For More Weather Information:

18NM WSW Islip NY

[NOTICE]

Last Update: 3:44 pm EDT Apr 20, 2026
Forecast Valid: 5pm EDT Apr 20, 2026-6pm EDT Apr 27, 2026

Late Afternoon

NNW wind around 14 kt. Isolated showers. Seas 1 ft or less.

Tonight

N wind 9 to 12 kt. Isolated showers before 8pm. Seas 1 ft or less.

Tuesday

N wind 5 to 7 kt becoming variable and less than 5 kt. Sunny. Seas 1 ft or less.

Tuesday Night

S wind 12 to 14 kt. A slight chance of showers after 2am. Seas 1 ft or less.

Wednesday

S wind 9 to 13 kt. A chance of showers, mainly before noon. Seas 1 ft or less.

Wednesday Night

ENE wind 5 to 8 kt. Partly cloudy. Seas 1 ft or less.

Thursday

NNW wind 5 to 7 kt becoming W in the afternoon. Mostly sunny. Seas 1 ft or less.

Thursday Night

NW wind around 7 kt becoming N after midnight. Mostly cloudy. Seas 1 ft or less.

Friday

NNE wind 5 to 7 kt becoming SSW in the afternoon. Mostly sunny. 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.