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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
WNW 16kt⇓
5ft
Sunday
ESE 15kt
2ft
Sunday Night
⇑ESE 21kt
4ft
Monday
S 28kt
11ft
Monday Night
S 35kt⇓
15ft
Tuesday
W 28kt
10ft
Tuesday Night
WNW 26kt⇓
7ft
Wednesday
NW 11kt
4ft
Wednesday Night
S 11kt
3-4ft

Associated Zone Forecast which includes this point

Last Update: 2:22 pm EDT Mar 14, 2026
Forecast Valid: 4pm EDT Mar 14, 2026-6pm EDT Mar 21, 2026

View Nearby Observations

Detailed Forecast

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

Tonight

WNW wind 13 to 16 kt becoming NNW 8 to 11 kt after midnight. Winds could gust as high as 26 kt. Increasing clouds. Seas 5 ft subsiding to 2 ft.

Sunday

ENE wind 10 to 15 kt becoming ESE in the afternoon. Partly sunny. Seas around 2 ft.

Sunday Night

ESE wind 13 to 16 kt increasing to 18 to 21 kt after midnight. Winds could gust as high as 30 kt. Showers, mainly after 2am. Seas 2 ft building to 4 ft.

Monday

S wind 24 to 28 kt, with gusts as high as 39 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 7 ft building to 11 ft.

Monday Night

S wind 32 to 35 kt becoming SW 28 to 31 kt after midnight. Winds could gust as high as 44 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 15 ft subsiding to 13 ft.

Tuesday

W wind 24 to 28 kt, with gusts as high as 34 kt. A chance of showers before 8am. Seas 10 ft subsiding to 8 ft.

Tuesday Night

WNW wind 23 to 26 kt decreasing to 18 to 21 kt after midnight. Partly cloudy. Seas 7 ft subsiding to 5 ft.

Wednesday

NW wind 6 to 11 kt becoming SW in the afternoon. Mostly sunny. Seas around 4 ft.

Wednesday Night

S wind 9 to 11 kt. Mostly cloudy. Seas 3 to 4 ft.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.