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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
⇑NNW 21kt
< 1ft
Saturday
N 22kt
1ft
Saturday Night
N 18kt
1ft
Sunday
NE 12kt⇓
< 1ft
Sunday Night
⇑ENE 14kt
< 1ft
Monday
NE 19kt
1ft
Monday Night
NNE 17kt
1ft
Tuesday
NNE 16kt
1ft
Tuesday Night
NNE 18kt
1ft

Associated Zone Forecast which includes this point

Last Update: 4:08 pm EDT Oct 16, 2026
Forecast Valid: 7pm EDT Oct 16, 2026-6pm EDT Oct 23, 2026

View Nearby Observations

Detailed Forecast

...SEVERE THUNDERSTORM WATCH 687 IN EFFECT UNTIL 10 PM EDT THIS

Tonight

WNW wind 12 to 15 kt becoming NNW 18 to 21 kt after midnight. Showers and possibly a thunderstorm before 11pm, then a slight chance of showers between 11pm and 2am, then a chance of rain after 2am. Seas 1 ft or less.

Saturday

N wind 18 to 22 kt. A chance of rain before 11am. Seas around 1 ft.

Saturday Night

N wind 16 to 18 kt. Mostly clear. Seas around 1 ft.

Sunday

NE wind 9 to 12 kt decreasing to 6 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.

Sunday Night

ENE wind 7 to 10 kt increasing to 11 to 14 kt after midnight. Mostly clear. Seas 1 ft or less.

Monday

NE wind 15 to 19 kt. Mostly sunny. Seas around 1 ft.

Monday Night

NNE wind around 17 kt, with gusts as high as 25 kt. Mostly cloudy. Seas around 1 ft.

Tuesday

NNE wind 11 to 16 kt, with gusts as high as 23 kt. Partly sunny. Seas around 1 ft.

Tuesday Night

NNE wind 13 to 18 kt, with gusts as high as 26 kt. Partly cloudy. 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.