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Notice 21-10-2026. Over the coming 3 weeks we will be migrating to a newer version of Bigsalty. Whilst this happens we have removed login / user capabilities and some current weather functionality.

Great South Bay Weather Forecast

GFS 0.5° atmospheric and GFSWave 0.25° marine forecast data for Great South Bay.

Saturday 24 October (Today)

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
1.5kts
3.5kts
0.7m
9.7sec
-1mm
-1%
15°C
12°C
  • ●
  • ●
  • ●
05:00
5kts
4.7kts
0.7m
9.6sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
08:00
5.6kts
5.3kts
0.6m
9.4sec
0mm
0%
15°C
11°C
  • ●
  • ●
  • ●
11:00
4kts
4.6kts
0.6m
9.2sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
14:00
4.6kts
4.9kts
0.5m
9.2sec
0mm
0%
16°C
13°C
  • ●
  • ●
  • ●
17:00
7.1kts
7.3kts
0.6m
11.8sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
20:00
4.8kts
5.7kts
0.6m
12.3sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
23:00
5.6kts
6.2kts
0.6m
12.2sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●

Sunrise: 07:12 / Sunset: 18:00 Twilight: 06:44 / 18:28

°C

Sunday 25 October (Tomorrow)

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
6.7kts
7.3kts
0.6m
12.3sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
05:00
5.4kts
5.5kts
0.6m
12.5sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
08:00
6kts
6.2kts
0.6m
12.6sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
11:00
5.2kts
5.9kts
0.6m
12.6sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
14:00
5.5kts
6.1kts
0.5m
12.5sec
0mm
0%
16°C
14°C
  • ●
  • ●
  • ●
17:00
5.4kts
6.1kts
0.5m
12.3sec
0mm
0%
15°C
15°C
  • ●
  • ●
  • ●
20:00
6.2kts
7.1kts
0.5m
12sec
0mm
0%
15°C
15°C
  • ●
  • ●
  • ●
23:00
9kts
11.7kts
0.5m
11.8sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●

Sunrise: 07:13 / Sunset: 17:59 Twilight: 06:45 / 18:27

Monday 26 October

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
10.7kts
14.1kts
0.5m
11.6sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
05:00
10.2kts
12.8kts
0.6m
11.1sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
08:00
11.3kts
13.7kts
0.6m
10.9sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
11:00
9.9kts
10.9kts
0.6m
10.7sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
14:00
10.5kts
11.9kts
0.6m
9.6sec
0mm
0%
16°C
15°C
  • ●
  • ●
  • ●
17:00
8.6kts
10.9kts
0.6m
9.2sec
0mm
0%
16°C
16°C
  • ●
  • ●
  • ●
20:00
5.9kts
7.4kts
0.6m
9sec
0mm
0%
15°C
16°C
  • ●
  • ●
  • ●
23:00
6.8kts
8.6kts
0.6m
9.6sec
0mm
0%
15°C
15°C
  • ●
  • ●
  • ●

Sunrise: 07:14 / Sunset: 17:58 Twilight: 06:46 / 18:26

Tuesday 27 October

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
10.4kts
17kts
0.6m
9.5sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
05:00
15.1kts
20.9kts
0.7m
9sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
08:00
14.8kts
17.7kts
1m
6sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
11:00
13.4kts
14.2kts
1m
10.7sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
14:00
10.2kts
11.6kts
0.9m
10.2sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
17:00
8.6kts
9.4kts
0.9m
9.8sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
20:00
7.3kts
8.4kts
1m
9.5sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
23:00
7.1kts
7.7kts
1m
9.3sec
0mm
0%
14°C
12°C
  • ●
  • ●
  • ●

Sunrise: 07:16 / Sunset: 17:56 Twilight: 06:47 / 18:25

Wednesday 28 October

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
8.7kts
8.8kts
1m
9.2sec
0mm
1%
14°C
11°C
  • ●
  • ●
  • ●
05:00
9.9kts
9.7kts
1m
9sec
0mm
11%
14°C
11°C
  • ●
  • ●
  • ●
08:00
10.1kts
9.8kts
1m
9sec
0mm
13%
14°C
10°C
  • ●
  • ●
  • ●
11:00
8.6kts
8.2kts
0.9m
8.9sec
0mm
7%
15°C
11°C
  • ●
  • ●
  • ●
14:00
6.8kts
6.2kts
0.9m
8.7sec
0mm
3%
15°C
11°C
  • ●
  • ●
  • ●
17:00
6.7kts
6.6kts
0.8m
8.5sec
0mm
0%
15°C
12°C
  • ●
  • ●
  • ●
20:00
6.1kts
6.8kts
0.7m
8.4sec
0mm
0%
14°C
11°C
  • ●
  • ●
  • ●
23:00
6.6kts
7.4kts
0.7m
8.2sec
0mm
0%
14°C
11°C
  • ●
  • ●
  • ●

Sunrise: 07:17 / Sunset: 17:55 Twilight: 06:49 / 18:23

Thursday 29 October

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
5.5kts
6.3kts
0.7m
8.1sec
0mm
0%
14°C
12°C
  • ●
  • ●
  • ●
05:00
3.6kts
4.7kts
0.7m
7.9sec
0mm
0%
14°C
12°C
  • ●
  • ●
  • ●
08:00
2.7kts
4kts
0.6m
7.9sec
0mm
0%
14°C
12°C
  • ●
  • ●
  • ●
11:00
2.4kts
3.6kts
0.6m
7.8sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
14:00
4.8kts
6.5kts
0.6m
7.8sec
0mm
0%
16°C
14°C
  • ●
  • ●
  • ●
17:00
7.7kts
8.9kts
0.6m
7.8sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
20:00
9.4kts
11kts
0.6m
7.7sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
23:00
10kts
13.2kts
0.6m
7.6sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●

Sunrise: 07:18 / Sunset: 17:54 Twilight: 06:50 / 18:22

Friday 30 October

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
11kts
14.2kts
0.7m
7.5sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●
05:00
11.8kts
15.9kts
0.7m
7.5sec
0mm
0%
14°C
13°C
  • ●
  • ●
  • ●
08:00
11.6kts
15kts
0.8m
7.4sec
0mm
0%
15°C
13°C
  • ●
  • ●
  • ●
11:00
10.1kts
12.6kts
0.8m
7.5sec
0mm
0%
15°C
15°C
  • ●
  • ●
  • ●
14:00
6.3kts
9.8kts
0.8m
8.3sec
0mm
0%
16°C
16°C
  • ●
  • ●
  • ●
17:00
10.1kts
13.2kts
0.7m
8sec
0mm
0%
15°C
17°C
  • ●
  • ●
  • ●
20:00
14.2kts
22.9kts
0.8m
7.6sec
0mm
0%
15°C
15°C
  • ●
  • ●
  • ●
23:00
16.2kts
23.4kts
0.9m
7.6sec
0mm
0%
15°C
14°C
  • ●
  • ●
  • ●

Sunrise: 07:19 / Sunset: 17:53 Twilight: 06:51 / 18:21

Saturday 31 October

Wind Gust Swell Period Rain Cloud Temp Chill [Wind rating]
02:00
15.8kts
20.6kts
1m
8.2sec
0mm
2%
15°C
13°C
  • ●
  • ●
  • ●
05:00
18kts
21.5kts
1.4m
5sec
0.1mm
15%
15°C
13°C
  • ●
  • ●
  • ●
08:00
20.9kts
22.7kts
1.8m
6.1sec
0.3mm
51%
14°C
11°C
  • ●
  • ●
  • ●
11:00
18.9kts
21kts
1.9m
6.6sec
0mm
39%
15°C
11°C
  • ●
  • ●
  • ●
14:00
16.3kts
18.5kts
1.8m
7.3sec
0mm
20%
15°C
12°C
  • ●
  • ●
  • ●

Sunrise: 07:20 / Sunset: 17:51 Twilight: 06:52 / 18:20

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