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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Today
NNE 16kt
3ft

Small Craft Advisory
Tonight
NNE 14kt
3ft
Wednesday
NNE 11kt
3ft
Wednesday Night
SW 10kt
3ft
Thursday
⇑SSW 14kt
3ft
Thursday Night
SSW 16kt⇓
3-4ft
Friday
SW 11kt
2ft
Friday Night
W 10kt
2ft
Saturday
N 8kt
2ft

Associated Zone Forecast which includes this point

Last Update: 3:22 am EDT Jul 7, 2026
Forecast Valid: 5am EDT Jul 7, 2026-6pm EDT Jul 13, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

Today

NNE wind 14 to 16 kt. A chance of showers, mainly before 11am. Seas around 3 ft.

Tonight

NNE wind 12 to 14 kt. Mostly cloudy. Seas around 3 ft.

Wednesday

NNE wind 6 to 11 kt becoming S in the afternoon. Sunny. Seas around 3 ft.

Wednesday Night

SW wind 8 to 10 kt. Partly cloudy. Seas around 3 ft.

Thursday

SSW wind 8 to 11 kt increasing to 11 to 14 kt in the afternoon. Partly sunny. Seas around 3 ft.

Thursday Night

SSW wind 13 to 16 kt becoming WSW 10 to 13 kt after midnight. Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Seas 3 to 4 ft.

Friday

SW wind 8 to 11 kt. Mostly sunny. Seas around 2 ft.

Friday Night

W wind 8 to 10 kt becoming NW after midnight. A chance of showers. Seas around 2 ft.

Saturday

N wind around 8 kt becoming ESE in the afternoon. Mostly sunny. Seas around 2 ft.

*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.