Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High confidence for rain and stronger winds for a time on Saturday before turning more settled. High confidence for dry and settled conditions set to persist into next week.
This evening forecast
Mostly cloudy with some clearer intervals this evening. Fresh to strong southwesterly winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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.
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
Sunny spells and a few showers. Winds easing through the day. Cold on higher routes.
| 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% | 30% | 40% | 40% | 00% | 00% |
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
25
|
W
29
|
W
28
|
NW
22
|
W
21
|
NW
20
|
NW
16
|
NW
18
|
| 300m |
SW
11
|
W
14
|
W
13
|
NW
14
|
NW
14
|
NW
13
|
NW
10
|
NW
9
|
| Valley |
SW
10
|
W
12
|
W
11
|
NW
13
|
NW
12
|
NW
11
|
NW
9
|
NW
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 |
|---|---|---|---|---|---|---|---|---|
| 600m | 35 | 41 | 40 | 32 | 30 | 29 | 22 | 25 |
| 300m | 21 | 26 | 26 | 24 | 23 | 22 | 18 | 17 |
| Valley | 22 | 25 | 25 | 23 | 22 | 21 | 18 | 14 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
3°
|
5°
|
5°
|
6°
|
5°
|
3°
|
| 300m |
6°
|
6°
|
5°
|
8°
|
8°
|
9°
|
8°
|
4°
|
| Valley |
7°
|
7°
|
6°
|
9°
|
10°
|
10°
|
9°
|
5°
|
| Freezing Level |
1,100m
|
1,200m
|
1,000m
|
1,000m
|
1,100m
|
1,000m
|
1,000m
|
900m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-2°
|
-3°
|
-3°
|
-1°
|
0°
|
1°
|
0°
|
-2°
|
| 300m |
3°
|
2°
|
1°
|
4°
|
5°
|
6°
|
5°
|
1°
|
| Valley |
4°
|
3°
|
3°
|
6°
|
7°
|
8°
|
7°
|
3°
|
Additional weather information
Meteorologist's view
Low cloud in the morning may make for tricky navigation, with strong winds making for slow progress, but these easing later. Cloud bases lifting in the afternoon but showers possible. Cold on higher routes.
Weather
Bright or sunny spells with scattered showers through much of the day. Drier in the evening with long clear periods developing. Strong southwesterly winds becoming fresh northwesterlies later.
Chance of cloud-free hill tops
10% early morning, then increasing to 95%.
Low cloud and visibility
Widespread low cloud with base around 500m through early morning. Cloud then starting to lift and break, some 800-1000m bases lingering through the afternoon, mainly near showers, before rising above summits. Visibility poor in cloud and rain, otherwise good.
Mountain weather information
Weather
Fog patches in the valleys at first but these soon clearing after dawn to leave a dry day with patchy cloud and long sunny spells. Light or moderate northwesterly winds. Chilly on higher routes.
Chance of cloud-free hill tops
100%.
Maximum wind speed expected
Northwest 15-20mph.
Temperature
- At 700m Between 0 and plus 1C.
- Valley Plus 3C in the morning, rising to Plus 10C in the afternoon.
- Freezing level 800-1000m.
Low cloud and visibility
A little fog in the valleys at first but this soon clearing with any cloud above summits for the rest of the day. Visibility poor in fog, otherwise good.
Mountain weather information
Mon 20 Apr
Sunrise:
Sunset:
Dry with sunny spells. Light to moderate northeasterly winds. Freezing level 800-1000m.
Tue 21 Apr
Sunrise:
Sunset:
Dry and mostly sunny. Fresh to strong northeasterly winds may be strong on highest routes. Freezing level 800-1000m.
Wed 22 Apr
Sunrise:
Sunset:
Dry with sunny spells. Strong winds at times. Freezing level 800-1000m.
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.