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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Today
N 11kt⇓
4ft
Tonight
SSW 11kt
3ft
Tuesday
N 11kt⇓
2-3ft
Tuesday Night
SSW 12kt
3ft
Wednesday
⇑S 22kt
5ft
Wednesday Night
S 21kt
5-6ft
Thursday
SSW 12kt
4ft
Thursday Night
NW 8kt
3ft
Friday
NW 9kt
3ft

Associated Zone Forecast which includes this point

Last Update: 5:59 am EDT May 11, 2026
Forecast Valid: 7am EDT May 11, 2026-6pm EDT May 17, 2026

View Nearby Observations

Detailed Forecast

Today

N wind 6 to 11 kt becoming variable and less than 5 kt. Mostly cloudy. Seas around 4 ft.

Tonight

SSW wind 7 to 11 kt becoming N after midnight. Partly cloudy. Seas around 3 ft.

Tuesday

N wind 6 to 11 kt becoming variable and less than 5 kt. Sunny. Seas 2 to 3 ft.

Tuesday Night

SSW wind around 12 kt. Increasing clouds. Seas around 3 ft.

Wednesday

S wind 14 to 17 kt increasing to 19 to 22 kt in the afternoon. Winds could gust as high as 29 kt. A chance of showers, mainly after 2pm. Seas 3 ft building to 5 ft.

Wednesday Night

S wind 18 to 21 kt, with gusts as high as 27 kt. Showers, with thunderstorms also possible after 2am. Seas 5 to 6 ft.

Thursday

SSW wind 9 to 12 kt. Showers likely, mainly before noon. Seas around 4 ft.

Thursday Night

NW wind 6 to 8 kt. Mostly cloudy. Seas around 3 ft.

Friday

NW wind 7 to 9 kt becoming W in the afternoon. Mostly sunny. 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.