For More Weather Information:

15NM SW Islip NY

[NOTICE]

Last Update: 11:51 am EDT May 21, 2026
Forecast Valid: 1pm EDT May 21, 2026-6pm EDT May 27, 2026

This Afternoon

ENE wind around 11 kt. Rain, mainly before 5pm. Seas around 3 ft.

Tonight

ESE wind 5 to 7 kt becoming ENE after midnight. A chance of rain before 8pm. Seas around 2 ft.

Friday

E wind 14 to 16 kt. Partly sunny. Seas around 3 ft.

Friday Night

E wind 10 to 12 kt. A slight chance of showers after 2am. Seas around 3 ft.

Saturday

E wind 15 to 19 kt, with gusts as high as 26 kt. Showers, mainly after 8am. Seas 4 to 5 ft.

Saturday Night

E wind 20 to 22 kt, with gusts as high as 28 kt. Showers. Seas around 6 ft.

Sunday

E wind 22 to 25 kt decreasing to 18 to 21 kt in the afternoon. Showers, mainly before 2pm. Seas 6 to 7 ft.

Sunday Night

ENE wind 6 to 10 kt becoming N after midnight. A chance of showers. Seas around 6 ft.

Memorial Day

Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. A chance of showers. Seas around 5 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.