Mountain weather
Snowdonia Mountain weather forecast table
Confidence
High for fine and dry weather to dominate, moderate for cloud cover over the weekend.
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
Dry and sunny with a chilly start.
| 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% | 00% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 900m |
SE
22
|
SE
24
|
SE
16
|
SE
17
|
SE
18
|
E
21
|
| 600m |
SE
15
|
SE
15
|
SE
14
|
SE
14
|
SE
12
|
SE
13
|
| 300m |
SE
12
|
SE
12
|
SE
11
|
SE
11
|
SE
8
|
SE
10
|
| Valley |
SE
12
|
SE
12
|
SE
11
|
SE
10
|
SE
8
|
SE
10
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 900m | 28 | 28 | 22 | 23 | 23 | 26 |
| 600m | 23 | 20 | 19 | 20 | 18 | 19 |
| 300m | 22 | 20 | 18 | 19 | 17 | 18 |
| Valley | 22 | 19 | 17 | 18 | 16 | 18 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 900m |
5°
|
6°
|
8°
|
9°
|
8°
|
7°
|
| 600m |
8°
|
8°
|
11°
|
12°
|
11°
|
9°
|
| 300m |
8°
|
11°
|
14°
|
15°
|
14°
|
10°
|
| Valley |
9°
|
12°
|
15°
|
16°
|
15°
|
12°
|
| Freezing Level |
900m
|
900m
|
1,200m
|
1,300m
|
1,400m
|
1,300m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 900m |
0°
|
0°
|
4°
|
6°
|
5°
|
2°
|
| 600m |
4°
|
5°
|
8°
|
9°
|
9°
|
6°
|
| 300m |
5°
|
8°
|
11°
|
12°
|
12°
|
8°
|
| Valley |
6°
|
10°
|
13°
|
14°
|
13°
|
9°
|
Additional weather information
Meteorologist's view
It will be a chilly start to the day but temperatures soon warm up and with high UV levels sun protection and water will be very important.
Weather
A warm, dry and sunny day. By late afternoon cloud cover will increase but it will remain bright and feel very pleasant in the sunshine with high UV levels. Variable cloud cover overnight will keep temperatures a little warmer than recent nights.
Chance of cloud-free mountain/hill tops at 800m
100%
Visibility
Excellent.
Ground conditions
Please see - https://www.eryri.llyw.cymru/visiting/walking/ground-conditions
Mountain weather information
Weather
Dry and bright day, with high level cloud creating hazier sunshine. UV levels will remain high through the day, though temperatures will be a little cooler than Friday, particularly on hill tops where there will be a strong breeze. Dry overnight but becoming a little cloudier.
Chance of cloud-free mountain/hill tops at 800m
100% becoming 80% overnight as patchy cloud may cover some hill tops with bases of 500-800m
Maximum wind speed expected
Easterly 20mph with gusts of up to 35mph.
Temperature
- At 800m Plus 2 Celsius becoming Plus 9 Celsius.
- Valley Plus 7 Celsius becoming Plus 16 Celsius.
- Freezing level 1200m
Visibility
Excellent through the day, becoming poor at times in low cloud overnight.
Mountain weather information
Sunday 25 April
Sunrise:
Sunset:
A dry and bright day, feeling cooler in the north-easterly breeze. Freezing level 800m.
Monday 26 April
Sunrise:
Sunset:
Cloudy but dry throughout the day. Still feeling cool in a northerly breeze. Freezing level 1000m.
Tuesday 27 April
Sunrise:
Sunset:
Cloudy and cool with some light rain at times and a northerly breeze. Freezing level 1000m.
Updated at:
Mountain summits
Other points of interest
Cluster of multiple stations
The Snowdonia mountains are made up of 90 mountain peaks including the tallest mountain in Wales, Snowdon, standing at 1,085 metres.
The region can be divided into four areas with the northernmost area the most popular, including peaks such as Moel Hebog, Mynydd Mawr and the Nantlle Ridge. Many hikers tend to concentrate on Snowdon itself regarding it as a fine mountain. However it can become quite crowded, with the peak welcoming around half a million visitors every year, of which four fifths scale the peak on foot, while the remainder choose to take the train instead.
One of Snowdon’s main attractions is the sheer number and variety of paths that reach the peak. This means that everyone from mountaineering novices to climbing experts should find a way up the mountain that will suit their abilities or provide them with a sufficient test. The easiest is the Llanberis path which, being the longest, has the most shallow ascent. In contrast, the Watkin Path is widely seen as being the most demanding ascent, despite also being considered the prettiest.