Mountain weather

Mountain weather

Eryri / Snowdonia

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Confidence

High for a generally dry weekend until Sunday evening. Low for details of rain and showers early next 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

Cloudy at times but also some sunny spells.

Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
 Weather symbols Sunny intervals Cloudy Sunny intervals Cloudy Sunny intervals Partly cloudy (night)
Chance of
precipitation
(at 800m)
 Chance of precipitation
10%
10%
10%
10%
<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 W 14mph knots
W
14mph
 W 15mph knots
W
15mph
 W 16mph knots
W
16mph
 W 16mph knots
W
16mph
 W 11mph knots
W
11mph
 S 7mph knots
S
7mph
600m
 600m W 8mph knots
W
8mph
 W 13mph knots
W
13mph
 W 13mph knots
W
13mph
 W 13mph knots
W
13mph
 W 9mph knots
W
9mph
 S 9mph knots
S
9mph
300m
 300m W 4mph knots
W
4mph
 W 9mph knots
W
9mph
 W 10mph knots
W
10mph
 W 10mph knots
W
10mph
 W 6mph knots
W
6mph
 S 6mph knots
S
6mph
Valley
 Valley W 4mph knots
W
4mph
 W 9mph knots
W
9mph
 W 11mph knots
W
11mph
 W 10mph knots
W
10mph
 W 6mph knots
W
6mph
 S 6mph knots
S
6mph

Wind gust

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 17mph 20mph 20mph 21mph 14mph 9mph
600m
 600m 10mph 17mph 17mph 17mph 12mph 11mph
300m
 300m 8mph 14mph 16mph 15mph 9mph 10mph
Valley
 Valley 8mph 14mph 16mph 15mph 9mph 10mph

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 4 degrees Celsius 4 degrees Celsius 5 degrees Celsius 6 degrees Celsius 7 degrees Celsius 7 degrees Celsius
600m
 600m 8 degrees Celsius 8 degrees Celsius 9 degrees Celsius 10 degrees Celsius 11 degrees Celsius 9 degrees Celsius
300m
 300m 12 degrees Celsius 11 degrees Celsius 12 degrees Celsius 13 degrees Celsius 14 degrees Celsius 11 degrees Celsius
Valley
 Valley 13 degrees Celsius 13 degrees Celsius 14 degrees Celsius 15 degrees Celsius 15 degrees Celsius 13 degrees Celsius
Freezing Level Freezing Level
1900m
1900m
1900m
1900m
1900m
2000m

Additional weather information

Meteorologist's view

A fine day for hill walking once any cloud lifts clear of the summits. Despite it not feeling especially hot, remember to protect your skin from the strong sunshine as UV levels will be high.

Weather

It will often be cloudy but sunny spells will also occur, more especially in the east. Staying mainly dry, just a small chance of an isolated shower. Cloud breaking more widely later this afternoon and evening.

Chance of cloud-free hill tops

70% becoming 95%

Low cloud and visibility

Periods of cloud above 800m, mainly west of Capel Curig, until mid to late morning. Cloud lifting and clearing most summits by early to mid-afternoon. Poor visibilities in the cloud on the highest routes but otherwise very good visibility with excellent air clarity.

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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