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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Today
⇑S 11kt
< 1ft
Tonight
SSW 12kt⇓
< 1ft
Tuesday
⇑ESE 6kt
< 1ft
Tuesday Night
WSW 9kt
< 1ft
Wednesday
WNW 13kt
< 1ft
Wednesday Night
WNW 11kt
< 1ft
Thursday
W 6kt
< 1ft
Thursday Night
S 9kt
< 1ft
Friday
S 12kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 1:36 am EST Jan 5, 2026
Forecast Valid: 9am EST Jan 5, 2026-6pm EST Jan 11, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming S 6 to 11 kt in the afternoon. A slight chance of snow after 10am, mixing with rain after 4pm. Seas 1 ft or less.

Tonight

SSW wind 9 to 12 kt becoming WSW 5 to 8 kt after midnight. Winds could gust as high as 20 kt. A slight chance of rain before 7pm. Seas 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming ESE around 6 kt in the afternoon. Mostly cloudy. Seas 1 ft or less.

Tuesday Night

SE wind 7 to 9 kt becoming WSW after midnight. A chance of rain, mainly before 1am. Seas 1 ft or less.

Wednesday

WNW wind around 13 kt. Mostly sunny. Seas 1 ft or less.

Wednesday Night

WNW wind 7 to 11 kt. Mostly clear. Seas 1 ft or less.

Thursday

WNW wind around 6 kt becoming SW in the afternoon. Mostly sunny. Seas 1 ft or less.

Thursday Night

S wind 6 to 9 kt. Mostly cloudy. Seas 1 ft or less.

Friday

S wind 10 to 12 kt. A chance of rain. 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.