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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
S 12kt
< 1ft
Sunday
SSE 13kt
< 1ft
Sunday Night
S 15kt
< 1ft
Monday
SSW 14kt
< 1ft
Monday Night
SSW 9kt
< 1ft
Tuesday
S 7kt
< 1ft
Tuesday Night
SSW 7kt
< 1ft
Wednesday
⇑S 11kt
< 1ft
Wednesday Night
SSW 13kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:00 pm EDT Aug 1, 2026
Forecast Valid: 8pm EDT Aug 1, 2026-6pm EDT Aug 8, 2026

View Nearby Observations

Detailed Forecast

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

Tonight

S wind 9 to 12 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

SSE wind 9 to 13 kt. A slight chance of showers and thunderstorms after 5pm. Seas 1 ft or less.

Sunday Night

SE wind 11 to 15 kt becoming S after midnight. A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Seas 1 ft or less.

Monday

SSW wind around 14 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

Monday Night

SSW wind 6 to 9 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Tuesday

NW wind around 7 kt becoming S in the morning. Partly sunny. Seas 1 ft or less.

Tuesday Night

SSW wind 5 to 7 kt. Mostly cloudy. Seas 1 ft or less.

Wednesday

S wind 5 to 8 kt increasing to 8 to 11 kt in the afternoon. Partly sunny. Seas 1 ft or less.

Wednesday Night

SSW wind 9 to 13 kt. A chance of showers. 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.