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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

This Afternoon
S 28kt
9-10ft

Gale Warning
Tonight
S 36kt⇓
12-13ft

Gale Warning
Tuesday
W 27kt
10ft
Tuesday Night
WNW 22kt⇓
6-7ft
Wednesday
NW 11kt⇓
4-5ft
Wednesday Night
S 10kt
4ft
Thursday
S 11kt
4ft
Thursday Night
S 10kt
3-4ft
Friday
SW 11kt
3ft

Associated Zone Forecast which includes this point

Last Update: 1:51 pm EDT Mar 16, 2026
Forecast Valid: 1pm EDT Mar 16, 2026-6pm EDT Mar 22, 2026

View Nearby Observations

Detailed Forecast

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

This Afternoon

S wind around 28 kt, with gusts as high as 37 kt. Showers and possibly a thunderstorm. Areas of fog. Seas 9 to 10 ft.

Tonight

S wind 33 to 36 kt becoming W 28 to 31 kt after midnight. Winds could gust as high as 50 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers. Areas of fog before 2am. Seas 12 to 13 ft.

Tuesday

W wind 22 to 27 kt. Sunny. Seas 10 ft subsiding to 8 ft.

Tuesday Night

WNW wind 19 to 22 kt decreasing to 16 to 19 kt after midnight. Mostly clear. Seas 6 to 7 ft.

Wednesday

NW wind 8 to 11 kt becoming W 5 to 8 kt in the afternoon. Increasing clouds. Seas 4 to 5 ft.

Wednesday Night

S wind 8 to 10 kt. Partly cloudy. Seas around 4 ft.

Thursday

S wind 8 to 11 kt. Partly sunny. Seas around 4 ft.

Thursday Night

S wind 8 to 10 kt becoming WSW after midnight. Mostly cloudy. Seas 3 to 4 ft.

Friday

W wind 8 to 11 kt becoming SW in the afternoon. Mostly sunny. Seas around 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.