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New York, NY Local Forecast Office

15NM WSW Islip NY

Marine Point Forecast

[NOTICE]

This Afternoon
NW 10kt
1ft
Tonight
Light Wind
< 1ft
Tuesday
SSW 12kt
1ft
Tuesday Night
S 15kt
1-2ft
Wednesday
SSW 12kt
1ft
Wednesday Night
⇑W 18kt
1-2ft
Thanksgiving Day
W 20kt
1ft
Thursday Night
W 22kt
1ft
Friday
W 22kt
1ft

Associated Zone Forecast which includes this point

Last Update: 1:18 pm EST Nov 24, 2025
Forecast Valid: 2pm EST Nov 24, 2025-6pm EST Nov 30, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

NW wind 7 to 10 kt. Sunny. Seas around 1 ft.

Tonight

Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

Tuesday

SSW wind 8 to 12 kt. A chance of rain after 1pm. Seas around 1 ft.

Tuesday Night

SSE wind 12 to 15 kt becoming SSW after midnight. Rain. Seas 1 to 2 ft.

Wednesday

SSW wind 9 to 12 kt. Rain likely, mainly before noon. Seas around 1 ft.

Wednesday Night

SW wind 12 to 15 kt becoming W 15 to 18 kt after midnight. Winds could gust as high as 24 kt. Mostly cloudy, then gradually becoming mostly clear. Seas 1 to 2 ft.

Thanksgiving Day

W wind 18 to 20 kt, with gusts as high as 28 kt. Mostly sunny. Seas around 1 ft.

Thursday Night

W wind around 22 kt. Mostly clear. Seas around 1 ft.

Friday

W wind 20 to 22 kt, with gusts as high as 33 kt. Mostly sunny. Seas around 1 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.