Mountain weather

Mountain weather

Eryri / Snowdonia

Confidence

High overall, but low confidence with the development of any cloud breaks in the east through Friday.

Mountain hazards

Mountain weather hazards

Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.

Poor Visibility
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.

Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.

Mountain weather forecast

A cloudy and windy day for much of the park, with an increasing risk of some heavy rain developing.

Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
Weather symbols Dull Light rain Light rain Heavy Rain Heavy Rain Heavy rain showers (night)
Chance of
precipitation
(at 800m)
Chance of precipitation
30%
40%
60%
70%
90%
60%

Wind direction and speed

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
900m S 43mph knots
S
43mph
S 44mph knots
S
44mph
SW 36mph knots
SW
36mph
SW 30mph knots
SW
30mph
SW 29mph knots
SW
29mph
SW 28mph knots
SW
28mph
600m
600m S 30mph knots
S
30mph
S 30mph knots
S
30mph
S 25mph knots
S
25mph
SW 21mph knots
SW
21mph
S 20mph knots
S
20mph
SW 18mph knots
SW
18mph
300m
300m S 19mph knots
S
19mph
S 18mph knots
S
18mph
S 16mph knots
S
16mph
S 13mph knots
S
13mph
S 13mph knots
S
13mph
S 12mph knots
S
12mph
Valley
Valley S 19mph knots
S
19mph
S 18mph knots
S
18mph
S 15mph knots
S
15mph
S 13mph knots
S
13mph
S 13mph knots
S
13mph
S 11mph knots
S
11mph

Wind gust

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
900m 50mph 52mph 45mph 37mph 37mph 35mph
600m
600m 37mph 38mph 33mph 28mph 27mph 24mph
300m
300m 32mph 31mph 29mph 23mph 24mph 22mph
Valley
Valley 32mph 31mph 27mph 23mph 23mph 21mph

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
900m 5 degrees Celsius 6 degrees Celsius 7 degrees Celsius 7 degrees Celsius 6 degrees Celsius 6 degrees Celsius
600m
600m 8 degrees Celsius 8 degrees Celsius 10 degrees Celsius 10 degrees Celsius 9 degrees Celsius 9 degrees Celsius
300m
300m 11 degrees Celsius 12 degrees Celsius 13 degrees Celsius 13 degrees Celsius 12 degrees Celsius 12 degrees Celsius
Valley
Valley 12 degrees Celsius 13 degrees Celsius 14 degrees Celsius 15 degrees Celsius 14 degrees Celsius 14 degrees Celsius
Freezing Level Freezing Level
3000m
3000m
3300m
3300m
3100m
3000m

Additional weather information

Meteorologist's view

Warm and humid conditions will persist over the coming days, increasing the risk of dehydration on the hills. Those heading out, especially on longer hikes, should carry extra water and pace accordingly.

Weather

Cloudy for much of the day, with outbreaks of rain and drizzle, along with hill fog. Perhaps some brighter breaks across eastern parts of the park during daylight hours. An increasing risk of some heavy rain moving in late afternoon and into the evening. Often strong and gusty winds.

Chance of cloud-free hill tops

20% in the west. 40% in the east.

Low cloud and visibility

Cloud bases around 300m for much of the day, but may lift to 600m at times in the east.

Ground conditions

Please see - https://yrwyddfa.live/

Summit specific forecast