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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
E 18kt⇓
< 1ft
Sunday
SW 16kt
< 1ft
Sunday Night
W 13kt
< 1ft
Monday
WNW 12kt
< 1ft
Monday Night
W 8kt
< 1ft
Tuesday
WNW 15kt
< 1ft
Tuesday Night
NW 11kt
< 1ft
Wednesday
NNE 7kt
< 1ft
Wednesday Night
S 7kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:50 pm EDT Apr 4, 2026
Forecast Valid: 9pm EDT Apr 4, 2026-6pm EDT Apr 11, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SUNDAY NIGHT...

Tonight

E wind 15 to 18 kt decreasing to 11 to 14 kt after midnight. Winds could gust as high as 27 kt. A chance of showers after 11pm. Areas of dense fog after 2am. Seas 1 ft or less.

Sunday

SW wind 11 to 16 kt. Showers, mainly between 11am and 5pm. Areas of dense fog before 11am. Seas 1 ft or less.

Sunday Night

WSW wind around 13 kt becoming NW after midnight. A chance of showers before 8pm. Seas 1 ft or less.

Monday

WNW wind around 12 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.

Monday Night

W wind around 8 kt. Partly cloudy. Seas 1 ft or less.

Tuesday

WNW wind 12 to 15 kt. Mostly sunny. Seas 1 ft or less.

Tuesday Night

NW wind 9 to 11 kt. Mostly clear. Seas 1 ft or less.

Wednesday

NNE wind around 7 kt becoming SSE in the afternoon. Sunny. Seas 1 ft or less.

Wednesday Night

S wind around 7 kt. Mostly clear. Seas 1 ft or less.

*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.