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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

This Afternoon
NNE 12kt
3ft
Tonight
NNE 12kt
3ft
Wednesday
NNE 10kt
3ft
Wednesday Night
SW 12kt
3ft
Thursday
SSW 14kt
3ft
Thursday Night
SSW 16kt⇓
3-4ft
Friday
SW 10kt
2ft
Friday Night
W 10kt
2-3ft
Saturday
N 8kt
2ft

Associated Zone Forecast which includes this point

Last Update: 2:36 pm EDT Jul 7, 2026
Forecast Valid: 2pm EDT Jul 7, 2026-6pm EDT Jul 13, 2026

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Detailed Forecast

This Afternoon

NNE wind around 12 kt. A slight chance of rain. Seas around 3 ft.

Tonight

NNE wind around 12 kt. A slight chance of rain before 8pm. Seas around 3 ft.

Wednesday

NNE wind 6 to 10 kt becoming S in the afternoon. Mostly sunny. Seas around 3 ft.

Wednesday Night

SW wind 10 to 12 kt. Increasing clouds. Seas around 3 ft.

Thursday

WSW wind 9 to 14 kt becoming SSW in the afternoon. A slight chance of showers and thunderstorms after 2pm. Seas around 3 ft.

Thursday Night

SSW wind 13 to 16 kt becoming WSW 10 to 13 kt after midnight. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Seas 3 to 4 ft.

Friday

SW wind 8 to 10 kt. Mostly sunny. Seas around 2 ft.

Friday Night

W wind 7 to 10 kt. Mostly cloudy. Seas 2 to 3 ft.

Saturday

N wind 6 to 8 kt becoming ESE in the afternoon. Mostly sunny. Seas around 2 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.