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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
SW 19kt⇓
4ft

Small Craft Advisory
Thursday
SW 12kt
3ft
Thursday Night
W 10kt
3ft
Friday
SSW 12kt
2-3ft
Friday Night
SW 11kt
2ft
Saturday
W 10kt
2ft
Saturday Night
WSW 9kt⇓
2ft
Sunday
⇑S 17kt
2-3ft
Sunday Night
SSW 22kt⇓
5ft

Associated Zone Forecast which includes this point

Last Update: 2:23 pm EDT Jun 10, 2026
Forecast Valid: 6pm EDT Jun 10, 2026-6pm EDT Jun 17, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING

Tonight

SW wind 16 to 19 kt decreasing to 12 to 15 kt after midnight. A chance of showers and thunderstorms before 2am, then a slight chance of showers. Seas around 4 ft.

Thursday

SW wind 10 to 12 kt. A chance of thunderstorms after 5pm. Seas around 3 ft.

Thursday Night

W wind 8 to 10 kt. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Seas around 3 ft.

Friday

W wind 7 to 12 kt becoming SSW in the afternoon. A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Seas 2 to 3 ft.

Friday Night

SW wind around 11 kt becoming NW after midnight. A chance of showers and thunderstorms before 2am. Seas around 2 ft.

Saturday

NW wind 7 to 10 kt becoming W in the afternoon. Sunny. Seas around 2 ft.

Saturday Night

WSW wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas around 2 ft.

Sunday

Variable winds less than 5 kt becoming S 12 to 17 kt in the morning. Sunny. Seas 2 to 3 ft.

Sunday Night

SSW wind 19 to 22 kt becoming WSW 14 to 17 kt after midnight. Winds could gust as high as 28 kt. A chance of showers. Seas 5 ft subsiding to 3 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.