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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
S 10kt
< 1ft
Friday
N 10kt
< 1ft
Friday Night
NE 13kt
< 1ft
Saturday
NE 11kt⇓
< 1ft
Saturday Night
SE 7kt
< 1ft
Sunday
SE 10kt
< 1ft
Sunday Night
NNE 11kt
< 1ft
Monday
NNE 13kt
1ft
Monday Night
NE 15kt
1ft

Associated Zone Forecast which includes this point

Last Update: 2:41 pm EDT Sep 17, 2026
Forecast Valid: 7pm EDT Sep 17, 2026-6pm EDT Sep 24, 2026

View Nearby Observations

Detailed Forecast

Tonight

S wind 6 to 10 kt becoming W 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

N wind 8 to 10 kt. Sunny. Seas 1 ft or less.

Friday Night

N wind 9 to 13 kt becoming NE after midnight. Partly cloudy. Seas 1 ft or less.

Saturday

NE wind 8 to 11 kt becoming ENE 5 to 8 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Saturday Night

SE wind around 7 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

ESE wind around 10 kt becoming SSE in the afternoon. Showers, mainly after noon. Seas 1 ft or less.

Sunday Night

S wind 8 to 11 kt becoming NNE after midnight. Showers, mainly before 2am. Seas 1 ft or less.

Monday

NNE wind 10 to 13 kt, with gusts as high as 20 kt. A chance of showers. Seas around 1 ft.

Monday Night

NE wind 11 to 15 kt, with gusts as high as 22 kt. A chance of showers. 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.