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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Sunday
⇑S 19kt
2-3ft

Small Craft Advisory
Sunday Night
S 22kt⇓
4-5ft

Small Craft Advisory
Monday
W 15kt
3ft
Monday Night
WNW 10kt
3ft
Tuesday
⇑S 12kt
2ft
Tuesday Night
S 12kt⇓
2-3ft
Wednesday
⇑SSE 13kt
2-3ft
Wednesday Night
S 11kt
3ft
Thursday
⇑S 25kt
7ft

Associated Zone Forecast which includes this point

Last Update: 2:23 pm EDT Jun 13, 2026
Forecast Valid: 2am EDT Jun 14, 2026-6pm EDT Jun 20, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY AFTERNOON THROUGH

Sunday

SW wind 6 to 9 kt becoming S 14 to 19 kt. Increasing clouds. Seas 2 to 3 ft.

Sunday Night

S wind 19 to 22 kt becoming SW 15 to 18 kt after midnight. Winds could gust as high as 29 kt. Showers and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a slight chance of showers after 2am. Seas 4 to 5 ft.

Monday

W wind 11 to 15 kt. Mostly sunny. Seas around 3 ft.

Monday Night

WNW wind 6 to 10 kt becoming NNW after midnight. Partly cloudy. Seas around 3 ft.

Tuesday

Variable winds less than 5 kt becoming S 7 to 12 kt in the morning. Mostly sunny. Seas around 2 ft.

Tuesday Night

S wind 9 to 12 kt decreasing to 6 to 9 kt after midnight. Partly cloudy. Seas 2 to 3 ft.

Wednesday

SSE wind 5 to 8 kt increasing to 10 to 13 kt in the afternoon. A chance of showers after 2pm. Seas 2 to 3 ft.

Wednesday Night

S wind 8 to 11 kt. A chance of showers. Seas around 3 ft.

Thursday

S wind 14 to 19 kt increasing to 20 to 25 kt in the afternoon. Winds could gust as high as 32 kt. A chance of showers. Seas 3 ft building to 7 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.