Mountain weather

Mountain weather

Eryri / Snowdonia

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red Warning
Red weather warnings in force for Eryri / Snowdonia

Confidence

High for mainly dry, increasingly hot and humid conditions.

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.
Updated: 
Mountain hazards explained

Mountain weather forecast

Dry, very warm and sunny, feeling increasingly humid.

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

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 SE 13mph knots
SE
13mph
 SE 11mph knots
SE
11mph
 S 10mph knots
S
10mph
 S 13mph knots
S
13mph
 SE 16mph knots
SE
16mph
 SE 18mph knots
SE
18mph
600m
 600m SE 11mph knots
SE
11mph
 S 10mph knots
S
10mph
 S 9mph knots
S
9mph
 SW 10mph knots
SW
10mph
 SE 12mph knots
SE
12mph
 SE 12mph knots
SE
12mph
300m
 300m SE 7mph knots
SE
7mph
 SE 7mph knots
SE
7mph
 S 6mph knots
S
6mph
 NE 6mph knots
NE
6mph
 SE 8mph knots
SE
8mph
 SE 6mph knots
SE
6mph
Valley
 Valley SE 7mph knots
SE
7mph
 SE 7mph knots
SE
7mph
 S 6mph knots
S
6mph
 W 6mph knots
W
6mph
 S 8mph knots
S
8mph
 SE 6mph knots
SE
6mph

Wind gust

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 16mph 13mph 13mph 16mph 20mph 22mph
600m
 600m 16mph 12mph 12mph 13mph 16mph 18mph
300m
 300m 15mph 10mph 9mph 9mph 14mph 14mph
Valley
 Valley 15mph 10mph 9mph 9mph 13mph 14mph

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 15 degrees Celsius 16 degrees Celsius 18 degrees Celsius 19 degrees Celsius 17 degrees Celsius 16 degrees Celsius
600m
 600m 18 degrees Celsius 19 degrees Celsius 21 degrees Celsius 21 degrees Celsius 21 degrees Celsius 20 degrees Celsius
300m
 300m 20 degrees Celsius 23 degrees Celsius 25 degrees Celsius 25 degrees Celsius 25 degrees Celsius 23 degrees Celsius
Valley
 Valley 20 degrees Celsius 24 degrees Celsius 26 degrees Celsius 26 degrees Celsius 26 degrees Celsius 24 degrees Celsius
Freezing Level Freezing Level
3600m
3400m
3600m
3600m
3700m
3700m

Additional weather information

Meteorologist's view

It will be a very warm and muggy feeling day. Pack light clothing, a hat, sun cream and plenty of water.

Weather

Dry with plenty of sunny spells and light winds.

Chance of cloud-free hill tops

Over 95%.

Low cloud and visibility

Good or excellent visibility, although hazy at times.

Ground conditions

Please see - https://yrwyddfa.live/

Summit specific forecast

The Eryri (Snowdonia) mountains are made up of 90 mountain peaks including the tallest mountain in Wales, Yr Wyddfa (Snowdon), standing at 1,085 metres.

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