Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
Generally high, but some uncertainty in timing and persistence and intensity of rain Saturday afternoon and Sunday, it's clearance time on Monday, and timing of rain and wind strength on Wednesday.
This evening forecast
Patchy cloud and scattered showers.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.
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.
Severe Chill Effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Mountain weather forecast
Dry and bright start. Strengthening winds and rain later.
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 700m) |
<05% | <05% | <05% | <05% | 20% | 60% | 40% | 70% |
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 |
|---|---|---|---|---|---|---|---|---|
| 600m |
SW
30
|
SW
30
|
SW
34
|
SW
36
|
SW
36
|
SW
38
|
SW
39
|
SW
39
|
| 300m |
SW
12
|
SW
12
|
SW
14
|
SW
17
|
SW
21
|
SW
22
|
SW
24
|
SW
24
|
| Valley |
SW
11
|
SW
10
|
SW
12
|
SW
15
|
SW
18
|
SW
19
|
SW
21
|
SW
21
|
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 |
|---|---|---|---|---|---|---|---|---|
| 600m | 41 | 42 | 47 | 50 | 51 | 54 | 56 | 55 |
| 300m | 24 | 24 | 28 | 32 | 36 | 38 | 41 | 40 |
| Valley | 25 | 24 | 28 | 31 | 35 | 37 | 39 | 38 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
2°
|
2°
|
2°
|
2°
|
4°
|
5°
|
5°
|
6°
|
| 300m |
3°
|
3°
|
3°
|
4°
|
6°
|
7°
|
8°
|
8°
|
| Valley |
4°
|
4°
|
4°
|
5°
|
7°
|
8°
|
9°
|
9°
|
| Freezing Level |
1,000m
|
1,000m
|
1,100m
|
1,300m
|
1,700m
|
2,200m
|
2,800m
|
2,900m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-5°
|
-6°
|
-6°
|
-5°
|
-3°
|
-2°
|
-1°
|
0°
|
| 300m |
-1°
|
-2°
|
-2°
|
-1°
|
2°
|
2°
|
3°
|
3°
|
| Valley |
0°
|
0°
|
0°
|
1°
|
3°
|
4°
|
5°
|
5°
|
Additional weather information
Meteorologist's view
Strong winds with a risk of summit gales will make for difficult walking conditions with a risk of being blown over in stronger gusts. Rain and strong winds will give a notable wind chill despite the high freezing level.
Weather
Mainly dry and clear overnight with a sunny start to the day, although patchy summit cloud possible. Cloud increasing during the morning with patchy rain during the afternoon, turning more persistent late evening. Strengthening southwest winds with a risk of summit gales in the afternoon.
Chance of cloud-free hill tops
90% falling 30% in the afternoon and nil in the evening.
Low cloud and visibility
Very good visibility with no cloud on the hills at first. Cloud lowering to 600m around midday, then extensive cloud down to 400m in the afternoon and evening, occasionally lower in southern slopes.
Mountain weather information
Weather
A poor day expected with heavy and persistent rain likely throughout, leading to swollen or flooded water courses along with summit gales and navigational difficulties.
Chance of cloud-free hill tops
Nil.
Maximum wind speed expected
Southwest 40 gusting 65 mph, increasing to 55 gusting 65 mph in the evening.
Temperature
- At 700m Plus 5 or 6 Celsius.
- Valley Plus 8 to 11 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Very poor visibility in persistent extensive low cloud, base 200 to 500m.
Mountain weather information
Mon 15 Dec
Sunrise:
Sunset:
A wet start with a continued risk of swollen or flooded water courses. Becoming mainly dry and bright during daylight hours with some sunny spells possible. Winds mainly light or moderate from the west or northwest.
Tue 16 Dec
Sunrise:
Sunset:
Mainly dry with bright or clear spells. Light or moderate west or southwest winds at height. Freezing level near or above the summits.
Wed 17 Dec
Sunrise:
Sunset:
Dry overnight. Otherwise cloudy with outbreaks of rain, heavy and persistent at times. South or southwest winds strong to gale force at height.
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 Mourne Mountains are a granite mountain range in County Down in the southeast of Northern Ireland, is an area of outstanding natural beauty, and has been proposed as the first National Park in Northern Ireland.