Mountain weather
Eryri / Snowdonia Mountain weather forecast table
Confidence
High for cloudy and rather humid conditions, low for shower detail.
This evening forecast
Rather cloudy with a chance of, mainly light, showers through the middle of the day. Winds light to moderate from the south, rather warm and feeling humid.
Mountain weather forecast
Cloudy, humid with showers at times.
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
Weather (at 800m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 800m) |
<05% | <05% | 20% | 20% | 20% | 10% | <05% | <05% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
SE
29
|
SE
21
|
SE
18
|
S
14
|
SW
11
|
SW
14
|
SW
17
|
SW
20
|
| 600m |
SE
17
|
SE
13
|
SE
12
|
S
14
|
SW
13
|
SW
13
|
SW
14
|
SW
14
|
| 300m |
SE
7
|
SE
7
|
SE
5
|
S
8
|
SW
8
|
SW
9
|
SW
9
|
S
7
|
| Valley |
SE
8
|
SE
7
|
SE
5
|
S
7
|
SW
8
|
SW
8
|
SW
9
|
S
7
|
Wind gust (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m | 34 | 25 | 21 | 18 | 15 | 18 | 22 | 24 |
| 600m | 25 | 17 | 16 | 18 | 18 | 18 | 19 | 18 |
| 300m | 18 | 13 | 11 | 13 | 14 | 14 | 14 | 15 |
| Valley | 19 | 14 | 11 | 12 | 13 | 13 | 14 | 15 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
10°
|
11°
|
11°
|
10°
|
9°
|
8°
|
6°
|
5°
|
| 600m |
13°
|
12°
|
12°
|
12°
|
10°
|
10°
|
8°
|
7°
|
| 300m |
13°
|
13°
|
14°
|
14°
|
13°
|
12°
|
11°
|
9°
|
| Valley |
14°
|
14°
|
14°
|
15°
|
14°
|
14°
|
12°
|
10°
|
| Freezing Level |
2,700m
|
2,600m
|
2,700m
|
2,700m
|
2,700m
|
2,500m
|
1,700m
|
1,600m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
5°
|
7°
|
7°
|
7°
|
6°
|
4°
|
2°
|
0°
|
| 600m |
9°
|
10°
|
10°
|
9°
|
8°
|
7°
|
5°
|
3°
|
| 300m |
12°
|
12°
|
13°
|
13°
|
12°
|
10°
|
9°
|
7°
|
| Valley |
13°
|
12°
|
13°
|
14°
|
13°
|
12°
|
11°
|
9°
|
Additional weather information
Meteorologist's view
It will be rather humid through the day, so pack plenty of water when heading out onto the hills. A light waterproof would also be advised.
Weather
Isolated light showers through the morning, turning drier into the evening. Rather cloudy throughout.
Chance of cloud-free hill tops
80%, cloud basses falling to 500m in showers.
Low cloud and visibility
Mainly good, but decreasing moderate to poor in any showers.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Mostly dry, but rather cloudy. A risk of rain by the evening.
Chance of cloud-free hill tops
70%. Early cloud as low as 400 m over W slopes. Becoming mostly cloud free. Bases dropping to 300-400 m in rain into the evening.
Maximum wind speed expected
Mainly southerly at 10-15 mph.
Temperature
- At 800m 9 C
- Valley 14 C
- Freezing level Above summits.
Low cloud and visibility
Mainly good. Moderate at first and poor in rain later in the day.
Mountain weather information
Sun 3 May
Sunrise:
Sunset:
Locally heavy rain at first, becoming lighter and patchier into the afternoon. Cloudy throughout with peaks often shrouded.
Mon 4 May
Sunrise:
Sunset:
Rather cloudy with bright spells. Isolated showers, mainly in the afternoon. Feeling cooler than of late.
Tue 5 May
Sunrise:
Sunset:
Bright with some sunny spells. An isolated shower possible, but mainly dry. Light winds.
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.