Mountain weather

Mourne Mountains

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Mourne Mountains Mountain weather forecast table

Confidence

High for generally showery conditions through Friday and early Saturday, but lower for timing and intensity of rainfall. Also high for largely dry and fine weather from Saturday afternoon.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

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

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

Frequent showers through the day, some heavy and thundery.

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

Bright or sunny spells to start the day, though some mist and fog at low levels and cloud will thicken from the south through the morning to bring scattered showers, these turning heavy with a risk of hail and thunder but there will be a few bright or sunny spells inbetween. Showers largely dying away after dusk with then some clear spells but further heavy showers likely from mid-evening.

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

80% falling to 50% with hill fog around 700m, but mostly in and around showers.

Visibility

Very good outside of showers, but temporarily falling to a kilometre or so during heavier showers.

Meteorologist's view

Some heavy showers with a risk of thunderstorms. Freshening winds through the afternoon.

Sunrise:
Sunset:

Mountain weather information

Weather

Clear spells through the morning but turning cloudier from dawn as a band of cloud and scattered showers sinks southwards. Largely dry and sunny thereafter but a risk of the odd shower remains.

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

60% through the morning with patchy hill fog around 600m, but improving closer to 90% from mid morning.

Maximum wind speed expected

Northerly 20mph gusting 30mph.

Temperature

  • At 700m Plus 5
  • Valley Plus 5 rising to 11.
  • Freezing level Above summits.

Visibility

Very good with some far reaching views on offer outside of hill fog. Perhaps falling briefly in any showers but all summits should remain visible throughout.

Mountain weather information

Sunday 20 October

Sunrise:
Sunset:

Fresh northerly winds slowly easing through the afternoon with bright or sunny conditions. Very low risk of an afternoon shower. Freezing level above summits.

Monday 21 October

Sunrise:
Sunset:

A chilly start likely with some mist possible in the valleys. Morning sunshine will turn hazy through the day but it will remain dry and fine. Freezing level above summits.

Tuesday 22 October

Sunrise:
Sunset:

Cloudy but dry and bright with moderate southwest winds. Freezing level above 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