Snowdonia National Park Forecast

Also includes higher summits south to Plynlimon.

Viewing Weather Forecast for Sunday 28th August 2016
Forecast last updated on Saturday 27th August 2016 at 2:58pm

Today | Monday | Tuesday

Summary for all mountain areas

Light winds on most summits as a thundery low moves away eastwards. A mix of showers and more widespread, locally thundery rain, will fizzle out only slowly through the day, and particularly in the morning, banks of cloud will shroud even many lower slopes.

Headline for Snowdonia National Park

Areas of low cloud and rain will only slowly disperse. Light wind.

How windy? (On the summits)

West veering northwest or northerly: specs will vary, but generally in the range 10 to 20mph.

Effect of wind on you?

Small

How Wet?

Areas of showery rain will slowly clear. Small risk lightning.

Confidence in detail low: A mix of dry areas, showers and patches of constant rain lasting 2 or 3 hours. Small risk thunder eastern hills. The trend through the day will be for the rain to fizzle out, initially on summits near the coast.

Cloud on the hills?

Extensive, but slowly lifting

Will vary, in places between adjacent mountains. Broadly, areas of fog from just above valleys upward will be extensive in morning. Slowly breaks in the cloud will become more extensive and more summits clear. By late afternoon, most summits up to 800 to perhaps 1000m should have cleared.

Chance of cloud free summits?

20% post dawn; rising to 70% by late afternoon.

Sunshine and air clarity?

Occasional sunshine - perhaps sunnier hills near the coast by late afternoon. Hazy, particularly morning.

How Cold? (at 900m)

10C.

Freezing Level

Above the summits.

Planning Outlook

All mountain areas of Britain from Monday 29th August 2016

Mixed conditions through the coming week. Winds predominantly off the Atlantic, will bring rain to W & NW Scotland late Monday, continuing occasionally through Tuesday, whilst elsewhere after a fine day Monday, low cloud will shroud western mountains on Tuesday. Clearing to a few showers across Scotland on Wednesday whilst a band of rain progresses southeastwards elsewhere. Further rain, probably only briefly likely Thursday night or Friday and this may be followed by a few dry days.

In association with
Mountaineering Council of Scotland sportscotland Association of Mountaineering Instructions