Snowdonia National Park Forecast

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

Viewing Weather Forecast for Thursday 18th July 2019
Forecast last updated on Wednesday 17th July 2019 at 3:01pm

Today | Friday | Saturday

Summary for all mountain areas

Scotland: Pulses of showery rain moving eastwards, some heavy with risk of thunder. Cloud fairly extensive higher areas. England and Wales: Early patchy rain will soon clear east with cloud bases lifting above most tops with only patches lingering some higher western tops PM. A few showers, mainly Lakes/N Pennines.

Headline for Snowdonia National Park

Becoming largely dry with cloud lifting to or above tops.

How windy? (On the summits)

West to southwesterly 15 to 20mph.

Effect of wind on you?

Fairly small, but may impede ease of walking on higher terrain.

How Wet? (Precipitation and its impact)

Becoming largely dry.

Remnants of overnight rain clears at dawn, leaving the rest of the day often dry. Brief showers possible from time to time, may become more frequent toward evening.

Cloud on the hills?

Lifting to high tops or above.

Early banks of low cloud will break up, clearing many hills into middle of day, leaving just occasional fragments higher slopes above 800-900m, most persistent hills nearest coast.

Chance of cloud free summits?


Air clarity (below cloud)

Patchwork of sun breaking through. Visibility mostly very good.

How Cold? (at 900m)

9 or 10C.

Freezing Level

Above the summits.

Planning Outlook

All mountain areas of Britain from Friday 19th July 2019

Pressure will be fairly low, and a humid southwesterly airflow will prevail later heading into the weekend and the early days of next week. Rain frequent, with some heavy falls at times, focused on western mountains, but local variations from day to day. Cloud often covering hills, although there will be breaks. Wind typically fairly light, but strengthening intermittently. Temperatures around average through the weekend, then trending increasingly warmer during next week.

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