For More Weather Information:

18NM WSW Islip NY

[NOTICE]

Last Update: 2:19 am EDT May 21, 2026
Forecast Valid: 4am EDT May 21, 2026-6pm EDT May 27, 2026

Thursday

N wind 14 to 16 km/h becoming NE in the afternoon. Showers, mainly before 2pm. Seas 1 m or less.

Thursday Night

ESE wind 8 to 10 km/h becoming ENE after midnight. Mostly cloudy. Seas 1 m or less.

Friday

ENE wind 21 to 24 km/h becoming E in the afternoon. Winds could gust as high as 35 km/h. Partly sunny. Seas 1 m or less.

Friday Night

E wind 16 to 18 km/h. A chance of showers after 2am. Seas 1 m or less.

Saturday

E wind 23 to 26 km/h increasing to 26 to 29 km/h in the afternoon. Winds could gust as high as 40 km/h. Showers, mainly after 8am. Seas 1 m or less.

Saturday Night

E wind 32 to 34 km/h, with gusts as high as 47 km/h. Showers. Seas 1 m or less.

Sunday

E wind 34 to 39 km/h decreasing to 27 to 32 km/h in the afternoon. Winds could gust as high as 50 km/h. Showers, mainly before 2pm. Seas 1 m or less.

Sunday Night

NNE wind 8 to 13 km/h. A chance of showers. Seas 1 m or less.

Memorial Day

NNE wind 5 to 10 km/h becoming S in the morning. A chance of showers. Seas 1 m 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.