Mountain weather

Mountain weather

Eryri / Snowdonia

Confidence

High confidence for a good deal of fine and dry and occasionally very warm weather. Low for shower detail on Saturday or any light rain on Sunday.

Mountain hazards

Mountain weather hazards

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

Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.

Mountain weather forecast

Largely dry and cloudy, just a small chance of a shower.

Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
Weather symbols Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Partly cloudy (night)
Chance of
precipitation
(at 800m)
Chance of precipitation
10%
20%
20%
20%
<5%
<5%

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 16mph knots
S
16mph
SW 17mph knots
SW
17mph
SW 17mph knots
SW
17mph
SW 17mph knots
SW
17mph
SW 16mph knots
SW
16mph
SW 18mph knots
SW
18mph
600m
600m S 12mph knots
S
12mph
S 15mph knots
S
15mph
SW 16mph knots
SW
16mph
SW 16mph knots
SW
16mph
SW 13mph knots
SW
13mph
S 12mph knots
S
12mph
300m
300m SE 4mph knots
SE
4mph
S 9mph knots
S
9mph
SW 11mph knots
SW
11mph
SW 11mph knots
SW
11mph
SW 8mph knots
SW
8mph
S 7mph knots
S
7mph
Valley
Valley SE 4mph knots
SE
4mph
S 9mph knots
S
9mph
SW 11mph knots
SW
11mph
SW 11mph knots
SW
11mph
SW 8mph knots
SW
8mph
S 7mph knots
S
7mph

Wind gust

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
900m 19mph 21mph 23mph 23mph 21mph 21mph
600m
600m 16mph 20mph 22mph 22mph 18mph 16mph
300m
300m 11mph 15mph 18mph 18mph 14mph 14mph
Valley
Valley 12mph 15mph 17mph 18mph 14mph 14mph

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
900m 8 degrees Celsius 8 degrees Celsius 9 degrees Celsius 10 degrees Celsius 10 degrees Celsius 8 degrees Celsius
600m
600m 10 degrees Celsius 10 degrees Celsius 11 degrees Celsius 12 degrees Celsius 12 degrees Celsius 11 degrees Celsius
300m
300m 13 degrees Celsius 14 degrees Celsius 15 degrees Celsius 16 degrees Celsius 16 degrees Celsius 14 degrees Celsius
Valley
Valley 14 degrees Celsius 16 degrees Celsius 17 degrees Celsius 18 degrees Celsius 18 degrees Celsius 15 degrees Celsius
Freezing Level Freezing Level
2800m
2300m
2300m
3200m
3100m
3300m

Additional weather information

Meteorologist's view

A fine day, and despite some cloud cover, UV-levels will remain high. Appropriate sun-protection recommended.

Weather

Largely dry and cloudy, with some late afternoon sunshine. A small chance of a light shower thought the morning and afternoon but most.

Chance of cloud-free hill tops

100%

Low cloud and visibility

Good visibility with cloud bases well above tops.

Ground conditions

Please see - https://yrwyddfa.live/

Summit specific forecast