Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for an unsettled and often windy few days. Low for exact wind strength on Tuesday. More broadly low confidence for Thursday and Friday.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.
Severe Chill Effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
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
A mostly dry day with sunny spells. Strong winds in the morning.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
10% | <05% | <05% | 10% | <05% | 30% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
SW
36
|
SW
37
|
SW
30
|
SW
26
|
SW
24
|
S
20
|
| 300m |
SW
13
|
SW
14
|
SW
14
|
SW
11
|
SW
10
|
S
8
|
| Valley |
SW
11
|
SW
11
|
SW
10
|
SW
9
|
SW
8
|
S
6
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 49 | 51 | 40 | 36 | 33 | 27 |
| 300m | 27 | 28 | 24 | 22 | 20 | 16 |
| Valley | 27 | 28 | 22 | 21 | 19 | 16 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
4°
|
4°
|
4°
|
5°
|
6°
|
6°
|
| 300m |
6°
|
5°
|
7°
|
8°
|
7°
|
8°
|
| Valley |
7°
|
6°
|
8°
|
9°
|
8°
|
8°
|
| Freezing Level |
1,200m
|
1,200m
|
1,300m
|
1,400m
|
1,400m
|
1,600m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-3°
|
-4°
|
-2°
|
0°
|
1°
|
1°
|
| 300m |
2°
|
1°
|
3°
|
5°
|
5°
|
5°
|
| Valley |
4°
|
3°
|
5°
|
6°
|
6°
|
7°
|
Additional weather information
Meteorologist's view
Wet conditions underfoot and feeling cold in the wind, especially during the morning.
Weather
A dry morning with sunny spells, but strong winds across the tops. Cloud increases in the afternoon with an outside chance of a light shower, but most likely staying dry. Cloud lowering in the evening with heavy rain by midnight.
Chance of cloud-free hill tops
60%.
Low cloud and visibility
Mostly very good visibility with some patchy cloud above 500-600m, becoming more frequent in the afternoon and evening.
Mountain weather information
Weather
Heavy rain in the early hours, turning lighter and patchy in the morning. Largely dry with bright then sunny spells in the afternoon. Clear spells in the evening. Strong winds with a risk of summit gales at times.
Chance of cloud-free hill tops
Nil early morning, improving to 80% by late morning.
Maximum wind speed expected
South becoming southwest 35 gusting 45-50 mph.
Temperature
- At 700m Plus 10 Celsius, falling to plus 6 Celsius in the afternoon.
- Valley Plus 4 Celsius rising to 13 Celsius.
- Freezing level Well above the summits.
Low cloud and visibility
Very poor visibility in rain and cloud to start, bases down to lower slopes. Visibility becoming very good by late morning as cloud lifts above the tops, occasionally dropping to 800m.
Mountain weather information
Wed 10 Dec
Sunrise:
Sunset:
A dry, bright and breezy day with fresh west or southwest summit winds.
Thu 11 Dec
Sunrise:
Sunset:
Large uncertainty, but likely to see strong winds and a risk of gales for a time. Mostly dry, but a chance rain could affect the area for a time.
Fri 12 Dec
Sunrise:
Sunset:
Most likely dry bright and breezy with fresh southerly winds, but large uncertainty.
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.