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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

Today
SSW 12kt
2-3ft
Tonight
SSW 17kt⇓
2-3ft
Wednesday
SSE 10kt
2ft
Wednesday Night
SSE 9kt
2-3ft
Thursday
⇑S 24kt
6ft
Thursday Night
SW 23kt⇓
7ft
Juneteenth
WSW 16kt
4ft
Friday Night
W 15kt
3-4ft
Saturday
W 16kt
3ft

Associated Zone Forecast which includes this point

Last Update: 5:30 am EDT Jun 16, 2026
Forecast Valid: 7am EDT Jun 16, 2026-6pm EDT Jun 22, 2026

View Nearby Observations

Detailed Forecast

Today

NW wind 7 to 12 kt becoming SSW in the afternoon. Sunny. Seas 2 to 3 ft.

Tonight

SSW wind 12 to 17 kt decreasing to 7 to 12 kt after midnight. Partly cloudy. Seas 2 to 3 ft.

Wednesday

SSE wind 6 to 10 kt. A slight chance of showers after 11am. Seas around 2 ft.

Wednesday Night

SSE wind around 9 kt. Mostly cloudy. Seas 2 to 3 ft.

Thursday

S wind 17 to 20 kt increasing to 21 to 24 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Seas 4 ft building to 6 ft.

Thursday Night

SW wind 20 to 23 kt becoming W 15 to 18 kt after midnight. Winds could gust as high as 30 kt. A chance of showers before 8pm. Seas 7 ft subsiding to 5 ft.

Juneteenth

WSW wind 13 to 16 kt. Mostly sunny. Seas around 4 ft.

Friday Night

W wind 13 to 15 kt. Partly cloudy. Seas 3 to 4 ft.

Saturday

W wind around 16 kt. Sunny. Seas around 3 ft.

Winds and seas may be higher in and near tstms.

*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.