Mountain weather

Mountain weather

Eryri / Snowdonia

Confidence

High for a largely settled day, lower for shower details through the morning then rain details Thursday and Saturday.

Sunrise: Sunset:
Sunrise: Sunset:
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

Showers gradually fading with winds easing.

Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
Weather symbols Light rain showers Light rain showers Light rain showers Sunny intervals Sunny Partly cloudy (night)
Chance of
precipitation
(at 800m)
Chance of precipitation
40%
40%
30%
20%
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 NW 23mph knots
NW
23mph
NW 16mph knots
NW
16mph
NW 15mph knots
NW
15mph
W 11mph knots
W
11mph
W 8mph knots
W
8mph
SW 8mph knots
SW
8mph
600m
600m NW 14mph knots
NW
14mph
NW 11mph knots
NW
11mph
NW 12mph knots
NW
12mph
W 10mph knots
W
10mph
W 6mph knots
W
6mph
S 8mph knots
S
8mph
300m
300m NW 9mph knots
NW
9mph
NW 8mph knots
NW
8mph
NW 9mph knots
NW
9mph
W 8mph knots
W
8mph
W 3mph knots
W
3mph
S 4mph knots
S
4mph
Valley
Valley NW 9mph knots
NW
9mph
NW 8mph knots
NW
8mph
NW 9mph knots
NW
9mph
W 8mph knots
W
8mph
W 3mph knots
W
3mph
S 4mph knots
S
4mph

Wind gust

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
900m 26mph 19mph 19mph 15mph 10mph 10mph
600m
600m 18mph 14mph 15mph 13mph 7mph 11mph
300m
300m 17mph 13mph 14mph 12mph 7mph 9mph
Valley
Valley 17mph 13mph 14mph 12mph 7mph 9mph

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
900m 1 degrees Celsius 2 degrees Celsius 3 degrees Celsius 4 degrees Celsius 4 degrees Celsius 4 degrees Celsius
600m
600m 5 degrees Celsius 6 degrees Celsius 7 degrees Celsius 8 degrees Celsius 8 degrees Celsius 7 degrees Celsius
300m
300m 8 degrees Celsius 10 degrees Celsius 10 degrees Celsius 11 degrees Celsius 11 degrees Celsius 10 degrees Celsius
Valley
Valley 10 degrees Celsius 12 degrees Celsius 12 degrees Celsius 13 degrees Celsius 13 degrees Celsius 11 degrees Celsius
Freezing Level Freezing Level
1800m
1700m
1700m
1700m
1400m
1600m

Additional weather information

Meteorologist's view

A good day to be in the national park with plenty of dry and bright weather around. Extra layers may be required at height as it will be feeling rather cold in the wind.

Weather

Apart from the odd light shower through the morning, it will be a largely dry and bright day. Still feeling on the cool side, but pleasant in any shelter and sunshine, especially later in the day.

Chance of cloud-free hill tops

70% rising to >95% through the morning.

Low cloud and visibility

Cloud may briefly lower to 800-900m during the passage of any showers during the first half of the day, otherwise generally above the summits. Visibilities generally very good, but falling to moderate in any showers and poor in any hill fog.

Ground conditions

No recent ground conditions report available.

Summit specific forecast