Mountain weather
Eryri / Snowdonia Mountain weather forecast table
Confidence
High for mainly dry and settled weather but low for cloud amounts.
This evening forecast
Mainly cloudy with some fog above 600m, but a few clear spells over northeast Snowdonia. Light westerly winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.
Mountain weather forecast
Mainly cloudy, dry with light winds.
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
Weather (at 800m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 800m) |
10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% |
Wind direction and speed (mph)
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 900m |
W
19
|
W
20
|
W
16
|
W
14
|
W
12
|
NW
9
|
NW
6
|
E
5
|
| 600m |
SW
12
|
W
12
|
W
10
|
W
9
|
W
8
|
NW
6
|
NE
3
|
E
3
|
| 300m |
SW
6
|
W
7
|
W
5
|
W
6
|
W
6
|
NW
5
|
NW
2
|
E
2
|
| Valley |
SW
6
|
W
7
|
W
5
|
W
6
|
W
6
|
NW
5
|
W
2
|
SE
2
|
Wind gust (mph)
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 900m | 23 | 24 | 20 | 17 | 15 | 12 | 7 | 7 |
| 600m | 16 | 16 | 13 | 13 | 11 | 9 | 5 | 5 |
| 300m | 13 | 13 | 10 | 10 | 10 | 8 | 4 | 4 |
| Valley | 12 | 13 | 10 | 10 | 10 | 9 | 4 | 4 |
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 900m |
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
5°
|
5°
|
| 600m |
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
7°
|
7°
|
| 300m |
10°
|
10°
|
9°
|
10°
|
10°
|
10°
|
10°
|
9°
|
| Valley |
11°
|
11°
|
11°
|
11°
|
12°
|
12°
|
11°
|
10°
|
| Freezing Level |
2,700m
|
2,700m
|
2,600m
|
2,600m
|
2,600m
|
2,500m
|
2,500m
|
2,400m
|
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 900m |
1°
|
1°
|
2°
|
2°
|
3°
|
3°
|
4°
|
3°
|
| 600m |
5°
|
4°
|
5°
|
5°
|
6°
|
6°
|
7°
|
6°
|
| 300m |
8°
|
8°
|
8°
|
8°
|
9°
|
9°
|
9°
|
9°
|
| Valley |
10°
|
10°
|
10°
|
10°
|
10°
|
11°
|
10°
|
10°
|
Additional weather information
Meteorologist's view
A settled start to November but some fog on higher slopes may make navigation difficult, especially in the morning.
Weather
Cloudy overnight with the odd shower. Staying mostly cloudy through the day but a few bright intervals in the afternoon. Largely dry but a few light showers are possible.
Chance of cloud-free hill tops
20% overnight and early morning, becoming 60%.
Low cloud and visibility
Extensive cloud above 500m overnight and start of the day. This will lift but patchy cloud may continue to affect summits above 800m through the afternoon. Otherwise, visibility will be good.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Mostly dry, cloudy and mild with perhaps a few clear or bright intervals in the west. A chance of one or two light showers but amounting to very little.
Chance of cloud-free hill tops
40%.
Maximum wind speed expected
East or southeast 10 to 15mph.
Temperature
- At 800m Plus 5C rising to 8C.
- Valley Plus 8C rising to 13 or 14C.
- Freezing level Well above summits.
Low cloud and visibility
Generally good visibility at most heights. Increasing chance of fog on the higher summits with patchy cloud above 700m
Mountain weather information
Sun 3 Nov
Sunrise:
Sunset:
High pressure continues to dominate conditions. Staying dry with a better chance of sunny spells than previous days. Fresh southeast winds on the tops. Mild.
Mon 4 Nov
Sunrise:
Sunset:
Remaining dry, mild and rather cloudy. Strong southeast winds on the tops.
Tue 5 Nov
Sunrise:
Sunset:
The dry conditions may break down with outbreaks of rain spreading in from the west. Strong southerly 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.