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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

Tuesday
WNW 6kt
1ft
Tuesday Night
Light Wind
< 1ft
Wednesday
NNE 6kt⇓
< 1ft
Wednesday Night
Light Wind
< 1ft
Thursday
⇑SW 7kt
< 1ft
Thursday Night
WNW 7kt
1ft
Friday
NW 9kt
1ft
Friday Night
NNW 11kt
1ft
Saturday
NNW 9kt
1ft

Associated Zone Forecast which includes this point

Last Update: 3:05 am EDT Aug 11, 2026
Forecast Valid: 3am EDT Aug 11, 2026-6pm EDT Aug 17, 2026

View Nearby Observations

Detailed Forecast

Tuesday

WNW wind around 6 kt. A slight chance of showers and thunderstorms after 2pm. Seas around 1 ft.

Tuesday Night

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

Wednesday

NNE wind around 6 kt becoming variable and less than 5 kt in the afternoon. A chance of showers, mainly before 8am. Seas 1 ft or less.

Wednesday Night

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

Thursday

Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Seas 1 ft or less.

Thursday Night

WSW wind around 7 kt becoming WNW after midnight. A chance of showers before 8pm. Seas around 1 ft.

Friday

NW wind around 9 kt. Sunny. Seas around 1 ft.

Friday Night

NNW wind around 11 kt. Mostly clear. Seas around 1 ft.

Saturday

NNW wind 6 to 9 kt. Sunny. Seas around 1 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.