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.
Snow flurries
Occasional light snow flurries, sleet or rain lower elevations. Amounts little more than nuisance value, but locally more persistent and reducing visibility for periods.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Terrain widely frozen
All ground frozen from lower elevations upward, with hard frost or snow cover. Beware of icy surfaces on lower and higher terrain. Appropriate footwear needed, crampons may be necessary.
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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.
Snow flurries
Occasional light snow flurries, sleet or rain lower elevations. Amounts little more than nuisance value, but locally more persistent and reducing visibility for periods.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Terrain widely frozen
All ground frozen from lower elevations upward, with hard frost or snow cover. Beware of icy surfaces on lower and higher terrain. Appropriate footwear needed, crampons may be necessary.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 10th January 2026
Last updated
Sat 10th Jan 26 at
8:07AM
Summary for all mountain areas
Most terrain frozen, snow cover over many hills, beware icy surfaces even lower down. Wind fairly light, but windy Scottish highlands. Some snow showers and flurries, the snow frequent W & NW Highlands where hills extensively foggy.
Headline for Eryri / Snowdonia National Park
Wind fairly light, some brief showers or flurries, patchy cloud.
How windy? (On the summits)
Northwest turning west later southwesterly 15 to 20mph, lowest speeds typically in middle of the day. Strengthening onward into the night to gales 50-60mph+.
Effect of the wind on you?
Fairly small, but noticeable wind chill in exposure on high tops. Deteriorating significantly into night.
How Wet?
Local showers, flurries western tops
Occasional light showers drifting in from the coast, snow flurries over hills, mostly rain spots below 500m, tending to fade afternoon. Largely dry eastern hills.
Cloud on the hills?
Varied patches
Patches of cloud some slopes, mostly drifting onto higher tops toward the west coast above 600-700m, well broken further inland. Local mist possible in valleys.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Mix of cloud and sun, best in east. Visibility very good where dry and below cloud, but reduced to occasionally poor if in showers.
How Cold? (at 900m)
-2C. Feeling like -8C if exposed to wind.
Freezing Level
Much terrain frozen inland, frost into valleys in morning; then 500m, up to 700m nearest the west coast.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 11th January 2026
Last updated
Sat 10th Jan 26 at
8:07AM
How windy? (On the summits)
Southerly, in range 50 to 60mph much of daytime, at times 70mph high tops, peak speeds likely to vary during day.
Effect of the wind on you?
Difficult conditions over the mountains; frequent buffeting and powerful gusts to some lower slopes, significant wind chill.
How Wet?
Rain often heavy; rapid thawing
Snow briefly over the hills up to dawn, possibly freezing rain for a time, soon becoming sleet then all rain up to higher slopes, setting in heavier over western hills. Increasingly wet underfoot as snow melts.
Cloud on the hills?
Extensive
Shrouding the hills widely, to lower slopes near coast and Llyn peninsula, higher bases toward north of the A5 and more eastern groups, rarely above 600m.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast and mostly dull. Visibility generally very poor.
How Cold? (at 900m)
1C at dawn, rising to 5C, small variation of temperature with height in morning. Wind chill feeling like -10 to -15C.
Freezing Level
Variable up to dawn, partly frozen from inland valleys upward; soon rising quickly above freezing to high tops.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 12th January 2026
Last updated
Sat 10th Jan 26 at
8:07AM
How windy? (On the summits)
Southwesterly 45 to 60mph.
Effect of the wind on you?
Challenging conditions, arduous walking over the hills, buffeting gusts to some lower slopes. Considerable wind chill.
How Wet?
Rain much of the day, heavy bursts
Frequent to near-constant rain, some heavier showery bursts mixed in, possible hail, chance of isolated thunder in west. Very wet underfoot due to previous rain and snow melt.
Cloud on the hills?
Often covering western tops
Covering higher hills most or all day above 700-800m, at times 500-600m near to the Irish Sea. Some breaks higher up mostly Carneddau and Berwyn to Bala groups.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Rare if any glimpses of sun. A general haze, visibility poor in rain.
How Cold? (at 900m)
3 or 4C. Wind chill feeling around -10C where directly exposed on tops.
Freezing Level
Above the summits.
Planning Outlook
Thawing develops during Sunday, snow turning to rain, rising just above freezing toward highest tops in Scotland, whilst in England and Wales a more rapid and substantial thaw - beware unstable snowpack conditions, then becoming very wet underfoot where melting occurs. A complex and unsettled outlook next week, generally less cold than recently, but still often below freezing over Scottish mountains above 800-1000m, and at least intermittently below freezing over tops in England and Wales. A mix of snow and rain will fall, often snow on Scottish tops with fresh accumulations. Some showery days with hail. Wind will vary in speed and direction day-to-day, some lulls, but risk gales at times on hills.