Mountain weather

Mountain weather

Eryri / Snowdonia

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Confidence

High throughout, though lower for rain details later in the week.

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, with spells of sunshine.

Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
 Weather symbols Cloudy Cloudy Sunny intervals Sunny Sunny Clear night
Chance of
precipitation
(at 800m)
 Chance of precipitation
10%
10%
10%
20%
20%
<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 NE 4mph knots
NE
4mph
 NW 4mph knots
NW
4mph
 N 5mph knots
N
5mph
 N 9mph knots
N
9mph
 NE 10mph knots
NE
10mph
 E 13mph knots
E
13mph
600m
 600m E 3mph knots
E
3mph
 N 4mph knots
N
4mph
 N 7mph knots
N
7mph
 N 9mph knots
N
9mph
 NE 8mph knots
NE
8mph
 E 10mph knots
E
10mph
300m
 300m S 2mph knots
S
2mph
 N 4mph knots
N
4mph
 N 6mph knots
N
6mph
 NE 8mph knots
NE
8mph
 NE 7mph knots
NE
7mph
 E 7mph knots
E
7mph
Valley
 Valley S 2mph knots
S
2mph
 NW 4mph knots
NW
4mph
 N 6mph knots
N
6mph
 N 8mph knots
N
8mph
 NE 7mph knots
NE
7mph
 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 7mph 6mph 7mph 13mph 13mph 17mph
600m
 600m 4mph 6mph 9mph 12mph 12mph 15mph
300m
 300m 3mph 6mph 8mph 11mph 11mph 13mph
Valley
 Valley 3mph 6mph 9mph 12mph 10mph 12mph

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 6 degrees Celsius 7 degrees Celsius 9 degrees Celsius 9 degrees Celsius 8 degrees Celsius 7 degrees Celsius
600m
 600m 9 degrees Celsius 10 degrees Celsius 11 degrees Celsius 12 degrees Celsius 11 degrees Celsius 10 degrees Celsius
300m
 300m 11 degrees Celsius 13 degrees Celsius 14 degrees Celsius 14 degrees Celsius 14 degrees Celsius 12 degrees Celsius
Valley
 Valley 12 degrees Celsius 14 degrees Celsius 15 degrees Celsius 15 degrees Celsius 15 degrees Celsius 13 degrees Celsius
Freezing Level Freezing Level
2000m
1900m
2000m
1900m
1900m
2000m

Additional weather information

Meteorologist's view

A fine day to be in the park, UV levels remaining high so sun protection advisable.

Weather

Dry and clear during the early hours, with a few mist or fog patches through the valleys. Plenty of sunny spells through the day, with some fair weather cloud bubbling up during the afternoon, which may lead to an isolated light shower.

Chance of cloud-free hill tops

90%

Low cloud and visibility

Some mist and shallow fog in the valleys, otherwise nil and excellent visibility, though any passing light showers may cause a temporary reduction in visibility to moderate.

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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