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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Today
SSW 7kt
2ft
Tonight
⇑NNE 10kt
2ft
Sunday
NNE 13kt
2ft
Sunday Night
NNW 16kt
2-3ft
Monday
N 13kt⇓
2ft
Monday Night
SE 9kt
2ft
Tuesday
S 14kt
2-3ft
Tuesday Night
SSW 17kt
3-4ft
Wednesday
WSW 14kt⇓
4ft

Associated Zone Forecast which includes this point

Last Update: 9:41 am EST Feb 28, 2026
Forecast Valid: 10am EST Feb 28, 2026-6pm EST Mar 6, 2026

View Nearby Observations

Detailed Forecast

Today

SSW wind around 7 kt. Mostly sunny. Seas around 2 ft.

Tonight

Variable winds less than 5 kt becoming NNE 5 to 10 kt after midnight. Patchy fog between 8pm and 10pm, then Patchy fog between midnight and 1am. Seas around 2 ft.

Sunday

NNE wind 11 to 13 kt becoming N in the afternoon. Snow likely, mainly between 10am and 4pm. Seas around 2 ft.

Sunday Night

NNW wind 14 to 16 kt, with gusts as high as 22 kt. A slight chance of snow before 7pm. Widespread freezing spray, mainly between 1am and 4am. Seas 2 to 3 ft.

Monday

N wind 10 to 13 kt decreasing to 7 to 10 kt in the afternoon. Sunny. Seas around 2 ft.

Monday Night

NE wind 5 to 9 kt becoming SE after midnight. Mostly clear. Seas around 2 ft.

Tuesday

S wind 9 to 14 kt. A chance of rain after 1pm. Seas 2 to 3 ft.

Tuesday Night

S wind 14 to 17 kt becoming SW after midnight. Rain. Seas 3 to 4 ft.

Wednesday

WSW wind 11 to 14 kt becoming N 8 to 11 kt in the afternoon. A chance of rain. Seas around 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.