Mountain weather
Mourne Mountains Mountain weather forecast table
Confidence
High for showery conditions over the weekend but lower for details. High for colder but generally dry and bright conditions to start next week.
This evening forecast
A chance of one or two showers but otherwise dry and mostly cloudy. Light southwesterly winds.
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.
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
Bright spells and showers, some heavy. Light winds.
| 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) |
10% | 60% | 60% | 30% | 40% | 40% | 40% | 20% |
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
17
|
SW
12
|
SW
12
|
S
12
|
S
12
|
S
12
|
S
8
|
NE
7
|
| 300m |
SW
7
|
SW
5
|
SW
7
|
S
9
|
S
9
|
S
9
|
S
6
|
NE
5
|
| Valley |
SW
7
|
SW
4
|
S
5
|
S
8
|
S
9
|
S
9
|
S
5
|
E
4
|
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 | 25 | 17 | 16 | 17 | 18 | 18 | 11 | 9 |
| 300m | 15 | 10 | 11 | 13 | 15 | 15 | 9 | 7 |
| Valley | 16 | 10 | 10 | 13 | 15 | 14 | 8 | 7 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
8°
|
6°
|
7°
|
8°
|
8°
|
8°
|
8°
|
7°
|
| 300m |
9°
|
8°
|
8°
|
10°
|
11°
|
11°
|
10°
|
9°
|
| Valley |
10°
|
9°
|
9°
|
11°
|
13°
|
13°
|
11°
|
10°
|
| Freezing Level |
1,800m
|
1,800m
|
1,700m
|
1,600m
|
1,600m
|
1,700m
|
1,700m
|
1,700m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
3°
|
4°
|
6°
|
6°
|
6°
|
5°
|
| 300m |
8°
|
7°
|
7°
|
8°
|
10°
|
9°
|
9°
|
8°
|
| Valley |
9°
|
8°
|
8°
|
10°
|
11°
|
11°
|
11°
|
9°
|
Additional weather information
Meteorologist's view
Plan and prepare for the chance of heavy showers on Saturday will a risk of thunderstorms in the afternoon. Note the sunburn risk, even during cloudy periods.
Weather
Showers will spread up from the southwest in the early hours then becoming drier and brighter for a few hours in the morning. Showers will then develop from late morning onwards, some perhaps heavy and thundery. Showers easing late in the evening.
Chance of cloud-free hill tops
20% becoming 80% during the morning.
Low cloud and visibility
Extensive low cloud, bases 300 to 500m, developing overnight and to start the day giving some difficult navigation at first. This cloud will lift with visibility becoming mainly good through the morning but there will be some reductions in showers with brief patchy cloud above 400m.
Mountain weather information
Weather
A mixture of bright spells and a few showers. Feeling rather humid.
Chance of cloud-free hill tops
30% at first, becoming 80%.
Maximum wind speed expected
North 10 to 15mph.
Temperature
- At 700m Plus 5C rising to 11C.
- Valley Plus 10C rising to 16C.
- Freezing level Above summits.
Low cloud and visibility
Areas of cloud and fog at first, slowly lifting with visibility becoming good. Brief reductions in showers.
Mountain weather information
Mon 4 May
Sunrise:
Sunset:
Mainly dry and bright with scattered showers. Turning cooler with a freshening northwesterly breeze. Freezing level above summits.
Tue 5 May
Sunrise:
Sunset:
Mainly dry with sunny spells and the odd shower, wintry on the tops. Feeling much colder with a brisk northerly breeze. Freezing level 800m.
Wed 6 May
Sunrise:
Sunset:
A cold northerly airstream will continue. Mostly dry and bright with scattered showers, wintry at times. Freezing level 600 to 800m.
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.