Mountain weather

Mourne Mountains

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Mourne Mountains Mountain weather forecast table

Confidence

High for largely dry cold and settled weather Thursday and Friday. Moderate for a gradually change to more unsettled conditions over the weekend before improving on Monday, but low for details.

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.

Mountain weather forecast

Cold dry and sunny, breezy in the tops.

Wind direction and speed (mph)
Altitude above mean sea level
Wind gust (mph)
Altitude above mean sea level

Altitude above mean sea level

Altitude above mean sea level

Additional weather information

Weather

Cloud will break up soon after dawn to leave a dry fine day with plenty of sunshine, but feeling cold in fresh northerly winds. Clear skies overnight.

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

80-90%, patchy cloud mainly above 600m around dawn, but soon dispersing. Little if any cloud for the rest of the day.

Visibility

Very good or excellent outside of any early morning cloud.

Meteorologist's view

Feeling bitterly cold where exposed to fresh northerly winds.

Sunrise:
Sunset:

Mountain weather information

Weather

Clear skies overnight with a frost forming in sheltered valleys. Then a fine dry day with plenty of sunshine, but feeling cold in strong winds, especially in the morning. Clear skies in the evening, but high cloud overnight.

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

90% or more, little if any cloud expected.

Maximum wind speed expected

North 30-35 gusting 40 mph, easing to 20-25 mph in the afternoon, 10-15 mph in the evening.

Temperature

  • At 700m Minus 1 Celsius rising to plus 1 Celsius by the afternoon. Falling to minus 2 Celsius evening.
  • Valley Minus 1 Celsius rising to plus 5 Celsius. Falling to minus 2 Celsius in the evening.
  • Freezing level Generally 600m rising to 800-900 in the afternoon, but down to low levels in the valleys early morning and late evening.

Visibility

Very good or excellent.

Mountain weather information

Saturday 16 November

Sunrise:
Sunset:

High cloud thickening and lowering through the day, although likely to stay dry. A chance of light rain or sleet late evening. Light winds. Freezing level 400m rising to 800m in the evening.

Sunday 17 November

Sunrise:
Sunset:

Cloudy with some hill fog and showery outbreaks of rain. Becoming dry with clearing skies late in the day. Freshening northerly winds. Freezing level above the summits.

Monday 18 November

Sunrise:
Sunset:

A cold start then a mostly dry day with some bright or sunny spells possible. Light winds becoming a moderate southerly. Freezing levels likely to be hovering near the higher summits.

Updated at:

Summit specific forecast

Mountain summit forecast map

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