Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High confidence for overall setup and for an unsettled couple of days before high pressure builds from Tuesday.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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.
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.
Mountain weather forecast
Heavy rain in the morning with gales. Drier with bright spells in the afternoon.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
20% | <05% | <05% | <05% | 40% | 60% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
S
31
|
SE
22
|
SE
17
|
E
18
|
E
19
|
E
20
|
| 300m |
SE
15
|
SE
11
|
SE
10
|
E
10
|
E
11
|
E
11
|
| Valley |
SE
12
|
SE
10
|
SE
9
|
E
8
|
E
9
|
E
9
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 42 | 30 | 23 | 24 | 27 | 27 |
| 300m | 27 | 21 | 17 | 17 | 19 | 19 |
| Valley | 26 | 21 | 16 | 16 | 18 | 18 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
5°
|
5°
|
5°
|
5°
|
4°
|
5°
|
| 300m |
7°
|
6°
|
7°
|
7°
|
6°
|
7°
|
| Valley |
8°
|
7°
|
8°
|
8°
|
8°
|
8°
|
| Freezing Level |
1,300m
|
1,200m
|
1,200m
|
1,200m
|
1,300m
|
1,400m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-2°
|
-1°
|
0°
|
0°
|
-1°
|
0°
|
| 300m |
3°
|
3°
|
4°
|
4°
|
3°
|
4°
|
| Valley |
5°
|
5°
|
6°
|
6°
|
5°
|
5°
|
Additional weather information
Meteorologist's view
Strong winds with a risk of gales in the morning may make for difficult walking conditions. Low cloud for much of the day so tricky navigation. Feeling cold.
Weather
Heavy rain through the early hours but becoming dry later Sunday morning. Mostly dry in the afternoon with a few brief bright spells before rain arrives in the evening. Strong winds with risk of gales at first but gradually easing.
Chance of cloud-free hill tops
40%- best chance during daylight hours.
Low cloud and visibility
Extensive low cloud in the early hours down to 400-600m. Low cloud breaking up through the morning with occasional cloud bases down to 500-700m and some brighter spells. Cloud lowering and thickening again in the evening. Visibility good outside of cloud, deteriorating further in rain.
Mountain weather information
Weather
Cloudy with outbreaks of rain in the morning. Staying cloudy but mostly dry through the afternoon and evening. Light, occasionally fresh, southeasterly winds. Marked wind chill in higher routes.
Chance of cloud-free hill tops
20%.
Maximum wind speed expected
Southeasterly 15-25mph gusting 25-30mph.
Temperature
- At 700m Plus 5 Celsius.
- Valley Plus 8 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Low cloud with base 500-700m for much of the day, this most widespread in the morning but a few breaks possible in the afternoon. Bases may fall to 300m in the morning. Visibility good outside of cloud and rain, otherwise poor.
Mountain weather information
Tue 23 Dec
Sunrise:
Sunset:
High pressure building. Cloudy with outbreaks of light rain. Light easterly winds. Freezing level above summits.
Wed 24 Dec
Sunrise:
Sunset:
Dry with bright spells. Moderate easterly winds. Freezing level 800m.
Thu 25 Dec
Sunrise:
Sunset:
Mostly cloudy and dry. Moderate easterly winds. Freezing level 500m.
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.