Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
Moderate or low confidence until Sunday morning. Then high confidence for a transition to cooler, more settled but at times showery weather from Sunday.
This evening forecast
Cloudy with some patchy mostly light rain at first. Becoming dry with variable amounts of cloud through the evening. Visibilities will be moderate or poor in low cloud down to 400-600m and outbreaks of rain. Strong southwest winds gusting 45-55mph on the summits.
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.
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
Cloudy with outbreaks of rain at times. Strong southwest winds easing.
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
Weather (at 700m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 700m) |
60% | 40% | 40% | 50% | 60% | 80% | 60% | 40% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
SW
29
|
SW
26
|
SW
20
|
SW
14
|
SW
11
|
W
13
|
W
12
|
W
13
|
| 300m |
SW
14
|
SW
13
|
SW
7
|
SW
7
|
SW
7
|
W
7
|
W
5
|
W
6
|
| Valley |
SW
11
|
SW
11
|
SW
7
|
SW
6
|
SW
7
|
SW
6
|
W
4
|
W
5
|
Wind gust (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m | 40 | 36 | 28 | 18 | 15 | 18 | 16 | 19 |
| 300m | 25 | 24 | 16 | 12 | 12 | 13 | 10 | 13 |
| Valley | 24 | 23 | 18 | 13 | 13 | 13 | 9 | 12 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
13°
|
11°
|
10°
|
10°
|
11°
|
11°
|
10°
|
9°
|
| 300m |
14°
|
13°
|
12°
|
13°
|
13°
|
13°
|
12°
|
11°
|
| Valley |
15°
|
14°
|
13°
|
14°
|
15°
|
14°
|
13°
|
12°
|
| Freezing Level |
3,100m
|
3,000m
|
2,700m
|
2,500m
|
2,500m
|
2,200m
|
2,200m
|
2,200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
8°
|
7°
|
7°
|
8°
|
9°
|
8°
|
8°
|
7°
|
| 300m |
12°
|
11°
|
11°
|
12°
|
12°
|
12°
|
12°
|
10°
|
| Valley |
14°
|
13°
|
12°
|
13°
|
14°
|
14°
|
13°
|
11°
|
Additional weather information
Meteorologist's view
Chance of summit gales in the early hours where windy conditions will make for fairly arduous walking on exposed terrain with buffeting of clothing. Balance may be affected at times.
Weather
A front waving close to the Mournes throughout the day will bring often cloudy conditions with outbreaks of mostly light rain or drizzle at times, but some heavier bursts possible. Strong southwest winds at first with chance of summit gales in the early hours, but easing down through the day.
Chance of cloud-free hill tops
40% or less.
Low cloud and visibility
Considerable areas of cloud down to 500-700m at times as the front waves over the region. Clearer breaks also at times. Visibilities fall moderate or poor in persistent cloud and light rain or drizzle, occasionally falling very poor in any heavier rain.
Mountain weather information
Weather
Dry morning with some bright spells. Perhaps a few showers through the middle of the day before more persistent and heavier rain is likely later with the small chance of lightning and thunder.
Chance of cloud-free hill tops
80% falling to 40% in the late afternoon
Maximum wind speed expected
Light and variable at first, becoming north up to 50-55mph on the summits through the afternoon and evening.
Temperature
- At 700m Plus 4 to plus 7 Celsius.
- Valley Plus 10 rising to plus 14 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Largely clear summits and good visibilities in the morning with only patches of cloud around 500-700m. Cloud becomes more widespread from late afternoon and visibilities falling poor or very poor in rain, heavy at times.
Mountain weather information
Sun 21 Sep
Sunrise:
Sunset:
Cooler - cold on the summits. Bright spells and showers. Strong northerly winds. Freezing level down to 1200-1400m.
Mon 22 Sep
Sunrise:
Sunset:
Mostly dry and bright, chance of the odd light shower. Staying cool, severe wind chill at height. Fresh to strong northerly winds at first, easing. Freezing level around 1000m at first, rising to 1500m later.
Tue 23 Sep
Sunrise:
Sunset:
Staying mostly dry and bright, chance of the odd light shower. Staying cool, severe wind chill at height. Moderate northerly winds. Freezing level around 1300m.
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.