For More Weather Information:

15NM SW Islip NY

[NOTICE]

Last Update: 10:15 am EDT Apr 19, 2026
Forecast Valid: 12pm EDT Apr 19, 2026-6pm EDT Apr 25, 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON EDT TODAY...

This Afternoon

NW wind 13 to 16 kt increasing to 18 to 21 kt. Winds could gust as high as 28 kt. Showers. Seas 2 to 3 ft.

Tonight

WNW wind 8 to 12 kt. Mostly clear. Seas 2 to 3 ft.

Monday

WNW wind around 11 kt. A chance of showers. Seas around 2 ft.

Monday Night

NNW wind around 16 kt. Partly cloudy. Seas around 2 ft.

Tuesday

N wind 9 to 12 kt becoming NW 6 to 9 kt in the afternoon. Sunny. Seas 1 to 2 ft.

Tuesday Night

S wind 16 to 18 kt. A chance of showers after 2am. Seas 2 ft building to 4 ft.

Wednesday

S wind 11 to 15 kt. A chance of showers before 8am. Seas 3 to 4 ft.

Wednesday Night

S wind around 9 kt becoming E after midnight. Partly cloudy. Seas 2 to 3 ft.

Thursday

NNW wind 6 to 9 kt becoming SW 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.