For More Weather Information:

18NM WSW Islip NY

[NOTICE]

Last Update: 7:56 pm EDT Apr 30, 2026
Forecast Valid: 8pm EDT Apr 30, 2026-6pm EDT May 7, 2026

Tonight

W wind 6 to 9 kt becoming NW after midnight. Partly cloudy. Seas 1 ft or less.

Friday

NW wind around 9 kt becoming SW in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

SW wind 7 to 10 kt. A chance of showers, mainly after 2am. Seas 1 ft or less.

Saturday

WSW wind 5 to 7 kt becoming SSE in the afternoon. A chance of showers, mainly after 2pm. Seas 1 ft or less.

Saturday Night

SSE wind 6 to 8 kt becoming N after midnight. A chance of showers. Seas 1 ft or less.

Sunday

WNW wind 11 to 13 kt. Mostly sunny. Seas 1 ft or less.

Sunday Night

WNW wind 7 to 11 kt becoming W after midnight. Mostly clear. Seas 1 ft or less.

Monday

SSW wind 10 to 13 kt increasing to 13 to 16 kt in the afternoon. Sunny. Seas 1 ft or less.

Monday Night

SSW wind 14 to 17 kt. Partly cloudy. Seas 1 ft or less.

*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.