Mountain weather

Mourne Mountains

Mourne Mountains Mountain weather forecast table

Confidence

High for changeable weather to continue this weekend. Increasing confidence for somewhat drier weather early next week.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

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

hazard 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.

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.
hazard Thunderstorms
Lightning is a significant mountain hazard which can result in serious injury or death. Mountain terrain often leaves one highly exposed to lightning strikes. Hail may give unpleasant conditions with torrential rain and localised flash flooding also possible, mainly in Summer months.

Mountain weather forecast

Bright with showers

06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 700m)
Sunny intervals Light shower (day) Heavy shower (day) Light shower (day) Sunny intervals Sunny intervals
Chance of precipitation
(at 700m)
20% 30% 40% 30% 20% 10%

Wind direction and speed (mph)
Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m W
22
SW
16
SW
14
SW
11
W
14
W
18
300m W
9
SW
9
SW
8
SW
9
W
8
W
9
Valley W
9
SW
7
SW
7
SW
8
W
6
W
8
Wind gust (mph)
Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m 30 23 20 15 20 25
300m 17 15 14 14 13 18
Valley 20 15 13 14 13 17

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
10°
11°
12°
10°
300m
10°
12°
13°
14°
14°
12°
Valley
11°
13°
15°
15°
15°
13°
Freezing Level
1,900m
1,900m
2,000m
2,200m
2,100m
2,200m

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
10°
12°
12°
13°
10°
Valley
12°
14°
14°
14°
12°

Additional weather information

Meteorologist's view

Nothing to add

Weather

Variable cloud cover and passing showers through the day, some drier interludes too. Becoming mainly dry through the evening.

Chance of cloud-free hill tops

80%

Low cloud and visibility

Generally very good with good air clarity. Some patchy cloud around 600 metres at first otherwise cloud mostly above summits.

Sunrise:
Sunset:

Mountain weather information

Weather

Variable cloud cover and some sunny intervals. Chance of a few passing showers although these becoming less frequent in the afternoon. Feeling rather chilly under cloud cover on the tops in the brisk westerly winds.

Chance of cloud-free hill tops

80%

Maximum wind speed expected

Westerly gusts to 25 mph on the summits

Temperature

  • At 700m Plus 9 Celsius
  • Valley Plus 8 rising to 18 Celsius
  • Freezing level Above summits

Low cloud and visibility

Areas of low cloud down to 600 metres at first, otherwise cloud above summits

Mountain weather information

Mon 4 Jul

Sunrise:
Sunset:

Some bright or sunny intervals, mainly dry. Strong westerly winds at height.

Tue 5 Jul

Sunrise:
Sunset:

Mostly cloudy, chance of a little rain at first. Strong northwesterly winds at height.

Wed 6 Jul

Sunrise:
Sunset:

Chance of some rain at first, otherwise a cloudy and mainly dry day.

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