Mountain weather

Mountain weather

Eryri / Snowdonia

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Confidence

High throughout, though low for rain ad shower 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 and fine day ahead with more settled weather.

Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
 Weather symbols Sunny Sunny Sunny Sunny Sunny Cloudy
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 16mph knots
SE
16mph
 SE 16mph knots
SE
16mph
 E 18mph knots
E
18mph
 E 20mph knots
E
20mph
 E 21mph knots
E
21mph
 E 30mph knots
E
30mph
600m
 600m SE 11mph knots
SE
11mph
 SE 9mph knots
SE
9mph
 E 13mph knots
E
13mph
 E 14mph knots
E
14mph
 E 12mph knots
E
12mph
 E 16mph knots
E
16mph
300m
 300m SE 8mph knots
SE
8mph
 SE 8mph knots
SE
8mph
 E 10mph knots
E
10mph
 E 10mph knots
E
10mph
 E 8mph knots
E
8mph
 E 12mph knots
E
12mph
Valley
 Valley SE 8mph knots
SE
8mph
 SE 8mph knots
SE
8mph
 E 10mph knots
E
10mph
 E 10mph knots
E
10mph
 E 8mph knots
E
8mph
 E 12mph knots
E
12mph

Wind gust

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 19mph 19mph 23mph 25mph 26mph 38mph
600m
 600m 16mph 12mph 17mph 19mph 17mph 28mph
300m
 300m 16mph 12mph 16mph 17mph 15mph 25mph
Valley
 Valley 16mph 12mph 16mph 17mph 16mph 25mph

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 9 degrees Celsius 8 degrees Celsius 9 degrees Celsius 10 degrees Celsius 9 degrees Celsius 6 degrees Celsius
600m
 600m 12 degrees Celsius 12 degrees Celsius 12 degrees Celsius 13 degrees Celsius 13 degrees Celsius 10 degrees Celsius
300m
 300m 14 degrees Celsius 15 degrees Celsius 16 degrees Celsius 16 degrees Celsius 17 degrees Celsius 13 degrees Celsius
Valley
 Valley 14 degrees Celsius 16 degrees Celsius 17 degrees Celsius 18 degrees Celsius 18 degrees Celsius 14 degrees Celsius
Freezing Level Freezing Level
2100m
2000m
1900m
2100m
2100m
2100m

Additional weather information

Meteorologist's view

A fine day for any outdoor activities 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 sunshine through the day, with some fair weather cloud bubbling up during the afternoon, with high cloud turning sunshine hazy at times.

Chance of cloud-free hill tops

>95%.

Low cloud and visibility

Some mist and shallow fog in the valleys at first this should quickly clear. Beyond this no low level cloud or visibility issues are expected with excellent visibilities expected and 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.

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