Mountain weather

Mourne Mountains

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Mourne Mountains Mountain weather forecast table

Confidence

High for a mainly dry week but lower for daily cloud detail. Low for any breakdown on Saturday.

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.

Mountain weather forecast

Dry with sunny spells.

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

Chilly start in the valleys with perhaps the odd fog patch. The day then dry with some spells of sunshine, and some fair weather cloud above the tops developing from late morning.

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

More than 95%

Visibility

Excellent with distant hills easily seen.

Meteorologist's view

Valley temperatures could be much lower in a few spots around dawn.

Sunrise:
Sunset:

Mountain weather information

Weather

Another dry day with little in the way of cloud, and if there is any, it will be above the tops. So some long sunny spells.

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

95% or more.

Maximum wind speed expected

Westerly 15-20mph.

Temperature

  • At 700m Plus 7 at midnight rising to Plus 11 in the afternoon.
  • Valley Plus 2 at dawn rising to plus 17 in the afternoon.
  • Freezing level Above the summits.

Visibility

Very good though perhaps some shallow valley fog patches at night.

Mountain weather information

Thursday 19 September

Sunrise:
Sunset:

Another fine sunny day. Light winds

Friday 20 September

Sunrise:
Sunset:

Low cloud burning off then a fine dry day with long spells of unbroken sunshine. Winds turning southeasterly and strengthening on the tops. Warm.

Saturday 21 September

Sunrise:
Sunset:

Early low cloud on southern foothills clearing then some sunny spells. Perhaps the chance of some showery rain edging in from the west. Warm, but southeasterly gales on the 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