Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for changeable weather to continue this weekend. Increasing confidence for somewhat drier weather early next week.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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.
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
Bright with showers
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
20% | 30% | 40% | 30% | 20% | 10% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
W
22
|
SW
16
|
SW
14
|
SW
11
|
W
14
|
W
18
|
| 300m |
W
9
|
SW
9
|
SW
8
|
SW
9
|
W
8
|
W
9
|
| Valley |
W
9
|
SW
7
|
SW
7
|
SW
8
|
W
6
|
W
8
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 30 | 23 | 20 | 15 | 20 | 25 |
| 300m | 17 | 15 | 14 | 14 | 13 | 18 |
| Valley | 20 | 15 | 13 | 14 | 13 | 17 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
8°
|
8°
|
10°
|
11°
|
12°
|
10°
|
| 300m |
10°
|
12°
|
13°
|
14°
|
14°
|
12°
|
| Valley |
11°
|
13°
|
15°
|
15°
|
15°
|
13°
|
| Freezing Level |
1,900m
|
1,900m
|
2,000m
|
2,200m
|
2,100m
|
2,200m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
3°
|
5°
|
7°
|
8°
|
9°
|
6°
|
| 300m |
8°
|
10°
|
12°
|
12°
|
13°
|
10°
|
| Valley |
9°
|
12°
|
14°
|
14°
|
14°
|
12°
|
Additional weather information
Meteorologist's view
Nothing to add
Weather
Variable cloud cover and passing showers through the day, some drier interludes too. Becoming mainly dry through the evening.
Chance of cloud-free hill tops
80%
Low cloud and visibility
Generally very good with good air clarity. Some patchy cloud around 600 metres at first otherwise cloud mostly above summits.
Mountain weather information
Weather
Variable cloud cover and some sunny intervals. Chance of a few passing showers although these becoming less frequent in the afternoon. Feeling rather chilly under cloud cover on the tops in the brisk westerly winds.
Chance of cloud-free hill tops
80%
Maximum wind speed expected
Westerly gusts to 25 mph on the summits
Temperature
- At 700m Plus 9 Celsius
- Valley Plus 8 rising to 18 Celsius
- Freezing level Above summits
Low cloud and visibility
Areas of low cloud down to 600 metres at first, otherwise cloud above summits
Mountain weather information
Mon 4 Jul
Sunrise:
Sunset:
Some bright or sunny intervals, mainly dry. Strong westerly winds at height.
Tue 5 Jul
Sunrise:
Sunset:
Mostly cloudy, chance of a little rain at first. Strong northwesterly winds at height.
Wed 6 Jul
Sunrise:
Sunset:
Chance of some rain at first, otherwise a cloudy and mainly dry day.
Updated at:
Summit specific forecast
Mountain summit forecast map
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Key
Mountain summits
Other points of interest
Cluster of multiple stations
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.v