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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
SSW 16kt
< 1ft
Tuesday
⇑S 19kt
< 1ft
Tuesday Night
SSW 23kt
< 1ft
Wednesday
S 18kt
< 1ft
Wednesday Night
S 17kt⇓
< 1ft
Thursday
NW 9kt
< 1ft
Thursday Night
NW 8kt
< 1ft
Friday
W 11kt
< 1ft
Friday Night
SW 8kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:20 pm EDT May 4, 2026
Forecast Valid: 7pm EDT May 4, 2026-6pm EDT May 11, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING...

Tonight

SSW wind 14 to 16 kt. Mostly clear. Seas 1 ft or less.

Tuesday

S wind 12 to 15 kt increasing to 16 to 19 kt in the afternoon. Winds could gust as high as 26 kt. Sunny. Seas 1 ft or less.

Tuesday Night

SSW wind 19 to 23 kt, with gusts as high as 31 kt. Increasing clouds. Seas 1 ft or less.

Wednesday

S wind 16 to 18 kt, with gusts as high as 24 kt. Showers, mainly after 2pm. Seas 1 ft or less.

Wednesday Night

S wind 14 to 17 kt becoming WSW 10 to 13 kt after midnight. Showers and possibly a thunderstorm before 2am, then a chance of showers. Seas 1 ft or less.

Thursday

NW wind around 9 kt. Showers likely, mainly after 8am. Seas 1 ft or less.

Thursday Night

W wind around 8 kt becoming NW in the evening. A chance of showers before 2am. Seas 1 ft or less.

Friday

WNW wind 8 to 11 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

SW wind 6 to 8 kt. Partly cloudy. 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.