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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
NW 6kt
< 1ft
Friday
Light Wind
< 1ft
Friday Night
⇑NE 7kt
< 1ft
Saturday
NNE 8kt⇓
< 1ft
Saturday Night
Light Wind
< 1ft
Sunday
⇑S 11kt
< 1ft
Sunday Night
S 14kt
< 1ft
Monday
WNW 9kt
< 1ft
Monday Night
N 6kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:19 pm EDT Aug 13, 2026
Forecast Valid: 6pm EDT Aug 13, 2026-6pm EDT Aug 20, 2026

View Nearby Observations

Detailed Forecast

Tonight

NW wind around 6 kt. A slight chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

Friday

Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.

Friday Night

Variable winds less than 5 kt becoming NE 5 to 7 kt after midnight. Partly cloudy. Seas 1 ft or less.

Saturday

NNE wind 5 to 8 kt becoming variable and less than 5 kt in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

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

Sunday

S wind 5 to 8 kt increasing to 8 to 11 kt in the afternoon. Showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Sunday Night

S wind 11 to 14 kt becoming WSW after midnight. Winds could gust as high as 21 kt. Showers and possibly a thunderstorm, mainly before 2am. Seas 1 ft or less.

Monday

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

Monday Night

N 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.