Mountain weather

Mountain weather

Eryri / Snowdonia

Printable version

Confidence

High overall.

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

Plenty of dry and sunny weather once again, still feeling hot.

Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
 Weather symbols Sunny Sunny Sunny Sunny 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 E 19mph knots
E
19mph
 E 14mph knots
E
14mph
 E 13mph knots
E
13mph
 E 12mph knots
E
12mph
 NE 17mph knots
NE
17mph
 NE 15mph knots
NE
15mph
600m
 600m SE 13mph knots
SE
13mph
 E 12mph knots
E
12mph
 E 10mph knots
E
10mph
 E 10mph knots
E
10mph
 NE 10mph knots
NE
10mph
 E 8mph knots
E
8mph
300m
 300m SE 7mph knots
SE
7mph
 E 9mph knots
E
9mph
 E 7mph knots
E
7mph
 E 8mph knots
E
8mph
 NE 8mph knots
NE
8mph
 E 4mph knots
E
4mph
Valley
 Valley SE 7mph knots
SE
7mph
 E 9mph knots
E
9mph
 E 7mph knots
E
7mph
 E 8mph knots
E
8mph
 NE 8mph knots
NE
8mph
 E 3mph knots
E
3mph

Wind gust

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 23mph 18mph 17mph 17mph 21mph 19mph
600m
 600m 21mph 16mph 14mph 14mph 14mph 12mph
300m
 300m 17mph 14mph 11mph 12mph 13mph 8mph
Valley
 Valley 17mph 14mph 11mph 13mph 13mph 7mph

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 12 degrees Celsius 12 degrees Celsius 14 degrees Celsius 16 degrees Celsius 14 degrees Celsius 13 degrees Celsius
600m
 600m 16 degrees Celsius 16 degrees Celsius 18 degrees Celsius 19 degrees Celsius 18 degrees Celsius 17 degrees Celsius
300m
 300m 18 degrees Celsius 19 degrees Celsius 22 degrees Celsius 23 degrees Celsius 21 degrees Celsius 20 degrees Celsius
Valley
 Valley 19 degrees Celsius 21 degrees Celsius 23 degrees Celsius 24 degrees Celsius 22 degrees Celsius 21 degrees Celsius
Freezing Level Freezing Level
2400m
2700m
2800m
2800m
2700m
2500m

Additional weather information

Meteorologist's view

A brilliant day to be in the national park. However, applying sunscreen regularly is advised as well as wearing a hat and sunglasses because UV levels will be Very High. High temperatures, especially during the afternoon, may lead to heat exhaustion. Keep hydrated by drinking plenty of water, and taking regular breaks from strenuous activity.

Weather

A dry and bright day with plenty of lengthy sunshine. A moderate easterly wind is expected to persist.

Chance of cloud-free hill tops

>95%.

Low cloud and visibility

No low cloud or visibility issues expected for the majority of the park. Some low cloud my hug the eastern part of the park early Wednesday morning but is expected to soon lift and dissipate. Excellent visibilities with views of distant peaks possible.

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.

Related links