near freezing in the wind.
Freezing Level
Above the summits
Planning Outlook
The weekend ahead will be generally unsettled: windy and feeling cool with low pressure bringing heavy showery rain widely. High pressure to the southwest will extend to the Isles early next week, settling the weather and allowing sun to break through Monday and Tuesday. Into the week, a mixed westerly regime dominates with greatest risk of rain toward northwest Scotland, drier and warmer further south and east. Several fronts will drift towards Britain from the northwest but high pressure to the southwest will prevent extended unsettled periods. England and Wales may only see occasional rain.