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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
NNW 11kt
3ft
Tuesday
N 11kt
2-3ft
Tuesday Night
SSW 15kt
3ft
Wednesday
⇑S 26kt
6ft
Wednesday Night
S 24kt
6-7ft
Thursday
S 12kt
3-4ft
Thursday Night
NW 11kt
3ft
Friday
WNW 11kt
3ft
Friday Night
W 10kt
3ft

Associated Zone Forecast which includes this point

Last Update: 8:30 pm EDT May 11, 2026
Forecast Valid: 9pm EDT May 11, 2026-6pm EDT May 18, 2026

View Nearby Observations

Detailed Forecast

Tonight

SW wind 7 to 11 kt becoming NNW after midnight. A chance of sprinkles. Seas around 3 ft.

Tuesday

N wind 6 to 11 kt becoming SSW in the afternoon. Sunny. Seas 2 to 3 ft.

Tuesday Night

SSW wind around 15 kt. Increasing clouds. Seas around 3 ft.

Wednesday

S wind 18 to 21 kt increasing to 23 to 26 kt in the afternoon. Winds could gust as high as 32 kt. A chance of showers after 2pm. Seas 4 ft building to 6 ft.

Wednesday Night

S wind 21 to 24 kt, with gusts as high as 31 kt. A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 5am, then showers after 5am. Seas 6 to 7 ft.

Thursday

S wind 8 to 12 kt. Showers likely, mainly before 2pm. Seas 3 to 4 ft.

Thursday Night

NW wind 7 to 11 kt. A chance of showers before 8pm. Seas around 3 ft.

Friday

WNW wind around 11 kt. Mostly sunny. Seas around 3 ft.

Friday Night

W wind around 10 kt. Partly cloudy. Seas around 3 ft.

Winds and seas may be higher in and near tstms.

*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.