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.

Tue 27th
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
13:00
Should be fine
13mph
SW
3.54ft
14:00
Possibly affecting Ardrossan
20mph
W
4.77ft
15:00
Possibly affecting Ardrossan
17mph
W
4.3ft
16:00
Should be fine
13mph
W
3.54ft
17:00
Should be fine
11mph
W
3.06ft
18:00
Should be fine
12mph
SW
3.31ft
19:00
Should be fine
14mph
SW
3.75ft
20:00
Should be fine
15mph
SW
3.94ft
21:00
Should be fine
15mph
SW
3.94ft
22:00
Possibly affecting Ardrossan
16mph
SW
4.13ft
23:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
Wed 28th
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
01:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
02:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
03:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
04:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
05:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
06:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
07:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
08:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
09:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
10:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
11:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
12:00
Possibly affecting Ardrossan
17mph
SW
4.3ft
13:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
14:00
Possibly affecting Ardrossan
17mph
SW
4.3ft
15:00
Possibly affecting Ardrossan
16mph
SW
4.13ft
16:00
Possibly affecting Ardrossan
16mph
SW
4.13ft
17:00
Should be fine
15mph
SW
3.94ft
18:00
Possibly affecting Ardrossan
16mph
SW
4.13ft
19:00
Possibly affecting Ardrossan
17mph
SW
4.3ft
20:00
Possibly affecting Ardrossan
17mph
SW
4.3ft
21:00
Possibly affecting Ardrossan
19mph
W
4.62ft
22:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
23:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
Thu 29th
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Should be fine
15mph
SW
3.94ft
01:00
Should be fine
15mph
SW
3.94ft
02:00
Should be fine
14mph
SW
3.75ft
03:00
Should be fine
13mph
SW
3.54ft
04:00
Should be fine
14mph
SW
3.75ft
05:00
Should be fine
14mph
S
3.75ft
06:00
Possibly affecting Ardrossan
18mph
S
4.46ft
07:00
Possibly affecting Ardrossan
19mph
S
4.62ft
08:00
Should be fine
19mph
SE
4.62ft
09:00
Possibly affecting Ardrossan
17mph
S
4.3ft
10:00
Possibly affecting Ardrossan
16mph
S
4.13ft
11:00
Should be fine
15mph
S
3.94ft
12:00
Possibly affecting Ardrossan
16mph
S
4.13ft
13:00
Should be fine
15mph
S
3.94ft
14:00
Possibly affecting Ardrossan
17mph
SW
4.3ft
15:00
Possibly affecting Ardrossan
17mph
SW
4.3ft
16:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
17:00
Possibly affecting Ardrossan
19mph
S
4.62ft
18:00
Possibly affecting Ardrossan
20mph
SW
4.77ft
19:00
Possibly affecting Ardrossan
21mph
SW
4.9ft
20:00
Possibly affecting Ardrossan
20mph
SW
4.77ft
21:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
22:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
23:00
Possibly affecting Ardrossan
19mph
SW
4.62ft
Fri 30th
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Possibly affecting Ardrossan
18mph
SW
4.46ft
06:00
Should be fine
13mph
SW
3.54ft
12:00
Should be fine
14mph
W
3.75ft
18:00
Should be fine
7mph
W
1.77ft
Sat 31st
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Should be fine
11mph
SE
3.06ft
06:00
Possibly affecting Brodick
16mph
E
4.13ft
12:00
Probably affecting Ardrossan
35mph
S
6.36ft
18:00
Possibly affecting Ardrossan
24mph
S
5.28ft
Sun 1st
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Possibly affecting Ardrossan
25mph
S
5.4ft
06:00
Probably affecting Ardrossan
40mph
S
6.74ft
12:00
Probably affecting Ardrossan
27mph
W
5.62ft
18:00
Possibly affecting Ardrossan
18mph
W
4.46ft
Mon 2nd
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Should be fine
14mph
SW
3.75ft
06:00
Should be fine
11mph
SE
3.06ft
12:00
Should be fine
15mph
N
3.94ft
18:00
Possibly affecting Ardrossan
24mph
W
5.28ft
Tue 3rd
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Probably affecting Ardrossan
29mph
W
5.82ft
06:00
Possibly affecting Ardrossan
20mph
W
4.77ft
12:00
Possibly affecting Ardrossan
17mph
W
4.3ft
18:00
Should be fine
13mph
W
3.54ft
Wed 4th
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Should be fine
13mph
NW
3.54ft
06:00
Should be fine
9mph
NW
2.49ft
12:00
Should be fine
14mph
NW
3.75ft
18:00
Should be fine
13mph
W
3.54ft
Thu 5th
Port Affected?
Avg Wind
Dir.
Waves
Wx
Temp
Fog?
00:00
Should be fine
12mph
W
3.31ft
06:00
Should be fine
11mph
W
3.06ft
12:00
Should be fine
10mph
SW
2.79ft
18:00
Should be fine
7mph
W
1.77ft

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