Snowdonia National Park Forecast

The Snowdonia National Park.

Viewing Weather Forecast for Tuesday 4th August 2015
Forecast last updated on Monday 3rd August 2015 at 4:27pm

Summary for all mountain areas

Unusually widespread and strong upland gales for August will make walking difficult on the mountains, strongest winds western Scotland. Lots of showers, merging into several hours of rain in the west. Cloud often covering higher hills. Driest & brightest toward north-east.

Headline for Snowdonia National Park

Upland gales. Frequent showers, most persistent morning.

How windy? (On the summits)

Southwesterly 40mph, occasionally 45mph, easing only slowly toward 30-35mph by evening; gusts over 50mph on higher tops.

Effect of wind on you?

Widespread considerable buffeting all day, often difficult walking where exposed on higher areas.

How Wet?

Showers, mainly morning

Showers throughout the day, most frequent morning, locally the rain almost constant for several hours until about midday.

Cloud on the hills?

Extensive west

Persistent cloud, base varying but through morning tending to lift. From midday, typical base 500 to 700m westernmost areas to 750 to 900m elsewhere.

Chance of cloud free summits?

10% morning; 40% afternoon, 60% toward east.

Sunshine and air clarity?

Patches of sun, mainly well inland, and north of the A5. Haze; persistent fog most mountains.

How Cold? (at 900m)


Freezing Level

Above the summits

Planning Outlook

All mountain areas of Britain from Wednesday 5th August 2015

Remaining unsettled. Fronts pushing northwards on Wednesday will bring rain and strong winds to many mountains. Improving by Thursday, becoming mainly dry with much lighter winds. Friday brings mainly light winds but the risk of some slow moving heavy showers. A brief ridge of high pressure is expected to build around Saturday, but thereafter the pattern is likely to become west-south-westerly, bringing strengthening winds, particularly to Scotland, and risk of rain on many western mountains by Sunday.

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