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Mourne Mountains - Mountain weather forecast

Weather warnings

Warnings affecting Mourne Mountains over the next 5 days



  • Saturday
  • Sunday
  • Further outlook

Saturday 20 October 2018

Weather hazards

Poor visibility High likelihood Hide detail

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.

Learn more about poor visibility

Gales Low likelihood Show detail

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.

Learn more about gales

Severe chill effect Low likelihood Show detail

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.

Learn more about severe chill effect


A generally cloudy day with the odd spot of drizzle and some rather persistent hill fog.


06:00 09:00 12:00 15:00 18:00 21:00
Weather at 700m Cloudy Cloudy Cloudy Overcast Overcast Fog
Chance of precipitation at 700m 30% 40% 20% 30% 20% 30%

Wind speed and direction

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m SW 24 32 SW 24 32 SW 22 29 SW 24 31 SW 23 31 SW 22 29
300m SW 8 15 SW 11 18 SW 12 19 SW 12 19 SW 12 19 SW 11 17
Valley S 4 12 SW 7 15 SW 9 16 SW 10 18 SW 9 16 SW 7 14


06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m 8 ° 8 ° 10 ° 10 ° 11 ° 11 °
300m 9 ° 10 ° 11 ° 12 ° 12 ° 12 °
Valley 10 ° 11 ° 12 ° 13 ° 13 ° 13 °

Feels like temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m 4 ° 4 ° 6 ° 7 ° 7 ° 7 °
300m 8 ° 8 ° 9 ° 10 ° 10 ° 10 °
Valley 9 ° 10 ° 11 ° 12 ° 11 ° 12 °

Freezing level

06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 3,500 m 3,500 m 3,300 m 3,300 m 3,300 m 3,400 m
Sunrise: 08:01
Sunset: 18:16
Moon phase: Waxing gibbous


Cloudy, with hill fog and the odd patch of drizzle. Perhaps a few brighter spells to the northeast of the Mournes.

Chance of cloud-free mountain/hill tops at 700m

Less than 10% with a good deal of cloud, some of it with bases below 300m.


Moderate to poor in drizzle and mist.

Meteorologist's view

Some gusts nearer 45mph on the highest summits.

Sunday 21 October 2018

Sunrise: 08:03
Sunset: 18:14
Moon phase: Waxing gibbous


A cloudy morning with some heavier rain for a time. Then brightening up late morning to bring a bright afternoon with some sunshine

Maximum wind speed expected

Southwest 35 gusts 50mph veering northwest from late morning, easing 25 gusts 35mph in the evening.

Chance of cloud-free mountain/hill tops at 700m

Little chance overnight rising 20% in morning as bases rise a little then improving to 90% or more in the afternoon as cloud breaks up well and bases rise.


  • At 700m Plus 11 Celsius falling to Plus 4 by midnight.
  • Valley A mild night no lower than 11 Celsius rising 14 Celsius, then down to Plus 6 by midnight.
  • Freezing level Above the summits.


Moderate to poor becoming good or very good.

Monday 22 October 2018

Sunrise: 08:05
Sunset: 18:11
Moon phase: Waxing gibbous

A dry day. Some good sunny spells in the morning, some cloud building up in the afternoon, this becoming more overcast in the evening perhaps kissing the summits such as Slieve Donard after dark. Strong west to northwest winds.

Tuesday 23 October 2018

Sunrise: 08:07
Sunset: 18:09
Moon phase: Full

Dry, mainly cloudy then brightening up in the afternoon with some sunny intervals. Strong to gale west to northwest winds.

Wednesday 24 October 2018

Sunrise: 08:09
Sunset: 18:07
Moon phase: Full

Cloudier but mainly dry with winds easing.

Issued at:
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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.

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