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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

This Afternoon
SE 14kt
2ft

Small Craft Advisory
Tonight
S 17kt
4ft

Small Craft Advisory
Tuesday
NW 9kt
3ft
Tuesday Night
NNW 10kt
3ft
Wednesday
WSW 10kt
2-3ft
Wednesday Night
SW 11kt⇓
2-3ft
Thursday
⇑S 13kt
2ft
Thursday Night
S 16kt
2-3ft
Friday
S 13kt
2ft

Associated Zone Forecast which includes this point

Last Update: 7:08 am EDT Jun 22, 2026
Forecast Valid: 2pm EDT Jun 22, 2026-6pm EDT Jun 28, 2026

View Nearby Observations

Detailed Forecast

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

This Afternoon

SE wind 12 to 14 kt, with gusts as high as 21 kt. A chance of showers and thunderstorms. Seas around 2 ft.

Tonight

S wind 13 to 17 kt, with gusts as high as 24 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Seas around 4 ft.

Tuesday

SW wind around 9 kt becoming NNW in the afternoon. Showers likely and possibly a thunderstorm before 2pm, then a chance of showers. Seas around 3 ft.

Tuesday Night

NNW wind 7 to 10 kt. A slight chance of showers before 8pm. Seas around 3 ft.

Wednesday

NW wind 7 to 10 kt becoming WSW in the afternoon. Sunny. Seas 2 to 3 ft.

Wednesday Night

SW wind 6 to 11 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 2 to 3 ft.

Thursday

Variable winds less than 5 kt becoming S 8 to 13 kt in the afternoon. Mostly sunny. Seas around 2 ft.

Thursday Night

S wind 13 to 16 kt. A chance of showers, with thunderstorms also possible after 2am. Seas 2 to 3 ft.

Friday

S wind 11 to 13 kt. A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. 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.