Mountain weather

Mourne Mountains

Mourne Mountains Mountain weather forecast table

Confidence

High for the cold weather to continue. Lower for cloud and snow shower detail.

Sunrise:
Sunset:

This evening forecast

A dry evening with some clear spells, but the chance of low level fog patches developing. Moderate northwest breeze on tops and freezing at most levels.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.

hazard 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.
hazard 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

A dry day with variable cloud and some bright or sunny spells. Perhaps some low cloud and fog patches.

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 700m)
Clear night Partly cloudy (night) Clear night Sunny day Sunny intervals Fog Clear night Cloudy
Chance of precipitation
(at 700m)
<05% <05% <05% <05% <05% 10% <05% <05%

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 NW
16
NW
20
NW
20
NW
20
NW
19
NW
17
NW
17
W
19
300m N
10
NW
12
NW
12
NW
13
NW
13
NW
10
NW
9
W
9
Valley N
9
NW
11
NW
11
NW
12
NW
12
NW
10
NW
9
W
8
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 22 28 29 29 28 24 25 28
300m 17 21 22 22 23 18 18 18
Valley 17 20 20 21 21 18 18 18

Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
-2°
-3°
-3°
-3°
-2°
-2°
-2°
-3°
300m
-1°
-1°
-2°
-2°
-1°
-1°
Valley
-1°
-1°
-1°
Freezing Level
100m
100m
100m
100m
200m
300m
300m
300m

Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
-8°
-10°
-10°
-10°
-9°
-9°
-9°
-10°
300m
-5°
-6°
-7°
-7°
-5°
-4°
-5°
-6°
Valley
-4°
-6°
-6°
-6°
-4°
-3°
-4°
-4°

Additional weather information

Meteorologist's view

Low cloud and fog the main uncertainty over the next couple of days.

Weather

Dry with mainly clear skies over the higher hills, increasing chance of low cloud, mist or freezing fog at lower levels especially in the north. Some sunshine on Friday, especially in the morning on the upper slopes, but low cloud, giving some fog at low levels in the north, likely to rise up the slopes to bring an increased chance of hill fog in the afternoon, though could well stay clear to the south of the hills.

Chance of cloud-free hill tops

80% falling 30%

Low cloud and visibility

Areas of low cloud below 400m in the north this tending to lift up to between 400 and 700m, probably clear to the south of the hills. Very poor visibility in cloud and fog but away from that generally good.

Sunrise:
Sunset:

Mountain weather information

Weather

Another generally dry day, with some bright or sunny spells, mainly in the south. Fog and low cloud probable in the north. Chance of one or two light snow showers later in the evening.

Chance of cloud-free hill tops

40%

Maximum wind speed expected

North or northwest 10-15mph.

Temperature

  • At 700m Minus 4 Celsius
  • Valley Minus 3 Celsius rising to Plus 2 at best
  • Freezing level All levels

Low cloud and visibility

Again the chance of some fog or freezing fog at low levels especially to the north of the hills and perhaps up to 600m in the north,

Mountain weather information

Sun 11 Dec

Sunrise:
Sunset:

Clear or sunny spells and scattered showers, these mainly of snow but rain nearer the coast at low levels. Freezing level 300m or less. Light winds/

Mon 12 Dec

Sunrise:
Sunset:

A mainly dry day with some longer sunny spells, and just the chance of a passing light snow shower. Freezing level 300m with a fresh easterly wind.

Tue 13 Dec

Sunrise:
Sunset:

Again mainly dry and bright but cold with a stronger east or southeast wind, freezing level around 300m

Updated at:

Summit specific forecast

Mountain summit forecast map

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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