Mountain weather
Eryri / Snowdonia Mountain weather forecast table
Confidence
High for overall conditions, low for location of mist and fog patches this morning.
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.
Mountain weather forecast
Bright and largely sunny day ahead.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 800m) |
|
|
|
|
|
|
Chance of precipitation (at 800m) |
00% | 00% | 00% | 00% | 00% | <05% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
S
5
|
N
3
|
W
5
|
NW
6
|
NE
4
|
E
10
|
| 600m |
S
6
|
SE
2
|
NW
4
|
NW
7
|
N
4
|
E
8
|
| 300m |
SE
4
|
S
1
|
NW
4
|
NW
6
|
NW
3
|
SE
5
|
| Valley |
SE
4
|
S
1
|
NW
4
|
NW
6
|
NW
3
|
SE
5
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m | 6 | 4 | 7 | 9 | 6 | 12 |
| 600m | 8 | 3 | 7 | 9 | 5 | 10 |
| 300m | 6 | 2 | 7 | 9 | 5 | 9 |
| Valley | 6 | 2 | 7 | 9 | 5 | 9 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
8°
|
9°
|
10°
|
10°
|
10°
|
10°
|
| 600m |
10°
|
11°
|
13°
|
13°
|
12°
|
12°
|
| 300m |
12°
|
14°
|
16°
|
15°
|
14°
|
12°
|
| Valley |
12°
|
15°
|
17°
|
16°
|
15°
|
13°
|
| Freezing Level |
1,400m
|
1,400m
|
1,800m
|
2,200m
|
2,200m
|
2,200m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
7°
|
9°
|
10°
|
9°
|
9°
|
7°
|
| 600m |
9°
|
11°
|
12°
|
11°
|
12°
|
10°
|
| 300m |
11°
|
14°
|
15°
|
14°
|
14°
|
12°
|
| Valley |
12°
|
15°
|
16°
|
15°
|
14°
|
12°
|
Additional weather information
Meteorologist's view
A great day for any outdoor activities. Feeling rather chilly at first with warmer layers recommended. Strong sunshine and high UV levels expected so sun protection is suggested.
Weather
Some isolated mist or fog patches in sheltered valleys to start, these will quickly clear. Then dry and bright with thin high cloud, before largely sunny conditions develop. Feeling warm in the sunshine due to light to moderate southeasterly winds. Dry but becoming cloudy this evening.
Chance of cloud-free hill tops
95%
Low cloud and visibility
Potential for some mist and fog in sheltered valleys at first which should quickly lift. Visibility will be poor or very poor in any mist or fog at first but excellent otherwise, with good views of distant peaks likely.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A cloudier day compared to recent day, with often large amounts of high cloud and patchy lower level cloud around at times. But still the day will be bright and cloud will largely remain above the summits. Brisk south-easterly winds over the summits. Freezing level above summits.
Chance of cloud-free hill tops
95%.
Maximum wind speed expected
Southeast 20-25 mph.
Temperature
- At 800m Plus 10 rising to Plus 13.
- Valley Plus 11 rising to Plus 16.
- Freezing level Above summits.
Low cloud and visibility
Very good visibility with clear summits, although some distant summits may be hazy.
Mountain weather information
Mon 27 Apr
Sunrise:
Sunset:
Another mostly dry and bright day, with perhaps isolated afternoon showers. Breezy, with southeast to northerly winds. Freezing level above summits.
Tue 28 Apr
Sunrise:
Sunset:
Return to dry conditions on Tuesday although variable amounts of cloud around throughout the day. Gentle to breezy easterly winds and freezing level above summits.
Wed 29 Apr
Sunrise:
Sunset:
Another dry and bright day with patchy cloud and gentle to breezy winds. Freezing level above summits.
Updated at:
Summit specific forecast
Mountain summit forecast map
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Key
Mountain summits
Other points of interest
Cluster of multiple stations
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.