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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Today
NNW 18kt⇓
2-3ft
Tonight
NNE 11kt
2ft
Sunday
⇑NE 26kt
5ft
Sunday Night
ENE 28kt⇓
7-8ft
Monday
NW 21kt
7-8ft
Monday Night
WNW 26kt
6-7ft
Tuesday
W 25kt
5-6ft
Tuesday Night
W 25kt
6ft
Wednesday
WNW 21kt
3-4ft

Associated Zone Forecast which includes this point

Last Update: 1:05 am EST Jan 24, 2026
Forecast Valid: 8am EST Jan 24, 2026-6pm EST Jan 30, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EST THIS AFTERNOON...

Today

NNW wind 15 to 18 kt decreasing to 12 to 15 kt in the afternoon. Winds could gust as high as 24 kt. Widespread freezing spray before 1pm. Partly sunny. Seas 2 to 3 ft.

Tonight

N wind around 11 kt becoming NNE after midnight. A chance of snow after 4am. Seas around 2 ft.

Sunday

NE wind 14 to 19 kt increasing to 21 to 26 kt in the afternoon. Winds could gust as high as 32 kt. Snow before 4pm, then snow, possibly mixed with sleet. The snow could be heavy at times. Widespread freezing spray between 10am and 4pm. Seas 2 ft building to 5 ft.

Sunday Night

ENE wind 25 to 28 kt decreasing to 19 to 22 kt after midnight. Winds could gust as high as 37 kt. Rain, snow, and sleet before 1am, then rain and sleet between 1am and 4am, then rain and snow, possibly mixed with sleet after 4am. Seas 7 to 8 ft.

Monday

NNE wind 16 to 21 kt becoming NW in the afternoon. Winds could gust as high as 28 kt. Snow, possibly mixed with sleet, becoming all snow after 7am. Seas 7 to 8 ft.

Monday Night

WNW wind around 26 kt, with gusts as high as 33 kt. Partly cloudy. Seas 6 to 7 ft.

Tuesday

W wind 21 to 25 kt. Mostly sunny. Seas 5 to 6 ft.

Tuesday Night

W wind 21 to 25 kt. Partly cloudy. Seas 6 ft subsiding to 4 ft.

Wednesday

WNW wind 18 to 21 kt. Mostly sunny. Seas 3 to 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.