Marine Forecast - Isle of Arran

Live Sea State Warnings

No warnings currently. (Integrate Met Office API for live updates)

Tide Updates

High Tide: 08:00 (2.5m) | Low Tide: 14:00 (0.5m). (Integrate Admiralty Tide API)

Ferry Updates

Arran Ferry: On time. (Integrate CalMac API)

Hourly Wave Height Forecast
Wave Height (m) 4 3.5 3 2.5 2 1.5 1 0.5 0
Aug 18 21:00
Aug 18 23:00
Aug 19 01:00
Aug 19 03:00
Aug 19 05:00
Aug 19 07:00
Aug 19 09:00
Aug 19 11:00
Aug 19 13:00
Aug 19 15:00
Aug 19 17:00
Aug 19 19:00
Aug 19 21:00
Aug 19 23:00
Aug 20 01:00
Aug 20 03:00
Aug 20 05:00
Aug 20 07:00
Aug 20 09:00
Aug 20 11:00
Aug 20 13:00
Aug 20 15:00
Aug 20 17:00
Aug 20 19:00
Aug 20 21:00
Aug 20 23:00
Aug 21 01:00
Aug 21 03:00
Aug 21 05:00
Aug 21 07:00
Aug 21 09:00
Aug 21 11:00
Aug 21 13:00
Aug 22 01:00
Aug 22 13:00
Aug 23 01:00
Aug 23 13:00
Aug 24 01:00
Aug 24 13:00
Time
Time Wave Height (m)
Aug 18 21:00 0.30
Aug 18 23:00 0.24
Aug 19 01:00 0.22
Aug 19 03:00 0.22
Aug 19 05:00 0.24
Aug 19 07:00 0.26
Aug 19 09:00 0.28
Aug 19 11:00 0.34
Aug 19 13:00 0.36
Aug 19 15:00 0.34
Aug 19 17:00 0.30
Aug 19 19:00 0.26
Aug 19 21:00 0.22
Aug 19 23:00 0.20
Aug 20 01:00 0.26
Aug 20 03:00 0.40
Aug 20 05:00 0.42
Aug 20 07:00 0.40
Aug 20 09:00 0.36
Aug 20 11:00 0.30
Aug 20 13:00 0.24
Aug 20 15:00 0.18
Aug 20 17:00 0.16
Aug 20 19:00 0.12
Aug 20 21:00 0.08
Aug 20 23:00 0.06
Aug 21 01:00 0.06
Aug 21 03:00 0.04
Aug 21 05:00 0.10
Aug 21 07:00 0.12
Aug 21 09:00 0.12
Aug 21 11:00 0.10
Aug 21 13:00 0.10
Aug 22 01:00 0.14
Aug 22 13:00 0.04
Aug 23 01:00 0.12
Aug 23 13:00 0.06
Aug 24 01:00 0.04
Aug 24 13:00 0.02
Tuesday, 18 August 2026
Time Weather Air Temp (°C) Sea Temp (°C) Wind Speed (mph) Wind Gusts (mph) Wind Dir Wind Cardinal Wave Height (m) Wave Dir Wave Cardinal Wave Period (s) Current Vel (mph) Current Dir Current Cardinal Sea Level (m) Beaufort
21:00 cloudy 13.8 16.3 14.5 20.3 N/A N/A 0.30 SW 3.00 0.10 S -1.27 4
22:00 rain 13.6 16.3 14.3 20.0 N/A N/A 0.28 SW 3.00 0.30 NE -1.25 4
23:00 rain 13.4 16.2 13.4 18.8 N/A N/A 0.24 SW 2.95 0.60 NE -0.95 4
Wednesday, 19 August 2026
Time Weather Air Temp (°C) Sea Temp (°C) Wind Speed (mph) Wind Gusts (mph) Wind Dir Wind Cardinal Wave Height (m) Wave Dir Wave Cardinal Wave Period (s) Current Vel (mph) Current Dir Current Cardinal Sea Level (m) Beaufort
00:00 rain 13.1 16.2 12.3 17.2 N/A N/A 0.22 SW 2.95 0.70 NE -0.43 3
01:00 rain 13.0 16.2 11.4 16.0 N/A N/A 0.22 SW 2.95 0.60 NE 0.13 3
02:00 rain 12.9 16.2 12.1 16.9 N/A N/A 0.22 SW 2.95 0.40 E 0.57 3
03:00 lightrainshowers_night 12.9 16.2 10.7 15.0 N/A N/A 0.22 SW 2.95 0.10 E 0.78 3
04:00 partlycloudy_night 12.3 16.2 11.0 15.4 N/A N/A 0.24 SW 3.00 0.30 SW 0.74 3
05:00 lightrainshowers_night 12.2 16.2 9.8 13.7 N/A N/A 0.24 SW 3.05 0.50 SW 0.47 3
06:00 partlycloudy_day 12.1 16.2 11.6 16.2 N/A N/A 0.26 SW 3.10 0.60 SW 0.06 3
07:00 lightrain 12.4 16.2 10.1 14.1 N/A N/A 0.26 SW 3.10 0.60 SW -0.40 3
08:00 rain 12.7 16.2 9.4 13.2 N/A N/A 0.28 SW 3.15 0.50 SW -0.82 3
09:00 rain 12.8 16.2 11.2 15.7 N/A N/A 0.28 SW 3.15 0.40 SW -1.14 3
10:00 rain 13.3 16.3 11.2 15.7 N/A N/A 0.30 SW 3.20 0.10 W -1.28 3
11:00 heavyrain 13.8 16.3 11.6 16.2 N/A N/A 0.34 SW 3.25 0.30 NE -1.14 3
12:00 heavyrain 13.4 16.3 12.1 16.9 N/A N/A 0.36 S 3.25 0.50 NE -0.74 3
13:00 heavyrainshowers_day 13.8 16.4 12.8 17.9 N/A N/A 0.36 S 3.25 0.60 NE -0.21 4
14:00 rain 14.5 16.4 13.6 19.0 N/A N/A 0.34 S 3.20 0.40 NE 0.26 4
15:00 rain 14.1 16.4 13.6 19.0 N/A N/A 0.34 S 3.15 0.30 NE 0.53 4
16:00 cloudy 14.3 16.4 9.2 12.9 N/A N/A 0.32 S 3.10 0.20 NW 0.58 3
17:00 cloudy 14.7 16.5 8.1 11.3 N/A N/A 0.30 S 3.10 0.20 W 0.43 3
18:00 cloudy 14.8 16.5 8.7 12.2 N/A N/A 0.28 S 3.10 0.40 W 0.14 3
19:00 lightrainshowers_day 14.5 16.5 4.0 5.6 N/A N/A 0.26 S 3.15 0.40 SW -0.22 1
20:00 rain 13.4 16.5 4.0 5.6 N/A N/A 0.24 S 3.20 0.60 SW -0.59 1
21:00 lightrainshowers_night 12.9 16.5 5.6 7.8 N/A N/A 0.22 S 3.30 0.70 SW -0.93 2
22:00 cloudy 12.4 16.5 9.8 13.7 N/A N/A 0.20 S 3.40 0.50 SW -1.17 3
23:00 cloudy 12.6 16.4 13.2 18.5 N/A N/A 0.20 S 3.55 0.30 SW -1.18 4
Thursday, 20 August 2026
Time Weather Air Temp (°C) Sea Temp (°C) Wind Speed (mph) Wind Gusts (mph) Wind Dir Wind Cardinal Wave Height (m) Wave Dir Wave Cardinal Wave Period (s) Current Vel (mph) Current Dir Current Cardinal Sea Level (m) Beaufort
00:00 lightrainshowers_night 12.7 16.4 15.9 22.3 N/A N/A 0.18 S 3.55 0.20 NW -0.89 4
01:00 rain 12.6 16.4 18.1 25.3 N/A N/A 0.26 SE 3.25 0.30 NW -0.40 4
02:00 heavyrain 12.4 16.4 21.9 30.7 N/A N/A 0.32 E 2.85 0.40 W 0.07 5
03:00 heavyrain 12.4 16.3 23.3 32.6 N/A N/A 0.40 E 2.60 0.60 W 0.38 5
04:00 heavyrain 12.1 16.3 24.4 34.2 N/A N/A 0.40 E 2.65 0.70 W 0.46 5
05:00 rain 11.8 16.3 23.0 32.2 N/A N/A 0.42 E 2.80 0.80 W 0.35 5
06:00 partlycloudy_day 11.6 16.3 20.8 29.1 N/A N/A 0.42 NE 2.95 0.70 W 0.10 5
07:00 partlycloudy_day 11.6 16.3 19.0 26.6 N/A N/A 0.40 NE 2.95 0.60 W -0.23 4
08:00 clearsky_day 11.9 16.3 18.1 25.3 N/A N/A 0.38 NE 2.90 0.60 W -0.58 4
09:00 partlycloudy_day 12.6 16.3 18.1 25.3 N/A N/A 0.36 NE 2.85 0.50 SW -0.93 4
10:00 fair_day 13.5 16.3 16.6 23.2 N/A N/A 0.32 NE 2.90 0.40 SW -1.23 4
11:00 partlycloudy_day 14.2 16.3 14.5 20.3 N/A N/A 0.30 NE 2.95 0.30 SW -1.36 4
12:00 partlycloudy_day 14.6 16.4 14.1 19.7 N/A N/A 0.26 NE 3.00 0.20 SE -1.21 4
13:00 fair_day 15.4 16.4 13.4 18.8 N/A N/A 0.24 E 3.00 0.30 SE -0.80 4
14:00 fair_day 16.0 16.5 11.9 16.7 N/A N/A 0.20 E 2.95 0.20 SE -0.30 3
15:00 partlycloudy_day 16.0 16.5 11.4 16.0 N/A N/A 0.18 E 2.95 0.20 SW 0.09 3
16:00 partlycloudy_day 15.9 16.6 11.9 16.7 N/A N/A 0.16 E 2.90 0.40 W 0.26 3
17:00 fair_day 15.6 16.6 13.6 19.0 N/A N/A 0.16 E 2.85 0.50 W 0.23 4
18:00 partlycloudy_day 15.0 16.6 14.1 19.7 N/A N/A 0.14 E 2.90 0.60 W 0.05 4
19:00 partlycloudy_day 14.8 16.6 13.9 19.5 N/A N/A 0.12 SE 3.10 0.60 W -0.21 4
20:00 partlycloudy_night 14.2 16.6 12.3 17.2 N/A N/A 0.10 S 3.35 0.50 W -0.50 3
21:00 partlycloudy_night 13.4 16.5 11.4 16.0 N/A N/A 0.08 S 3.60 0.50 W -0.81 3
22:00 cloudy 13.1 16.5 11.2 15.7 N/A N/A 0.08 SW 3.75 0.40 W -1.10 3
23:00 cloudy 13.2 16.4 11.2 15.7 N/A N/A 0.06 SW 3.85 0.20 NW -1.31 3
Friday, 21 August 2026
Time Weather Air Temp (°C) Sea Temp (°C) Wind Speed (mph) Wind Gusts (mph) Wind Dir Wind Cardinal Wave Height (m) Wave Dir Wave Cardinal Wave Period (s) Current Vel (mph) Current Dir Current Cardinal Sea Level (m) Beaufort
00:00 partlycloudy_night 13.0 16.4 11.0 15.4 N/A N/A 0.06 SW 3.90 0.30 NE -1.30 3
01:00 fair_night 12.2 16.3 11.6 16.2 N/A N/A 0.06 SW 3.85 0.40 E -1.00 3
02:00 clearsky_night 11.7 16.3 11.2 15.7 N/A N/A 0.04 SW 3.70 0.40 E -0.54 3
03:00 fair_night 11.4 16.3 11.2 15.7 N/A N/A 0.04 W 3.45 0.20 E -0.12 3
04:00 fair_night 11.0 16.3 11.2 15.7 N/A N/A 0.06 W 3.10 0.20 S 0.13 3
05:00 clearsky_night 10.7 16.3 10.5 14.7 N/A N/A 0.10 NW 2.60 0.30 SW 0.19 3
06:00 clearsky_day 10.3 16.3 10.5 14.7 N/A N/A 0.12 N 2.30 0.50 SW 0.09 3
07:00 clearsky_day 10.7 16.3 10.5 14.7 N/A N/A 0.12 N 2.20 0.50 SW -0.09 3
08:00 fair_day 11.6 16.3 11.6 16.2 N/A N/A 0.12 N 2.25 0.50 SW -0.31 3
09:00 fair_day 12.3 16.4 11.6 16.2 N/A N/A 0.12 N 2.30 0.50 W -0.58 3
10:00 fair_day 12.8 16.4 11.4 16.0 N/A N/A 0.12 N 2.35 0.60 W -0.89 3
11:00 fair_day 13.6 16.4 10.1 14.1 N/A N/A 0.10 N 2.40 0.40 W -1.17 3
12:00 clearsky_day 14.5 16.5 9.4 13.2 N/A N/A 0.10 N 2.40 0.30 NW -1.29 3
13:00 partlycloudy_day 15.3 16.5 10.5 14.7 N/A N/A 0.10 N 2.35 0.30 NE -1.11 3
19:00 partlycloudy_night 14.0 16.5 10.5 14.7 N/A N/A 0.18 NW 2.20 0.40 SW 0.04 3
Saturday, 22 August 2026
Time Weather Air Temp (°C) Sea Temp (°C) Wind Speed (mph) Wind Gusts (mph) Wind Dir Wind Cardinal Wave Height (m) Wave Dir Wave Cardinal Wave Period (s) Current Vel (mph) Current Dir Current Cardinal Sea Level (m) Beaufort
01:00 fair_night 10.9 16.3 7.6 10.6 N/A N/A 0.14 N 2.70 0.10 W -1.23 2
07:00 partlycloudy_day 10.8 16.2 7.2 10.1 N/A N/A 0.06 NW 2.65 0.20 SW 0.01 2
13:00 cloudy 15.3 16.4 5.8 8.1 N/A N/A 0.04 NW 2.80 0.20 SW -1.16 2
19:00 fair_night 14.6 16.5 10.7 15.0 N/A N/A 0.20 NW 2.00 0.30 SW 0.16 3
Sunday, 23 August 2026
Time Weather Air Temp (°C) Sea Temp (°C) Wind Speed (mph) Wind Gusts (mph) Wind Dir Wind Cardinal Wave Height (m) Wave Dir Wave Cardinal Wave Period (s) Current Vel (mph) Current Dir Current Cardinal Sea Level (m) Beaufort
01:00 clearsky_night 11.7 16.3 6.7 9.4 N/A N/A 0.12 NW 2.45 0.30 SW -1.22 2
07:00 partlycloudy_day 11.2 16.2 8.5 11.9 N/A N/A 0.10 NW 2.45 0.10 W 0.05 3
13:00 lightrainshowers_day 15.8 16.5 5.6 7.8 N/A N/A 0.06 NW 2.30 0.30 SW -1.09 2
19:00 cloudy 15.4 16.7 3.4 4.8 N/A N/A 0.04 W 2.35 0.10 S 0.21 1
Monday, 24 August 2026
Time Weather Air Temp (°C) Sea Temp (°C) Wind Speed (mph) Wind Gusts (mph) Wind Dir Wind Cardinal Wave Height (m) Wave Dir Wave Cardinal Wave Period (s) Current Vel (mph) Current Dir Current Cardinal Sea Level (m) Beaufort
01:00 clearsky_night 11.2 16.5 2.5 3.5 N/A N/A 0.04 W 2.45 0.50 W -0.95 1
07:00 partlycloudy_day 10.6 16.5 1.8 2.5 N/A N/A 0.02 W 4.20 0.20 NE -0.05 1
13:00 partlycloudy_day 15.6 16.8 3.6 5.0 N/A N/A 0.02 SW 4.90 0.40 W -0.81 1
19:00 partlycloudy_night 15.4 17.2 0.9 1.3 N/A N/A 0.02 SW 4.85 0.20 NE 0.18 0
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