Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for showery conditions on Monday and Tuesday, and for occasionally unsettled conditions thereafter.
This evening forecast
Windy with the chance of a few passing showers.
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.
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
Bright and breezy with a few showers.
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 700m) |
30% | 30% | 20% | 30% | 30% | 30% | 30% | 20% |
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 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
W
30
|
W
30
|
W
25
|
W
21
|
W
22
|
W
23
|
W
23
|
W
23
|
| 300m |
W
16
|
W
16
|
W
13
|
W
14
|
W
15
|
W
15
|
W
15
|
W
14
|
| Valley |
W
12
|
W
13
|
W
11
|
W
12
|
W
13
|
W
13
|
W
12
|
W
11
|
Wind gust (mph)
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m | 42 | 42 | 36 | 31 | 35 | 35 | 34 | 34 |
| 300m | 29 | 29 | 24 | 25 | 28 | 28 | 27 | 25 |
| Valley | 25 | 26 | 22 | 24 | 27 | 27 | 24 | 22 |
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
8°
|
8°
|
7°
|
9°
|
11°
|
11°
|
10°
|
8°
|
| 300m |
10°
|
10°
|
9°
|
12°
|
14°
|
14°
|
13°
|
11°
|
| Valley |
11°
|
11°
|
10°
|
13°
|
15°
|
15°
|
14°
|
12°
|
| Freezing Level |
1,900m
|
1,900m
|
1,800m
|
1,800m
|
1,800m
|
1,900m
|
1,800m
|
1,800m
|
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
3°
|
3°
|
3°
|
5°
|
7°
|
7°
|
6°
|
4°
|
| 300m |
7°
|
7°
|
7°
|
9°
|
11°
|
11°
|
10°
|
8°
|
| Valley |
9°
|
8°
|
8°
|
11°
|
13°
|
12°
|
12°
|
9°
|
Additional weather information
Weather
Some bright or sunny intervals and the chance of a few passing showers, these most frequent in the afternoon. Some reasonable drier interludes expected too.
Chance of cloud-free mountain/hill tops at 700m
90%, some patchy cloud around 700 metres at first otherwise cloud generally confined to the highest tops.
Visibility
Generally very good with great air clarity outside of cloud and showers.
Meteorologist's view
Notable wind chill in strong winds at height.
Mountain weather information
Weather
Mostly dry and bright in the morning. Turning cloudy in the afternoon with showery rain spreading northeast.
Chance of cloud-free mountain/hill tops at 700m
Most summits clear for much of the day, some patchy cloud around 700 metres.
Maximum wind speed expected
Westerly 20 mph
Temperature
- At 700m Plus 9 Celsius
- Valley Plus 8 rising to 17 Celsius
- Freezing level Above summits
Visibility
Very good with great air clarity outside of showers.
Mountain weather information
Wednesday 21 August
Sunrise:
Sunset:
Wind and rain extending east for a few hours in the afternoon, then drier and clearer by evening.
Thursday 22 August
Sunrise:
Sunset:
Mainly dry, perhaps some light rain rain for a time later.
Friday 23 August
Sunrise:
Sunset:
Dry with some brightness. Light winds.
Updated at:
Summit specific forecast
Mountain summit forecast map
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.
The Mourne Mountains include the highest mountains in Northern Ireland; the highest of these is Slieve Donard standing at 850 metres at the northeastern edge of the Mournes, overlooking Newcastle and Dundrum Bay. At the summit of Slieve Donard there is a cairn and a small stone tower, which is part of the Mourne Wall, which passes over the mountain’s southern and western shoulders.
The Mourne Wall is a 35 kilometre dry stone wall that crosses fifteen summits, constructed between 1904 and 1922 by the Belfast Water Commissioners to define and enclose the catchment area for the newly constructed Silent Valley Reservoir.v