This is an unofficial forecast. The aim is to help people with their forward planning. Current wave height calculations don’t take into account the different fetches for different wind directions, nor does it take into account the duration of the wind.

Always check with CalMac for the details of the service between Brodick and Ardrossan, or Lochranza and Claonaig / Tarbert.

When
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
Today
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
14:00
12mph
W
Should be fine
3.31ft
15:00
13mph
W
Should be fine
3.54ft
16:00
13mph
W
Should be fine
3.54ft
17:00
14mph
W
Should be fine
3.75ft
18:00
13mph
W
Should be fine
3.54ft
19:00
13mph
W
Should be fine
3.54ft
20:00
13mph
W
Should be fine
3.54ft
1%
21:00
13mph
W
Should be fine
3.54ft
31%
22:00
12mph
W
Should be fine
3.31ft
3%
23:00
12mph
W
Should be fine
3.31ft
2%
Tomorrow
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
12mph
NW
Should be fine
3.31ft
01:00
12mph
NW
Should be fine
3.31ft
02:00
11mph
NW
Should be fine
3.06ft
03:00
10mph
NW
Should be fine
2.79ft
04:00
11mph
NW
Should be fine
3.06ft
05:00
11mph
NW
Should be fine
3.06ft
06:00
11mph
NW
Should be fine
3.06ft
07:00
14mph
NW
Should be fine
3.75ft
08:00
16mph
NW
Should be fine
4.13ft
09:00
15mph
NW
Should be fine
3.94ft
10:00
18mph
W
Possibly affecting Ardrossan
4.46ft
11:00
19mph
W
Possibly affecting Ardrossan
4.62ft
12:00
16mph
W
Should be fine
4.13ft
13:00
19mph
W
Possibly affecting Ardrossan
4.62ft
14:00
18mph
W
Possibly affecting Ardrossan
4.46ft
15:00
18mph
W
Possibly affecting Ardrossan
4.46ft
16:00
16mph
W
Should be fine
4.13ft
17:00
16mph
W
Should be fine
4.13ft
18:00
13mph
W
Should be fine
3.54ft
19:00
14mph
W
Should be fine
3.75ft
20:00
14mph
W
Should be fine
3.75ft
21:00
16mph
W
Should be fine
4.13ft
22:00
15mph
W
Should be fine
3.94ft
23:00
15mph
W
Should be fine
3.94ft
27.02.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
14mph
W
Should be fine
3.75ft
01:00
14mph
W
Should be fine
3.75ft
02:00
13mph
W
Should be fine
3.54ft
03:00
13mph
W
Should be fine
3.54ft
04:00
12mph
W
Should be fine
3.31ft
05:00
12mph
W
Should be fine
3.31ft
06:00
14mph
W
Should be fine
3.75ft
07:00
13mph
W
Should be fine
3.54ft
08:00
13mph
W
Should be fine
3.54ft
09:00
15mph
W
Should be fine
3.94ft
10:00
18mph
W
Possibly affecting Ardrossan
4.46ft
11:00
18mph
W
Possibly affecting Ardrossan
4.46ft
12:00
23mph
W
Possibly affecting Ardrossan
5.16ft
13:00
23mph
W
Possibly affecting Ardrossan
5.16ft
14:00
22mph
NW
Possibly affecting Ardrossan
5.04ft
15:00
19mph
NW
Possibly affecting Ardrossan
4.62ft
16:00
17mph
NW
Should be fine
4.3ft
17:00
17mph
W
Should be fine
4.3ft
18:00
14mph
NW
Should be fine
3.75ft
19:00
13mph
W
Should be fine
3.54ft
20:00
13mph
W
Should be fine
3.54ft
21:00
12mph
W
Should be fine
3.31ft
22:00
9mph
W
Should be fine
2.49ft
23:00
9mph
W
Should be fine
2.49ft
28.02.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
11mph
W
Should be fine
3.06ft
06:00
11mph
S
Should be fine
3.06ft
12:00
20mph
SE
Should be fine
4.77ft
18:00
15mph
E
Should be fine
3.94ft
29.02.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
23mph
S
Possibly affecting Ardrossan
5.16ft
06:00
12mph
SW
Should be fine
3.31ft
12:00
17mph
W
Should be fine
4.3ft
18:00
17mph
SW
Should be fine
4.3ft
01.03.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
21mph
SW
Possibly affecting Ardrossan
4.9ft
06:00
16mph
SW
Should be fine
4.13ft
12:00
14mph
SW
Should be fine
3.75ft
18:00
5mph
SW
Should be fine
0.83ft
02.03.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
5mph
SW
Should be fine
0.83ft
06:00
5mph
SW
Should be fine
0.83ft
12:00
6mph
W
Should be fine
1.34ft
18:00
5mph
W
Should be fine
0.83ft
03.03.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
9mph
W
Should be fine
2.49ft
06:00
6mph
W
Should be fine
1.34ft
12:00
8mph
SW
Should be fine
2.16ft
18:00
14mph
S
Should be fine
3.75ft
04.03.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
20mph
SE
Should be fine
4.77ft
06:00
26mph
SE
Should be fine
5.51ft
12:00
17mph
S
Should be fine
4.3ft
18:00
15mph
W
Should be fine
3.94ft
05.03.2020
Avg Wind
Dir.
Port Affected?
Waves
Wx
Temp
Fog?
00:00
13mph
S
Should be fine
3.54ft
06:00
7mph
NW
Should be fine
1.77ft
12:00
22mph
NW
Possibly affecting Ardrossan
5.04ft
18:00
21mph
NW
Possibly affecting Ardrossan
4.9ft
Weather forecast from yr.no, delivered by the Norwegian Meteorological Institute and the NRK
Script by nordicweather.net

Just for fun! Always check with CalMac regarding the actual status of your sailings.