Mountain weather
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.
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.
Mountain weather forecast
Dry with sunny spells.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
00% | 00% | 00% | 00% | 00% | 00% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
NW
24
|
NW
15
|
NW
10
|
NW
10
|
N
7
|
E
4
|
| 300m |
NW
9
|
NW
9
|
NW
7
|
NW
7
|
N
3
|
E
4
|
| Valley |
NW
8
|
NW
7
|
NW
6
|
N
6
|
N
3
|
E
2
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 35 | 21 | 15 | 16 | 11 | 6 |
| 300m | 21 | 15 | 12 | 12 | 7 | 6 |
| Valley | 20 | 14 | 12 | 12 | 8 | 6 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
7°
|
7°
|
9°
|
10°
|
9°
|
8°
|
| 300m |
8°
|
10°
|
12°
|
13°
|
12°
|
9°
|
| Valley |
9°
|
11°
|
13°
|
14°
|
13°
|
10°
|
| Freezing Level |
1,500m
|
1,500m
|
1,600m
|
2,100m
|
2,700m
|
3,000m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
2°
|
3°
|
6°
|
8°
|
8°
|
7°
|
| 300m |
5°
|
8°
|
10°
|
12°
|
11°
|
8°
|
| Valley |
7°
|
10°
|
12°
|
13°
|
12°
|
9°
|
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.
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
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