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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Wednesday
SSE 19kt⇓
4ft

Small Craft Advisory
Wednesday Night
NNE 6kt
3ft
Thursday
W 10kt
2ft
Thursday Night
NW 11kt
2-3ft
Friday
W 7kt
2ft
Friday Night
SE 9kt
2ft
Saturday
E 14kt
2ft
Saturday Night
E 16kt
3-4ft
Sunday
ENE 19kt
4ft

Associated Zone Forecast which includes this point

Last Update: 3:50 pm EDT Apr 21, 2026
Forecast Valid: 1am EDT Apr 22, 2026-6pm EDT Apr 28, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH

Wednesday

SSE wind 16 to 19 kt decreasing to 12 to 15 kt in the afternoon. Winds could gust as high as 27 kt. A chance of showers, mainly before 11am. Seas around 4 ft.

Wednesday Night

NNE wind around 6 kt. Partly cloudy. Seas around 3 ft.

Thursday

NW wind 6 to 10 kt becoming WSW in the afternoon. Mostly sunny. Seas around 2 ft.

Thursday Night

NW wind 8 to 11 kt becoming N after midnight. Mostly cloudy. Seas 2 to 3 ft.

Friday

N wind around 7 kt becoming SSW in the afternoon. A slight chance of showers. Seas around 2 ft.

Friday Night

S wind around 9 kt becoming SE after midnight. A chance of showers after 2am. Seas around 2 ft.

Saturday

E wind 12 to 14 kt. A chance of showers. Seas around 2 ft.

Saturday Night

E wind 14 to 16 kt. A chance of showers. Seas 3 to 4 ft.

Sunday

ENE wind 16 to 19 kt. A chance of showers. 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.