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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
Light Wind
< 1ft
Wednesday
Light Wind
< 1ft
Wednesday Night
SSW 6kt⇓
< 1ft
Thursday
Light Wind
< 1ft
Thursday Night
Light Wind
< 1ft
Friday
N 7kt⇓
< 1ft
Friday Night
Light Wind
< 1ft
Saturday
E 9kt
< 1ft
Saturday Night
E 6kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:34 pm EDT Aug 18, 2026
Forecast Valid: 8pm EDT Aug 18, 2026-6pm EDT Aug 25, 2026

View Nearby Observations

Detailed Forecast

Tonight

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

Wednesday

Variable winds 5 kt or less. Partly sunny, then gradually becoming sunny. Seas 1 ft or less.

Wednesday Night

SSW wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Seas 1 ft or less.

Friday

N wind 5 to 7 kt becoming variable and less than 5 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. A chance of showers after 2am. Seas 1 ft or less.

Saturday

E wind 7 to 9 kt. A chance of showers. Seas 1 ft or less.

Saturday Night

E wind around 6 kt. A chance of showers. Seas 1 ft or less.

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.