Mountain weather
Eryri / Snowdonia
Confidence
High for the overall story. Moderate for timing of cloud clearance Tuesday morning.
-
This eveningSunrise:Sunset:
-
Tue 7 JulSunrise:Sunset:
-
Wed 8 JulSunrise:Sunset:
-
Further outlook
This evening forecast
A bright and warm evening, though any late sunshine may be rather hazy. Low cloud and fog spreading inland from the west as the night progresses, bringing mist and murk plus spots of drizzle.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Poor Visibility
Mountain weather forecast
Early low cloud clearing with sunnier spells emerging.
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | SW 20mph knots
SW
20mph |
W 19mph knots
W
19mph |
W 20mph knots
W
20mph |
W 18mph knots
W
18mph |
W 16mph knots
W
16mph |
W 13mph knots
W
13mph |
W 13mph knots
W
13mph |
W 12mph knots
W
12mph |
|
600m
|
600m | SW 13mph knots
SW
13mph |
W 8mph knots
W
8mph |
NW 10mph knots
NW
10mph |
W 12mph knots
W
12mph |
W 12mph knots
W
12mph |
W 10mph knots
W
10mph |
NW 8mph knots
NW
8mph |
S 5mph knots
S
5mph |
|
300m
|
300m | S 5mph knots
S
5mph |
W 3mph knots
W
3mph |
NW 4mph knots
NW
4mph |
W 7mph knots
W
7mph |
W 8mph knots
W
8mph |
W 7mph knots
W
7mph |
W 4mph knots
W
4mph |
SW 2mph knots
SW
2mph |
|
Valley
|
Valley | S 5mph knots
S
5mph |
W 3mph knots
W
3mph |
NW 5mph knots
NW
5mph |
W 8mph knots
W
8mph |
W 9mph knots
W
9mph |
W 7mph knots
W
7mph |
NW 5mph knots
NW
5mph |
SW 2mph knots
SW
2mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 24mph | 23mph | 24mph | 23mph | 21mph | 18mph | 17mph | 14mph |
|
600m
|
600m | 17mph | 11mph | 13mph | 17mph | 17mph | 14mph | 11mph | 7mph |
|
300m
|
300m | 9mph | 6mph | 8mph | 11mph | 12mph | 10mph | 7mph | 3mph |
|
Valley
|
Valley | 9mph | 7mph | 9mph | 12mph | 13mph | 11mph | 8mph | 4mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C |
|
600m
|
600m | 13 degrees Celsius 13°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 16 degrees Celsius 16°C |
|
Valley
|
Valley | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 19 degrees Celsius 19°C | 17 degrees Celsius 17°C |
| Freezing Level | Freezing Level |
3100m
|
3500m
|
3400m
|
3700m
|
3800m
|
3700m
|
3800m
|
3900m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C |
|
600m
|
600m | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 13 degrees Celsius 13°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 15 degrees Celsius 15°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C |
|
Valley
|
Valley | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 18 degrees Celsius 18°C | 19 degrees Celsius 19°C | 18 degrees Celsius 18°C |
| Freezing Level | Freezing Level |
3100m
|
3500m
|
3400m
|
3700m
|
3800m
|
3700m
|
3800m
|
3900m
|
Additional weather information
Meteorologist's view
Whilst morning sunshine may be hazy behind cloud cover, UV levels will still be high.
Weather
Low cloud and hill fog to begin the day, before lifting and clearing shortly after dawn. Some hazy sunshine possible during the morning, then lengthier spells of strong July sunshine developing in the afternoon. Feeling warm in the valleys and low-lying areas of the Park. Staying dry throughout.
Chance of cloud-free hill tops
40% rising to 80% after dawn.
Low cloud and visibility
Early low cloud, bases down to 300-400m, and hill fog quickly clearing after dawn. From then on, cloud primarily above the summits but the occasional patch at 700-800m may push into north-facing slopes. Very poor visibility in low cloud and fog at first, becoming very good or excellent by mid-morning.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Patchy morning cloud and valley fog increasingly dispersing to leave a dry and widely sunny day. High UV levels and feeling very warm.
Chance of cloud-free hill tops
80% at first, increasing to 95% by the afternoon.
Maximum wind speed expected
10-15 mph westerly winds on the hills.
Temperature
- At 800m Plus 10 Celsius, rising to plus 18 Celsius.
- Valley Plus 13 Celsius, rising to plus 23 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Scrappy bits of cloud at 700-800m first thing. This, and all other cloud, largely clearing by the afternoon. Excellent visibility throughout.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Thu 9 Jul
The warm and settled spell continuing. Some fair weather cloud around may make sunshine hazier but still tending to be above the summits for the majority of the time. Feeling very warm.
Fri 10 Jul
Another dry day with little cloud and prolonged spells of strong sunshine. High UV levels and feeling very warm.
Sat 11 Jul
Perhaps more cloud around compared to previous days, though still largely above the summits. Mostly dry with the small chance of a shower. Still very warm.
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.