Mountain weather
Eryri / Snowdonia
Confidence
High for mainly dry, increasingly hot and humid conditions. Lower confidence for a breakdown Thursday night with the risk of thunderstorms.
-
Wed 24 JunSunrise:Sunset:
-
Thu 25 JunSunrise:Sunset:
-
Further outlook
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Mountain weather forecast
Strong sunshine. Very hot and humid.
|
Time
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Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
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|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols | ||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | NE 7mph knots
NE
7mph |
SW 4mph knots
SW
4mph |
S 6mph knots
S
6mph |
N 7mph knots
N
7mph |
NE 9mph knots
NE
9mph |
E 14mph knots
E
14mph |
|
600m
|
600m | E 5mph knots
E
5mph |
N 4mph knots
N
4mph |
NW 7mph knots
NW
7mph |
NW 8mph knots
NW
8mph |
N 8mph knots
N
8mph |
E 11mph knots
E
11mph |
|
300m
|
300m | SE 2mph knots
SE
2mph |
NW 5mph knots
NW
5mph |
NW 7mph knots
NW
7mph |
NW 7mph knots
NW
7mph |
N 5mph knots
N
5mph |
E 5mph knots
E
5mph |
|
Valley
|
Valley | SE 2mph knots
SE
2mph |
NW 5mph knots
NW
5mph |
NW 7mph knots
NW
7mph |
N 7mph knots
N
7mph |
N 5mph knots
N
5mph |
E 5mph knots
E
5mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 9mph | 5mph | 8mph | 10mph | 12mph | 17mph |
|
600m
|
600m | 6mph | 5mph | 10mph | 11mph | 10mph | 15mph |
|
300m
|
300m | 4mph | 7mph | 9mph | 9mph | 8mph | 12mph |
|
Valley
|
Valley | 4mph | 7mph | 10mph | 10mph | 8mph | 11mph |
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 18 degrees Celsius 18°C | 19 degrees Celsius 19°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C |
|
600m
|
600m | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C |
|
300m
|
300m | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 23 degrees Celsius 23°C | 24 degrees Celsius 24°C | 23 degrees Celsius 23°C | 21 degrees Celsius 21°C |
|
Valley
|
Valley | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 23 degrees Celsius 23°C | 23 degrees Celsius 23°C | 22 degrees Celsius 22°C | 21 degrees Celsius 21°C |
| Freezing Level | Freezing Level |
3500m
|
3600m
|
3800m
|
3800m
|
3900m
|
3800m
|
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 18 degrees Celsius 18°C | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 20 degrees Celsius 20°C | 19 degrees Celsius 19°C | 18 degrees Celsius 18°C |
|
600m
|
600m | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 20 degrees Celsius 20°C |
|
300m
|
300m | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 24 degrees Celsius 24°C | 24 degrees Celsius 24°C | 23 degrees Celsius 23°C | 22 degrees Celsius 22°C |
|
Valley
|
Valley | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 23 degrees Celsius 23°C | 24 degrees Celsius 24°C | 23 degrees Celsius 23°C | 22 degrees Celsius 22°C |
| Freezing Level | Freezing Level |
3500m
|
3600m
|
3800m
|
3800m
|
3900m
|
3800m
|
Additional weather information
Meteorologist's view
Very hot and humid. Pack light clothing, sun cream and plenty of hydration. UV levels very high.
Weather
Extreme heat warning issued. Patches of low cloud, mist and valley fog first thing, this soon clearing then another very hot and humid day with strong sunshine. Hotter than Tuesday.
Chance of cloud-free hill tops
Over 90%.
Low cloud and visibility
Early mist and fog patches, but quickly clearing. Good visibility with distant hills visible, hazy at times.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Another hot day with strong sunshine, though hazy at times with high level cloud, developing more widely through the evening. Breezier than recent days.
Chance of cloud-free hill tops
Over 95%.
Maximum wind speed expected
Southeasterly 25-30 mph with gusts to 40 mph.
Temperature
- At 800m Plus 21 Celsius rising to plus 28 Celsius.
- Valley Plus 23 Celsius rising to plus 34 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Good visibility with distant hills visible, hazy at times.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Fri 26 Jun
Variable cloud and the odd heavy shower likely. Still very warm but less hot and humid. Moderate southwesterly breeze.
Sat 27 Jun
Dry with bright or sunny spells. Then thicker cloud and rain, potentially heavy, possibly arriving late evening.
Sun 28 Jun
Rain soon clears east, then cloudy conditions with patchy light rain or showers follows. Moderate southwesterly winds.
Mountain weather information
Fri 26 Jun
Variable cloud and the odd heavy shower likely. Still very warm but less hot and humid. Moderate southwesterly breeze.
Sat 27 Jun
Dry with bright or sunny spells. Then thicker cloud and rain, potentially heavy, possibly arriving late evening.
Sun 28 Jun
Rain soon clears east, then cloudy conditions with patchy light rain or showers follows. Moderate southwesterly winds.
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.