Snowdonia National Park Forecast

Viewing Weather Forecast for Thursday 18th January 2018

Also includes higher summits south to Plynlimon.

Today | Friday | Saturday

Forecast last updated on Wednesday 17th January 2018 at 2:20pm

Summary for all mountain areas

A deep low will clear quickly eastwards in the morning - early storm force winds in England & Wales will ease. Then another day of cold westerly winds bringing snow or hail showers frequently to western mountains. Isolated thunder. Driest and brightest in eastern Scotland.

Headline for Snowdonia National Park

Upland gales. Snow and hail showers, locally persistent.

How windy? (On the summits)

Westerly; overnight risk of 90mph, but the stormy winds easing before dawn. During daylight, starting around 50mph, dropping toward 35mph by middle of day; gusty during showers.

Effect of wind on you?

Walking difficult on higher areas, especially morning. Sudden considerable buffeting near precipitation, even on lower slopes. Significant wind chill.

How Wet?

Frequent snow and hail

Snow and hail showers, sometimes frequent, locally persistent. Small risk thunder. Mostly rain in and just above valleys. Very wet underfoot after heavy overnight rain and snowmelt.

Cloud on the hills?

Rarely clearing higher areas

Cloud base changing quickly. Shafts of cloud on lower slopes near showers, and frequently shrouding higher terrain - although brief glimpses of some tops.

Chance of cloud free summits?


Sunshine and air clarity?

Glimpses of sun; most frequently easternmost mountains. Persistent haze.

How Cold? (at 900m)

-3C Feeling like -15C or below where exposed to wind.

Freezing Level


Planning Outlook

All mountain areas of Britain from Friday 19th January 2018

Cold westerly winds will bring further clusters of snow or hail showers into western regions for the rest of the week. Fewer showers by Saturday as winds ease and pressure builds. However, a front which moves in from the south-west later Saturday into Sunday brings a risk of persistent snow in some areas, which may transition widely to rain as temperatures lift. A chance that across much of the Scottish Highlands, it remains as snow much of Sunday. Into next week, expect periods of rain or snow and possible gales, with cycles of freeze and thaw, although the Scottish Munros rarely above freezing point.