ArranWeather
Arran ferries

Ferry weather forecast

How the forecast wind, gusts and sea state could affect each crossing over the next 3 days.

CalMac live service status →

Ardrossan – Brodick

Crossing 55 min
Disruption likely
Disruption likely — SW wind 36 mph onto Ardrossan
NowThu 23:00

Troon – Brodick

Crossing 75 min
Provisional
Disruption likely
Disruption likely — SW wind 39 mph onto Troon
NowThu 23:00

Lochranza – Claonaig

Crossing 30 min
Provisional
Disruption likely
Disruption likely — Gusts 52 mph
NowThu 23:00

Hour by hour

TimeOutlookWindGustDirWavesWeatherSea
Ardrossan – Brodick · Tuesday 27 October
07:00 Disruption likelySW wind 36 mph onto Ardrossan · Gusts 51 mph · Waves 2.6 m
37
52
 SW 2.6 m Partly cloudy 13.4°
08:00 Disruption likelySW wind 27 mph onto Ardrossan · Waves 2.4 m
28
37
 SW 2.4 m Partly cloudy 13.4°
09:00 Disruption likelySW wind 25 mph onto Ardrossan · Waves 2.2 m
26
34
 SW 2.2 m Light rain 13.4°
10:00 Disruption likelySW wind 28 mph onto Ardrossan
28
38
 SW 1.9 m Light rain 13.4°
11:00 Disruption likelySW wind 28 mph onto Ardrossan
28
39
 SW 1.7 m Showers 13.3°
12:00 Possible disruptionSW wind 20 mph onto Ardrossan
21
27
 SW 1.6 m Light showers 13.3°
13:00 Disruption likelyWSW wind 26 mph onto Ardrossan
27
36
 WSW 1.5 m Showers 13.3°
14:00 Possible disruptionWSW wind 20 mph onto Ardrossan
21
27
 WSW 1.3 m Showers 13.3°
15:00 Disruption likelySW wind 28 mph onto Ardrossan
29
39
 SW 1.3 m Showers 13.3°
16:00 Disruption likelySW wind 25 mph onto Ardrossan
26
34
 SW 1.1 m Light showers 13.3°
17:00 Disruption likelyWSW wind 24 mph onto Ardrossan
25
33
 WSW 1.1 m Partly cloudy 13.3°
18:00 Disruption likelySW wind 23 mph onto Ardrossan
24
32
 SW 1.2 m Partly cloudy 13.3°
19:00 Disruption likelySW wind 23 mph onto Ardrossan
23
31
 SW 1.2 m Light showers 13.3°
20:00 Disruption likelySW wind 26 mph onto Ardrossan
27
36
 SW 1.2 m Partly cloudy 13.3°
21:00 Disruption likelySW wind 24 mph onto Ardrossan
24
33
 SW 1.2 m Partly cloudy 13.3°
22:00 Disruption likelySW wind 27 mph onto Ardrossan
27
37
 SW 1.2 m Partly cloudy 13.3°
23:00 Disruption likelySW wind 29 mph onto Ardrossan
29
40
 SW 1.2 m Cloudy 13.3°
Ardrossan – Brodick · Wednesday 28 October
00:00 Disruption likelySSW wind 29 mph onto Ardrossan
29
40
 SSW 1.3 m Heavy rain 13.3°
01:00 Disruption likelySSW wind 29 mph onto Ardrossan
29
40
 SSW 1.3 m Rain 13.3°
02:00 Disruption likelySSW wind 30 mph onto Ardrossan
30
42
 SSW 1.4 m Rain 13.3°
03:00 Disruption likelySW wind 24 mph onto Ardrossan
24
33
 SW 1.6 m Light rain 13.3°
04:00 Should be fine
14
18
 SSW 1.5 m Light rain 13.3°
05:00 Should be fine
15
20
 SW 1.3 m Rain 13.2°
06:00 Should be fine
9
11
 SW 1.2 m Rain 13.2°
07:00 Possible disruptionSSW wind 16 mph onto Ardrossan
16
21
 SSW 1.1 m Rain 13.2°
08:00 Possible disruptionSW wind 20 mph onto Ardrossan
20
27
 SW 1.0 m Rain 13.2°
09:00 Possible disruptionSW wind 20 mph onto Ardrossan
21
27
 SW 0.9 m Light rain 13.2°
10:00 Possible disruptionSW wind 21 mph onto Ardrossan
21
28
 SW 0.8 m Light rain 13.2°
11:00 Possible disruptionSW wind 19 mph onto Ardrossan
20
26
 SW 0.8 m Light rain 13.2°
12:00 Possible disruptionWSW wind 20 mph onto Ardrossan
20
27
 WSW 0.8 m Fair 13.2°
13:00 Possible disruptionWSW wind 18 mph onto Ardrossan
18
24
 WSW 0.8 m Partly cloudy 13.2°
14:00 Should be fine
15
20
 WSW 0.8 m Partly cloudy 13.2°
15:00 Should be fine
13
16
 SW 0.7 m Partly cloudy 13.2°
16:00 Possible disruptionS wind 18 mph onto Ardrossan
19
24
 S 0.6 m Light showers 13.2°
17:00 Possible disruptionSSW wind 18 mph onto Ardrossan
18
24
 SSW 0.6 m Cloudy 13.2°
18:00 Should be fine
15
19
 SSW 0.5 m Cloudy 13.2°
19:00 Possible disruptionSSW wind 16 mph onto Ardrossan
16
21
 SSW 0.5 m Fair 13.2°
20:00 Should be fine
12
15
 SSW 0.5 m Partly cloudy 13.2°
21:00 Should be fine
11
15
 S 0.5 m Cloudy 13.2°
22:00 Should be fine
12
16
 SSW 0.5 m Partly cloudy 13.2°
23:00 Should be fine
12
15
 SSW 0.4 m Cloudy 13.2°
Ardrossan – Brodick · Thursday 29 October
00:00 Should be fine
12
15
 SSW 0.5 m Cloudy 13.2°
01:00 Should be fine
13
16
 SSW 0.5 m Cloudy 13.2°
02:00 Should be fine
14
18
 SSW 0.5 m Cloudy 13.2°
03:00 Should be fine
15
20
 S 0.5 m Cloudy 13.2°
04:00 Should be fine
14
19
 S 0.5 m Cloudy 13.2°
05:00 Should be fine
13
18
 S 0.5 m Cloudy 13.2°
06:00 Should be fine
13
18
 S 0.5 m Cloudy 13.2°
07:00 Should be fine
12
19
 S 0.6 m Cloudy 13.2°
08:00 Should be fine
13
20
 S 0.6 m Cloudy 13.2°
09:00 Should be fine
13
21
 S 0.6 m Partly cloudy 13.2°
10:00 Should be fine
14
23
 S 0.6 m Partly cloudy 13.2°
11:00 Should be fine
16
25
 S 0.6 m Partly cloudy 13.2°
12:00 Possible disruptionS wind 16 mph onto Ardrossan
17
27
 S 0.7 m Partly cloudy 13.2°
13:00 Possible disruptionS wind 17 mph onto Ardrossan
17
28
 S 0.7 m Partly cloudy 13.2°
14:00 Possible disruptionS wind 17 mph onto Ardrossan
18
29
 S 0.7 m Fair 13.2°
15:00 Possible disruptionS wind 18 mph onto Ardrossan
18
29
 S 0.8 m Cloudy 13.2°
16:00 Possible disruptionS wind 17 mph onto Ardrossan
18
29
 S 0.8 m Cloudy 13.2°
17:00 Should be fine
17
28
 SSE 0.8 m Partly cloudy 13.2°
18:00 Should be fine
17
28
 SSE 0.8 m Cloudy 13.2°
19:00 Should be fine
17
27
 SSE 0.9 m Cloudy 13.2°
20:00 Should be fine
16
26
 SSE 0.9 m Partly cloudy 13.2°
21:00 Should be fine
16
26
 SSE 1.0 m Partly cloudy 13.2°
22:00 Should be fine
17
27
 SSE 1.0 m Cloudy 13.2°
23:00 Should be fine
18
29
 SSE 1.1 m Cloudy 13.2°
Ardrossan – Brodick · Friday 30 October
00:00 Should be fine
18
30
 SSE 1.2 m Rain 13.2°
06:00 Possible disruptionS wind 17 mph onto Ardrossan
17
28
 S 1.4 m Heavy rain 13.2°

How the outlook works

Each crossing is checked hour by hour at mid-crossing using the UK Met Office wind and gust forecast and the MET Norway sea-state forecast.

  • Wind direction and harbour exposure. Ardrossan is exposed to southerly and westerly winds, Brodick to north-easterlies and easterlies. These rules come from the original Arran Weather ferry forecast.
  • Gusts strong enough to make berthing difficult.
  • Wave height mid-crossing.

This is a weather-based guide, not a timetable. CalMac decides whether sailings go, and other factors such as tides, vessel availability and harbour works also matter.

Exposure limits (mean wind, mph)

PortDirectionPossibleLikely
ArdrossanS16+28+
ArdrossanSSW16+23+
ArdrossanSW16+23+
ArdrossanWSW16+23+
ArdrossanW16+25+
ArdrossanWNW25+30+
ArdrossanNW28+–
BrodickNNE16+28+
BrodickNE16+22+
BrodickENE16+22+
BrodickE16+23+
TroonSW20+30+
TroonWSW20+28+
TroonW20+28+
TroonWNW22+30+
TroonNW25+32+
LochranzaNW18+26+
LochranzaNNW18+25+
LochranzaN18+25+
LochranzaNNE18+26+
ClaonaigENE18+26+
ClaonaigE18+25+
ClaonaigESE18+25+
ClaonaigSE18+26+
ClaonaigSSE20+28+

Troon, Lochranza and Claonaig limits are provisional. The Lochranza crossing runs to Claonaig in summer and to Tarbert (Loch Fyne) in winter.