Mountain weather
Southwest Highlands
Confidence
High confidence for settled weather on Sunday but otherwise largely unsettled with occasionally strong winds. Lower confidence for rainfall details on Monday, and for developments on Wednesday.
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This eveningSunrise:Sunset:
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Sat 12 SepSunrise:Sunset:
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Sun 13 SepSunrise:Sunset:
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Further outlook
This evening forecast
Dry much of the evening with some bright spells to start, but cloud becoming increasingly widespread around 700-900m and some rain reaching Mull, Moidart and island ranges shortly before midnight. Strengthening southerly winds reaching mean speeds around 40-50mph and gusting 60-70mph over the summits.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Gales
Poor Visibility
Heavy Persistent Rain
Storm Force Winds
Severe Chill Effect
Strong Sunlight
Mountain weather forecast
Heavy rain, summit gales in morning. Cloudy, showers afternoon. Brighter evening. Chilly.
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Time
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Time |
00:00
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03:00
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06:00
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09:00
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12:00
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15:00
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18:00
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21:00
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|---|---|---|---|---|---|---|---|---|---|
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Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
80%
|
≥95%
|
≥95%
|
80%
|
80%
|
50%
|
20%
|
10%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
1300m
|
1300m | S 42mph knots
S
42mph |
S 46mph knots
S
46mph |
S 48mph knots
S
48mph |
SW 39mph knots
SW
39mph |
SW 30mph knots
SW
30mph |
W 22mph knots
W
22mph |
W 18mph knots
W
18mph |
W 14mph knots
W
14mph |
|
900m
|
900m | S 27mph knots
S
27mph |
S 30mph knots
S
30mph |
S 29mph knots
S
29mph |
SW 28mph knots
SW
28mph |
W 23mph knots
W
23mph |
W 17mph knots
W
17mph |
W 15mph knots
W
15mph |
W 11mph knots
W
11mph |
|
600m
|
600m | S 36mph knots
S
36mph |
S 42mph knots
S
42mph |
S 40mph knots
S
40mph |
SW 33mph knots
SW
33mph |
SW 25mph knots
SW
25mph |
W 16mph knots
W
16mph |
W 13mph knots
W
13mph |
SW 8mph knots
SW
8mph |
|
300m
|
300m | S 17mph knots
S
17mph |
S 18mph knots
S
18mph |
S 19mph knots
S
19mph |
SW 18mph knots
SW
18mph |
SW 14mph knots
SW
14mph |
W 11mph knots
W
11mph |
W 8mph knots
W
8mph |
SW 5mph knots
SW
5mph |
|
Glen
|
Glen | S 11mph knots
S
11mph |
S 11mph knots
S
11mph |
S 13mph knots
S
13mph |
SW 13mph knots
SW
13mph |
SW 11mph knots
SW
11mph |
W 10mph knots
W
10mph |
W 7mph knots
W
7mph |
SW 4mph knots
SW
4mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
1300m
|
1300m | 52mph | 59mph | 60mph | 51mph | 39mph | 29mph | 23mph | 17mph |
|
900m
|
900m | 36mph | 42mph | 41mph | 39mph | 31mph | 24mph | 20mph | 14mph |
|
600m
|
600m | 45mph | 53mph | 51mph | 43mph | 34mph | 23mph | 18mph | 12mph |
|
300m
|
300m | 28mph | 31mph | 30mph | 29mph | 23mph | 17mph | 14mph | 8mph |
|
Glen
|
Glen | 25mph | 26mph | 29mph | 28mph | 21mph | 18mph | 15mph | 8mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
1300m
|
1300m | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 7 degrees Celsius 7°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C |
|
900m
|
900m | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 9 degrees Celsius 9°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 8 degrees Celsius 8°C | 6 degrees Celsius 6°C |
|
600m
|
600m | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C |
|
300m
|
300m | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C |
|
Glen
|
Glen | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
2500m
|
3400m
|
3000m
|
2600m
|
2600m
|
2300m
|
2100m
|
1700m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
1300m
|
1300m | -4 degrees Celsius -4°C | -2 degrees Celsius -2°C | 1 degrees Celsius 1°C | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 0 degrees Celsius 0°C | 0 degrees Celsius 0°C |
|
900m
|
900m | 2 degrees Celsius 2°C | 2 degrees Celsius 2°C | 4 degrees Celsius 4°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C |
|
600m
|
600m | 5 degrees Celsius 5°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C |
|
300m
|
300m | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C |
|
Glen
|
Glen | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
| Freezing Level | Freezing Level |
2500m
|
3400m
|
3000m
|
2600m
|
2600m
|
2300m
|
2100m
|
1700m
|
Additional weather information
Meteorologist's view
Very challenging conditions in the morning with heavy rain, severe wind chill, widespread low cloud, and walking will be extremely difficult on exposed ground with a high risk of being blown over in 60-70mph winds. Conditions much improved later in the day.
Weather
Widespread and occasionally heavy rain spreads east in the early morning, this accompanied by widespread summit gales and some storm-force gusts over the highest summits. Rain becoming more patchy and lighter and winds start to ease from late morning, but remaining rather cloudy. Remaining rather cloudy with further mainly light showers spread east through the rest of the afternoon. Becoming dry with some clear spells in the evening.
Chance of cloud-free hill tops
20% or less in morning, rising to 80% from late-afternoon.
Low cloud and visibility
Quite widespread cloud down to 700m in the early hours, falling to 500m for a time in the morning with poor visibilities in heavy rain. Cloud gradually lifting and breaking through the afternoon and evening to allow some good clear spells and visibilities.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
A much better day compared to Saturday. Mostly dry throughout the day with lengthy bright or sunny spells in the morning, a bit more by way of cloud in the afternoon. Chance of the very odd light shower by day in the west. Mostly light winds by day. Cloudier in the later evening with some outbreaks of rain and freshening southerly winds.
Chance of cloud-free hill tops
80% or higher until late evening.
Maximum wind speed expected
Generally west backing southwest 10-15mph. Increasing south to southwest 25-35mph late evening.
Temperature
- At 800m Plus 5C rising to plus 8C by day.
- Glen Plus 8C rising to plus 17C by day.
- Freezing level 1400-1600m in north before dawn, otherwise well above summits.
Low cloud and visibility
Summits largely clear through the day with excellent visibilities. Any afternoon cloud largely above the summits but some patches possible around summits above 1000m or so. Cloud becomes more widespread from the west shortly before midnight, down to 500-700m.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 14 Sep
Cloud and rain spread east, occasionally heavy and persistent. Fresh to strong south to southwest winds. Freezing level well above summits.
Tue 15 Sep
Frequent heavy showers in morning, chance of hail, lightning. Showers less heavy, less frequent in afternoon, evening. Strong west to northwest winds. Freezing level above summits.
Wed 16 Sep
Bright spells and scattered showers, chance of more persistent rain. Strong west to southwest winds. Freezing level above summits.
Summit specific forecast
Including Ben Nevis, Glen Coe and the rest of Lochaber, Argyll including the Isles, Loch Lomond, Trossachs and Arran