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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Today
NNE 12kt
< 1ft
Tonight
NNE 11kt
< 1ft
Wednesday
NNE 8kt
< 1ft
Wednesday Night
SSW 8kt
< 1ft
Thursday
SSW 12kt
< 1ft
Thursday Night
SSW 14kt⇓
< 1ft
Friday
WSW 9kt
< 1ft
Friday Night
W 6kt
< 1ft
Saturday
N 7kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 8:27 am EDT Jul 7, 2026
Forecast Valid: 9am EDT Jul 7, 2026-6pm EDT Jul 13, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

Today

NNE wind around 12 kt. A chance of rain, mainly before 2pm. Seas 1 ft or less.

Tonight

NNE wind 8 to 11 kt. A slight chance of rain before 8pm. Seas 1 ft or less.

Wednesday

NNE wind 5 to 8 kt becoming S in the afternoon. Mostly sunny. Seas 1 ft or less.

Wednesday Night

SSW wind around 8 kt. Partly cloudy. Seas 1 ft or less.

Thursday

SSW wind 7 to 12 kt. Partly sunny. Seas 1 ft or less.

Thursday Night

SSW wind 11 to 14 kt becoming SW 8 to 11 kt after midnight. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Seas 1 ft or less.

Friday

WSW wind 7 to 9 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Friday Night

W wind around 6 kt becoming NW after midnight. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.

Saturday

N wind around 7 kt becoming NE in the afternoon. Mostly sunny. Seas 1 ft or less.

*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.