Mountain weather

Mourne Mountains

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Mourne Mountains Mountain weather forecast table

Confidence

High confidence for mainly dry and increasingly warm conditions through the week.

This evening forecast

Sunrise:
Sunset:

Scattered showers at first, locally heavy, will die out. Patchy low cloud cover becoming more extensive by midnight. Light winds.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

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

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 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

Low cloud slowly lifting. Mainly dry with light winds.

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

Mainly dry and cloudy overnight. A cloudy and misty start but bright or sunny intervals slowly breaking through. Staying mainly dry but isolated showers will develop, these dying out from late afternoon with lengthening sunny or clear spells.

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

10% overnight and at first in morning with extensive cloud above 400 or 500m and ragged patches on lower slopes. Improving to 80% by early afternoon as cloud slowly lifts off the summits.

Visibility

Below the cloud base, conditions generally hazy or misty at first but improving to good or slightly hazy by afternoon.

Meteorologist's view

Valley temperatures may reach 20 or 21 Celsius in the afternoon. Feeling warm and humid on the ascents.

Sunrise:
Sunset:

Mountain weather information

Weather

Patchy low cloud early morning, quickly clearing. A dry day with increasing amounts of warm sunshine. Feeling very warm on the ascents.

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

40% overnight and early morning with patchy cloud cover above 500m. Soon improving to 90% through the morning as any cloud lifts above the summits.

Maximum wind speed expected

East or Northeast, 10-15mph.

Temperature

  • At 700m Plus 9C rising to 13 or 14C.
  • Valley Plus 13C rising to 19-22C.
  • Freezing level Well above summits.

Visibility

Good, but a slight haze may obscure distant hills.

Mountain weather information

Thursday 27 June

Sunrise:
Sunset:

Early summit cloud clearing then dry and sunny with light easterly winds. Very warm at low elevations.

Friday 28 June

Sunrise:
Sunset:

Another dry and sunny days and feeling very warm. A fresh southeasterly breeze on the tops.

Saturday 29 June

Sunrise:
Sunset:

Increasing cloud with showers or thunderstorms likely to arrive from the west. Continuing to feel very warm and humid. Fresh southerly winds on the tops.

Updated at:

Summit specific forecast map

Summit specific forecasts for Mourne Mountains

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