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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Today
SSW 10kt
< 1ft
Tonight
SSW 8kt
< 1ft
Saturday
SSW 11kt
< 1ft
Saturday Night
WSW 10kt
< 1ft
Sunday
W 11kt
< 1ft
Sunday Night
W 8kt
< 1ft
Monday
⇑S 11kt
< 1ft
Monday Night
SW 9kt
< 1ft
Tuesday
WSW 12kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:51 am EDT Aug 7, 2026
Forecast Valid: 10am EDT Aug 7, 2026-6pm EDT Aug 13, 2026

View Nearby Observations

Detailed Forecast

Today

WSW wind 6 to 10 kt becoming SSW in the afternoon. A slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Tonight

SSW wind 6 to 8 kt becoming WSW in the evening. A chance of showers and thunderstorms. Seas 1 ft or less.

Saturday

WSW wind 7 to 11 kt becoming SSW in the afternoon. A slight chance of thunderstorms after 5pm. Seas 1 ft or less.

Saturday Night

WSW wind around 10 kt. A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Seas 1 ft or less.

Sunday

W wind 8 to 11 kt. Sunny. Seas 1 ft or less.

Sunday Night

W wind 5 to 8 kt becoming NW after midnight. Mostly clear. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Sunny. Seas 1 ft or less.

Monday Night

SW wind 7 to 9 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

Tuesday

WSW wind 7 to 12 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.