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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Overnight
NW 21kt
3ft

Small Craft Advisory
Friday
WNW 19kt
3ft

Small Craft Advisory
Friday Night
NW 18kt
2-3ft
Saturday
N 13kt
1ft
Saturday Night
⇑N 31kt
4ft
Sunday
N 30kt
5-6ft
Sunday Night
NW 28kt
6ft
Monday
NW 22kt
5-6ft
Monday Night
NW 16kt
4-5ft

Associated Zone Forecast which includes this point

Last Update: 1:13 pm EST Jan 29, 2026
Forecast Valid: 12am EST Jan 30, 2026-6pm EST Feb 5, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING

Overnight

NW wind around 21 kt. Widespread freezing spray. Mostly clear. Seas around 3 ft.

Friday

WNW wind around 19 kt. Widespread freezing spray. Sunny. Seas around 3 ft.

Friday Night

NW wind 13 to 18 kt. Partly cloudy. Seas 2 to 3 ft.

Saturday

N wind 10 to 13 kt. Partly sunny. Seas around 1 ft.

Saturday Night

N wind 17 to 22 kt increasing to 26 to 31 kt. Winds could gust as high as 37 kt. A chance of snow, mainly after 1am. Widespread freezing spray after 1am. Seas 2 ft building to 4 ft.

Sunday

N wind 27 to 30 kt, with gusts as high as 42 kt. A chance of snow. Seas 5 to 6 ft.

Sunday Night

NW wind 24 to 28 kt. Mostly cloudy. Seas around 6 ft.

Monday

NW wind 17 to 22 kt. Mostly sunny. Seas 5 to 6 ft.

Monday Night

NW wind around 16 kt. Partly cloudy. Seas 4 to 5 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.