Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High confidence in unsettled conditions on Thursday, but significant uncertainty in day to day detail, especially for extent of any thunderstorm risk on Saturday.
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.
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.
Heavy Persistent Rain
Heavy and persistent rain can lead to drenched clothing and footwear with waterproofs often becoming soaked through, especially if accompanied by strong winds. This can lead to significant loss of body heat and an increased likelihood of hypothermia. Terrain may turn increasingly boggy underfoot while streams can flood and become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.
Mountain weather forecast
Rain spreading north during the morning, heavy at times with risk of thunder.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
30% | 40% | 60% | 70% | 70% | 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 |
SE
22
|
SE
20
|
SE
23
|
SE
23
|
SE
16
|
S
22
|
| 300m |
SE
9
|
E
11
|
E
13
|
SE
11
|
SE
7
|
S
7
|
| Valley |
SE
6
|
E
8
|
E
11
|
SE
9
|
SE
6
|
S
6
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 31 | 28 | 32 | 32 | 21 | 31 |
| 300m | 18 | 18 | 22 | 19 | 13 | 15 |
| Valley | 16 | 17 | 22 | 18 | 12 | 15 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
13°
|
11°
|
11°
|
11°
|
12°
|
12°
|
| 300m |
14°
|
12°
|
12°
|
13°
|
14°
|
13°
|
| Valley |
14°
|
13°
|
14°
|
14°
|
14°
|
14°
|
| Freezing Level |
3,200m
|
3,300m
|
3,300m
|
3,300m
|
3,100m
|
2,900m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
9°
|
7°
|
7°
|
8°
|
10°
|
8°
|
| 300m |
12°
|
10°
|
10°
|
11°
|
13°
|
12°
|
| Valley |
13°
|
12°
|
12°
|
12°
|
14°
|
13°
|
Additional weather information
Meteorologist's view
Gusts to around 35-45mph on summits will give difficult walking conditions with a risk of being blown over. Heavy rain and poor visibility at times in cloud will add to navigational challenges.
Weather
A dry start to the day but rain quickly spreads north in the morning, this occasionally heavy with the odd rumble of thunder possibe. Remaining rather cloudy in the afternoon with the threat of further thundery showers. Fresh to strong winds at height.
Chance of cloud-free hill tops
25%
Low cloud and visibility
Areas of cloud occasionally lowering onto hills in rain with bases down to 400-500m at times. Visibility will be a few kilometres under cloud bases and deteriorating further in heavier pulses of rain.
Mountain weather information
Weather
Rather cloudy with a few scattered showers, these potentially heavy at times with a low risk of thunder. Some brighter periods possible in the afternoon.
Chance of cloud-free hill tops
40% rising to 60% in the afternoon.
Maximum wind speed expected
Gusting 25-30mph on summits in the afternoon.
Temperature
- At 700m Plus 8 rising 10 Celsius.
- Valley Plus 13 rising 17 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Areas of cloud with bases 500-600m in the morning. These bases breaking up and lifting to summit level through the afternoon. Visibility will be generally good, but briefly dropping to a few kilometres in showers.
Mountain weather information
Sat 14 Jun
Sunrise:
Sunset:
Heavy and thundery showers, rain potentially torrential at times with risk of gusty winds and frequent lightning. Low confidence on details.
Sun 15 Jun
Sunrise:
Sunset:
Variable amounts of cloud and outbreaks of rain, mostly light. Fresh to strong winds on summits.
Mon 16 Jun
Sunrise:
Sunset:
Bright or sunny spells and the odd scattered shower. Fresh to strong summit winds.
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.