Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Tuesday 11th December 2018
Forecast last updated on Monday 10th December 2018 at 3:10pm

Summary for all mountain areas

A murky day for many areas, with widespread fog across the hills, and patches of light rain or drizzle. The far north and northwest of Scotland will fare best for cloud breaks. Winds fairly light, but strengthening through the day on westernmost hills.

Headline for Snowdonia National Park

Low cloud and patchy drizzle. Wind strengthening.

How windy? (On the summits)

Southerly 20 increasing to 30mph, risk 40mph by dusk Snowdon range.

Effect of wind on you?

Will impede walking across higher areas, and perhaps becoming arduous. Some strong gusts reaching lower slopes.

How Wet? (Precipitation and its impact)

Isolated drizzle

Isolated patches of light rain/drizzle. Very little north of the A5.

Cloud on the hills?

Extensive, lowest bases coastal hills

Cloud is likely to shroud the hills throughout much, if not all, of the day. Down to lower slopes across western coastal hills. However, there will be some local breaks to higher tops at times, mostly north of the A5.

Chance of cloud free summits?


Air clarity (below cloud)

Rare glimpses of sun in morning. Marked haze throughout the day.

How Cold? (at 900m)


Freezing Level

Above the summits

Planning Outlook

All mountain areas of Britain from Wednesday 12th December 2018

A battle between cold air to the east and milder air to the west will take place later this week, with confidence low about the general developments into the weekend. It looks increasingly likely that for a couple of days at least, freezing levels will drop markedly, and there is scope for some snowfalls, chiefly on eastern hills. As fronts push northeastwards, there may be a more organised fall of snow into the weekend. Cycles of freeze and thaw are then likely. Winds varied, up to gale force at times, giving severe wind chill.

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