Snowdonia National Park Forecast

Viewing Weather Forecast for Tuesday 15th October 2019

Includes all summits in the the northern half of Wales from Plynlimon northwards.

Forecast last updated on Tuesday 15th October 2019 at 4:34pm

Summary for all mountain areas

A slack weather situation across the British Isles. Generally dry, or just pockets of drizzle. Chance a local burst of rain Wales. Wind mostly light. A murky morning with fog from low levels up in places, some hills above or between cloud layers. A weak front west of Scotland makes little progress, with most western hills largely clear.

Headline for Snowdonia National Park

Dry overall. Cloud breaks toward tops. Wind freshening.

How windy? (On the summits)

Little wind much of morning. Becoming south to southwesterly, 15-25mph afternoon. After dark, strengthening toward 40mph.

Effect of wind on you?

Mostly small; deteriorating after dark.

How Wet? (Precipitation and its impact)

A little rain possible

The day perhaps largely dry. Chance of local patches of rain, perhaps an isolated heavier burst afternoon. Persistent rain then moves in from west overnight.

Cloud on the hills?

Breaks toward higher slopes

Banks of cloud across the hills at various levels from dawn, lifting and breaking toward higher slopes, although stubborn to clear locally above 800m, particularly if patchy rain occurs.

Chance of cloud free summits?


Air clarity (below cloud)

Sun breaking through, sometimes hazy due to high cloud. Murky some areas in morning, some fog banks in valleys leaving slight haze.

How Cold? (at 900m)


Freezing Level

Above the summits.

Planning Outlook

All mountain areas of Britain from Wednesday 16th October 2019

A front makes slow progress northeastward during Wednesday, with rain lasting many hours. Thursday onward through weekend - areas of rain or showers will rotate around a slow-moving centre of low pressure, some heavy bursts with hail and thunder, but also areas which escape dry most or all of a day. Wind speeds varied, local gales at times, but also marked lulls. Temperatures on the cool side, persistently near or below freezing point on higher Scottish Munros with snow likely to fall and lie above about 1100m. Fairly benign autumn conditions are expected early next week.