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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
W 7kt
< 1ft
Friday
⇑S 8kt
< 1ft
Friday Night
NNE 7kt
< 1ft
Saturday
NE 9kt
< 1ft
Saturday Night
SSE 8kt
< 1ft
Sunday
⇑S 17kt
< 1ft
Sunday Night
S 16kt
< 1ft
Monday
W 10kt
< 1ft
Monday Night
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 8:32 pm EDT Aug 13, 2026
Forecast Valid: 9pm EDT Aug 13, 2026-6pm EDT Aug 20, 2026

View Nearby Observations

Detailed Forecast

Tonight

W wind around 7 kt becoming NNW after midnight. Partly cloudy. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Friday Night

S wind 5 to 7 kt becoming NNE after midnight. Partly cloudy. Seas 1 ft or less.

Saturday

NE wind 7 to 9 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

SSE wind 6 to 8 kt becoming SSW after midnight. Partly cloudy. Seas 1 ft or less.

Sunday

S wind 7 to 12 kt increasing to 12 to 17 kt in the afternoon. Showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Sunday Night

S wind 13 to 16 kt becoming WSW after midnight. Winds could gust as high as 23 kt. Showers likely and possibly a thunderstorm before 2am. Seas 1 ft or less.

Monday

W wind 8 to 10 kt. A chance of showers. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. 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.