Mountain weather

Mountain weather

Eryri / Snowdonia

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Confidence

High confidence on generally settled conditions on Monday, moderate confidence on extent of high-level cloud. High confidence on conditions deteriorating by Tuesday, moderate to low confidence on the detail of low cloud and precipitation throughout Tuesday.

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.
Updated: 
Mountain hazards explained

Mountain weather forecast

A dry and fine day ahead.

Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
 Weather symbols Cloudy Cloudy Sunny intervals Sunny intervals Sunny intervals Clear night
Chance of
precipitation
(at 800m)
 Chance of precipitation
<5%
<5%
<5%
<5%
<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 SW 11mph knots
SW
11mph
 S 10mph knots
S
10mph
 S 9mph knots
S
9mph
 S 7mph knots
S
7mph
 E 13mph knots
E
13mph
 E 26mph knots
E
26mph
600m
 600m S 9mph knots
S
9mph
 S 7mph knots
S
7mph
 SW 8mph knots
SW
8mph
 S 6mph knots
S
6mph
 SE 8mph knots
SE
8mph
 SE 13mph knots
SE
13mph
300m
 300m S 5mph knots
S
5mph
 S 4mph knots
S
4mph
 S 6mph knots
S
6mph
 S 4mph knots
S
4mph
 SE 4mph knots
SE
4mph
 SE 8mph knots
SE
8mph
Valley
 Valley S 5mph knots
S
5mph
 S 4mph knots
S
4mph
 S 5mph knots
S
5mph
 S 4mph knots
S
4mph
 SE 4mph knots
SE
4mph
 SE 8mph knots
SE
8mph

Wind gust

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 13mph 12mph 11mph 9mph 16mph 32mph
600m
 600m 11mph 9mph 11mph 8mph 10mph 20mph
300m
 300m 7mph 7mph 9mph 7mph 7mph 17mph
Valley
 Valley 8mph 7mph 9mph 7mph 7mph 17mph

Altitude above mean sea level
Time
 Time
06:00
09:00
12:00
15:00
18:00
21:00
900m
 900m 3 degrees Celsius 3 degrees Celsius 6 degrees Celsius 8 degrees Celsius 5 degrees Celsius 3 degrees Celsius
600m
 600m 6 degrees Celsius 7 degrees Celsius 9 degrees Celsius 11 degrees Celsius 9 degrees Celsius 7 degrees Celsius
300m
 300m 9 degrees Celsius 11 degrees Celsius 12 degrees Celsius 14 degrees Celsius 12 degrees Celsius 10 degrees Celsius
Valley
 Valley 10 degrees Celsius 12 degrees Celsius 14 degrees Celsius 15 degrees Celsius 13 degrees Celsius 11 degrees Celsius
Freezing Level Freezing Level
1400m
1500m
1600m
1700m
1800m
1700m

Additional weather information

Meteorologist's view

A great day for outdoor activities in the national park with plenty of dry and bright weather on offer. UV levels are still expected to be moderate, so sun protection is advised.

Weather

High pressure will bring a dry day with lengthy sunny periods, once any early isolated mist and valley fog has cleared.

Chance of cloud-free hill tops

>95%

Low cloud and visibility

Some mist or fog patches are possible during the early morning in prone valleys; these may reduce the visibility locally but should quickly clear. Great views of distant hills for most of the day with cloud bases above summit.

Ground conditions

No recent ground conditions report available.

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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