Snowdonia National Park Forecast

The Snowdonia National Park.

Viewing Weather Forecast for Tuesday 6th October 2015
Forecast last updated on Monday 5th October 2015 at 4:20pm

Tomorrow | Wednesday | Thursday

How windy? (On the summits)

South to southeast 25-30mph at first, but a marked lull developing - direction variable afternoon. Very late in day, veering northwesterly 20 increasing 30mph.

Effect of wind on you?

Often very small. Possible local sudden gusts around thundery rain.

How Wet?

Thundery rain developing

Starting dry, but patchy rain developing from, south, turning increasingly heavy, risk some locally torrential bursts by early afternoon onward. Hail and thunder likely.

Cloud on the hills?

Very extensive overall

Persistent cloud from lower slopes upward many hills, bases 300 to 500, typically lowest toward east, but also coastal hills west from Porthmadog. A few higher breaks possible north of Carnedd plateau. Patches forming from forest canopies up during and after rain.

Chance of cloud free summits?


Sunshine and air clarity?

Rare glimpses of sun. Persistent haze lower areas, fog across the mountains.

How Cold? (at 900m)

8C, may rise to 10C.

Freezing Level

Above the summits.

Planning Outlook

All mountain areas of Britain from Wednesday 7th October 2015

Some uncertainty remains for Wednesday - rain threatens to persist eastern Highlands, perhaps also Borders. Improving from west, but temperatures falling, and freezing levels briefly near higher Scottish summits later and early Thursday. Pressure builds across England and Wales Thursday & Friday, giving fair conditions, although low cloud many western mountains. Toward weekend and beyond, high pressure building toward the east may bring renewed settled weather for several days.

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