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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Overnight
Light Wind
2ft
Monday
⇑SSE 14kt
2ft

Small Craft Advisory
Monday Night
S 19kt
4-5ft

Small Craft Advisory
Tuesday
W 9kt
3ft
Tuesday Night
NW 9kt
3ft
Wednesday
SW 8kt
2-3ft
Wednesday Night
SSW 11kt⇓
2-3ft
Thursday
⇑S 11kt
2ft
Thursday Night
S 13kt
2-3ft

Associated Zone Forecast which includes this point

Last Update: 11:53 pm EDT Jun 21, 2026
Forecast Valid: 12am EDT Jun 22, 2026-6pm EDT Jun 28, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY AFTERNOON THROUGH

Overnight

Variable winds 5 kt or less. Partly cloudy. Seas around 2 ft.

Monday

ESE wind 6 to 9 kt becoming SSE 11 to 14 kt in the afternoon. A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Seas around 2 ft.

Monday Night

S wind 16 to 19 kt, with gusts as high as 29 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm. Seas 4 to 5 ft.

Tuesday

W wind around 9 kt becoming NNW in the afternoon. A chance of showers, mainly before 2pm. Seas around 3 ft.

Tuesday Night

NW wind 7 to 9 kt. A slight chance of showers before 8pm. Seas around 3 ft.

Wednesday

NNW wind 5 to 8 kt becoming SW in the afternoon. Sunny. Seas 2 to 3 ft.

Wednesday Night

SSW wind 8 to 11 kt becoming WSW 5 to 8 kt after midnight. Mostly clear. Seas 2 to 3 ft.

Thursday

Variable winds less than 5 kt becoming S 6 to 11 kt in the afternoon. Mostly sunny. Seas around 2 ft.

Thursday Night

S wind 9 to 13 kt. A chance of showers. Seas 2 to 3 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.