Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for Tuesday but Low for Wednesday for the extent of showers so please keep up to date with the forecast. High for generally more settled weather later in the 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 spells and showers. Light winds.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
Chance of precipitation (at 700m) |
10% | 20% | 30% | 30% | 30% | 10% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
SE
14
|
SE
12
|
SE
9
|
SE
7
|
S
4
|
W
6
|
| 300m |
E
7
|
SE
8
|
SE
7
|
SE
6
|
S
4
|
W
3
|
| Valley |
E
5
|
SE
7
|
SE
7
|
SE
6
|
S
4
|
NW
2
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 21 | 17 | 12 | 10 | 6 | 9 |
| 300m | 13 | 12 | 10 | 9 | 6 | 5 |
| Valley | 11 | 11 | 10 | 9 | 6 | 5 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
10°
|
10°
|
11°
|
12°
|
12°
|
10°
|
| 300m |
12°
|
13°
|
13°
|
15°
|
14°
|
12°
|
| Valley |
13°
|
14°
|
15°
|
16°
|
15°
|
12°
|
| Freezing Level |
2,300m
|
2,200m
|
2,200m
|
2,200m
|
2,200m
|
2,200m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
7°
|
8°
|
9°
|
11°
|
11°
|
9°
|
| 300m |
10°
|
11°
|
12°
|
14°
|
14°
|
11°
|
| Valley |
12°
|
13°
|
14°
|
15°
|
15°
|
12°
|
Additional weather information
Meteorologist's view
Feeling rather warm and in the afternoon in sheltered valleys with highs of 18 or 19 Celsius.
Weather
A rather cloudy start but brightening up through the day with some sunny spells. A few showers may develop, perhaps heavy with a small chance of thunder, but these will be mainly staying to the west of the Mourne Mountains.
Chance of cloud-free hill tops
80%.
Low cloud and visibility
Mainly good visibility but showers will bring some temporary reductions with patchy cloud above 600m in the afternoon and evening.
Mountain weather information
Weather
Cloudier than of late with showers developing, some possibly heavy and thundery. Breezy on the tops.
Chance of cloud-free hill tops
60%.
Maximum wind speed expected
Northerly 10mph becoming Northwesterly 15 to 20mph gusts 30mph.
Temperature
- At 700m Plus 10 or 11C.
- Valley 11C rising to 17 or 18C.
- Freezing level Above summits.
Low cloud and visibility
Areas of cloud and fog above about 700m at first, lifting and becoming patchy for a time during the day. Poor visibility at times in showers, and perhaps for longer periods in rain.
Mountain weather information
Thu 23 May
Sunrise:
Sunset:
Mainly cloudy with the odd shower at first but becoming dry with increasing amounts of sunshine. Feeling cool with fresh northwesterly winds on the tops.
Fri 24 May
Sunrise:
Sunset:
Dry and bright with sunny spells and light winds.
Sat 25 May
Sunrise:
Sunset:
Mainly dry with sunny spells and light winds. Some rain may arrive towards the end of the 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.