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.

Brodick - Normal service Lochranza - Normal service
Thursday 1st December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
13:00 Should be fine 5.09ft SSW 16 mph 16 mph
14:00 Should be fine 5.05ft SSW 15 mph 15 mph
15:00 Should be fine 5.02ft SSW 14 mph 14 mph
16:00 Should be fine 4.91ft S 12 mph 12 mph
17:00 Should be fine 4.91ft S 12 mph 12 mph
18:00 Should be fine 4.91ft S 12 mph 12 mph
19:00 Should be fine 4.95ft S 13 mph 13 mph
20:00 Should be fine 5.02ft S 14 mph 14 mph
21:00 Should be fine 5.02ft S 14 mph 14 mph
22:00 Should be fine 5.03ft S 15 mph 15 mph
23:00 Should be fine 5.09ft S 16 mph 16 mph
Friday 2nd December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Possibly Ardrossan 5.1ft S 16 mph 16 mph
01:00 Possibly Ardrossan 5.1ft S 16 mph 16 mph
02:00 Should be fine 5.09ft SSE 16 mph 16 mph
03:00 Possibly Ardrossan 5.11ft S 16 mph 16 mph
04:00 Should be fine 5.06ft S 15 mph 15 mph
05:00 Should be fine 5.04ft S 15 mph 15 mph
06:00 Should be fine 4.96ft SSE 13 mph 13 mph
07:00 Should be fine 4.93ft SSE 13 mph 13 mph
08:00 Should be fine 4.93ft SSE 13 mph 13 mph
09:00 Should be fine 4.89ft SE 12 mph 12 mph
10:00 Should be fine 4.79ft SE 10 mph 10 mph
11:00 Should be fine 4.67ft SSE 9 mph 9 mph
12:00 Should be fine 4.48ft SE 7 mph 7 mph
13:00 Should be fine 4.32ft SE 5 mph 5 mph
14:00 Should be fine 4.38ft ESE 6 mph 6 mph
15:00 Should be fine 4.48ft ESE 7 mph 7 mph
16:00 Should be fine 4.43ft ESE 6 mph 6 mph
17:00 Should be fine 4.59ft ESE 8 mph 8 mph
18:00 Should be fine 4.7ft ESE 9 mph 9 mph
19:00 Should be fine 4.7ft SE 9 mph 9 mph
20:00 Should be fine 4.63ft SE 8 mph 8 mph
21:00 Should be fine 4.5ft SE 7 mph 7 mph
22:00 Should be fine 4.46ft SE 6 mph 6 mph
23:00 Should be fine 4.55ft ESE 7 mph 7 mph
Saturday 3rd December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Should be fine 4.63ft ESE 8 mph 8 mph
01:00 Should be fine 4.75ft ESE 10 mph 10 mph
02:00 Should be fine 4.82ft ESE 11 mph 11 mph
03:00 Should be fine 4.82ft ESE 11 mph 11 mph
04:00 Should be fine 4.84ft ESE 11 mph 11 mph
05:00 Should be fine 4.84ft ESE 11 mph 11 mph
06:00 Should be fine 4.8ft ESE 11 mph 11 mph
07:00 Should be fine 4.77ft ESE 10 mph 10 mph
08:00 Should be fine 4.82ft ESE 11 mph 11 mph
09:00 Should be fine 4.83ft ESE 11 mph 11 mph
10:00 Should be fine 4.8ft ESE 11 mph 11 mph
11:00 Should be fine 4.72ft ESE 9 mph 9 mph
12:00 Should be fine 4.69ft SE 9 mph 9 mph
13:00 Should be fine 4.63ft SE 8 mph 8 mph
14:00 Should be fine 4.65ft SE 9 mph 9 mph
15:00 Should be fine 4.7ft SE 9 mph 9 mph
16:00 Should be fine 4.77ft ESE 10 mph 10 mph
17:00 Should be fine 4.82ft ESE 11 mph 11 mph
18:00 Should be fine 4.86ft ESE 11 mph 11 mph
19:00 Should be fine 4.84ft ESE 11 mph 11 mph
20:00 Should be fine 4.84ft ENE 11 mph 11 mph
21:00 Should be fine 4.93ft ENE 13 mph 13 mph
22:00 Should be fine 4.99ft ENE 14 mph 14 mph
23:00 Should be fine 4.97ft ENE 13 mph 13 mph
Sunday 4th December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Should be fine 5.01ft ENE 14 mph 14 mph
06:00 Should be fine 5.01ft ENE 14 mph 14 mph
12:00 Should be fine 5.04ft ENE 15 mph 15 mph
18:00 Possibly Brodick 5.15ft NE 17 mph 17 mph
Monday 5th December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Possibly Brodick 5.12ft NE 17 mph 17 mph
06:00 Should be fine 5.09ft NE 16 mph 16 mph
12:00 Possibly Brodick 5.15ft NE 17 mph 17 mph
18:00 Possibly Brodick 5.22ft NE 19 mph 19 mph
Tuesday 6th December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Possibly Brodick 5.12ft NE 17 mph 17 mph
06:00 Possibly Brodick 5.15ft NE 17 mph 17 mph
12:00 Should be fine 5.06ft NE 15 mph 15 mph
18:00 Should be fine 4.93ft NNE 13 mph 13 mph
Wednesday 7th December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Should be fine 4.82ft N 11 mph 11 mph
06:00 Should be fine 5.1ft N 16 mph 16 mph
12:00 Should be fine 4.97ft N 13 mph 13 mph
18:00 Should be fine 4.96ft NNW 13 mph 13 mph
Thursday 8th December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Should be fine 5.04ft NW 15 mph 15 mph
06:00 Should be fine 5ft NW 14 mph 14 mph
12:00 Should be fine 4.55ft WSW 7 mph 7 mph
18:00 Probably Ardrossan 5.47ft SSW 27 mph 27 mph
Friday 9th December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Probably Ardrossan 5.39ft WNW 24 mph 24 mph
06:00 Should be fine 4.95ft NW 13 mph 13 mph
12:00 Possibly Ardrossan 5.21ft WSW 19 mph 19 mph
18:00 Possibly Ardrossan 5.2ft NW 18 mph 18 mph
Saturday 10th December
Time Port Affected? Waves Dir Wind Gust Sea Temp. Fog
00:00 Should be fine 5.06ft W 15 mph 15 mph
06:00 Should be fine 4.91ft WSW 12 mph 12 mph
12:00 Should be fine 4.23ft W 5 mph 5 mph
Forecast produced: 2022-12-10T18:00:00Z

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