Includes all summits in the the northern half of Wales from Plynlimon northwards.
Snowdonia National Park
Saturday 19th June 2021
Last updated
Fri 18th Jun 21 at
7:13PM
After a chilly start, a fine day will follow with a patchwork of sunshine. Chance of a few bursts of rain here and there, mainly inland in the afternoon. High cloud bases with hills extensively clear, although some banks of hill fog at first; particularly SE Highlands.
Early cloud banks clearing. Then fine with hazy sun. Increasingly blustery.
Southerly typically 15mph at first, although will increase during day to 20 to 25mph, particularly western summits where perhaps 30mph by evening
Mostly small, but there may be some buffeting western mountains later in day - affecting both higher & lower slopes.
Little or no rain
Chance of a few bursts of rain; likely to amount to very little.
Very little
Summits extensively or completely cloud free. However some early banks possible for a few hours after dawn, mainly across the eastern areas.
80%
Extensive sunshine overall, although areas of high, mostly thin cloud. Hazy although overall good visibility.
11C.
Above the summits.
Snowdonia National Park
Sunday 20th June 2021
Last updated
Fri 18th Jun 21 at
7:13PM
Low confidence in forecast: Easterly 25-40mph, risk 50mph for a few hours early in the day.
Walking arduous, or on higher tops difficult, at times through the day.
Pulses of rain, perhaps much of day.
Areas of rain will edge across the area to give frequent rainfall through day. Some heavy and perhaps thundery pulses and becoming more widely showery later.
Extensive
Very likely cloud shrouding the hills in fog extensive for much of the day. Bases generally around 500-800m, perhaps briefly as high as 900m in the west.
20%
Little or no sun. Visibility often poor due to rain, and otherwise fairly hazy.
7 to 9C
Above the summits.
Snowdonia National Park
Monday 21st June 2021
Last updated
Fri 18th Jun 21 at
7:13PM
Low confidence in detail: Northeasterly 15 to 25mph, risk 30mph tops for a time.
Blustery, will impede walking at times across higher tops with marked chill.
Scattered showers
A scattering of showers developing from mid morning onwards. Perhaps some locally heavy ones by afternoon.
Early banks higher tops, clearing.
Early banks of cloud covering higher tops, may persist much of morning Snowdon Range. However, by afternoon, hills mostly clear, bar some ragged patches tops.
70%
Fairly cloudy start, but patchy sun soon breaking through. Visibility mostly very good.
5C lifting to 7C
Above the summits.
Fairly chilly pattern early next week, but mostly fine with hills often clear as a ridge of high pressure dominates. However from midweek onwards, whilst turning warmer, it will become more changeable with the risk of pulses of showery rain from time to time as pressure gradually lowers from the west. However, there will still be some dry and fine periods; these conditions perhaps predominating still across eastern areas where broadly any rainfall amounts will be small.