For More Weather Information:

18NM WSW Islip NY

[NOTICE]

Last Update: 2:28 pm EDT Sep 19, 2026
Forecast Valid: 3pm EDT Sep 19, 2026-6pm EDT Sep 26, 2026

This Afternoon

E wind around 10 kt. Partly sunny. Seas around 1 ft.

Tonight

ESE wind around 9 kt. Mostly cloudy. Seas around 1 ft.

Sunday

SE wind 10 to 14 kt becoming S in the afternoon. Winds could gust as high as 21 kt. Showers, mainly after 2pm. Seas around 1 ft.

Sunday Night

S wind 10 to 13 kt becoming N after midnight. Showers, mainly before 2am. Seas around 1 ft.

Monday

NE wind 11 to 14 kt. A chance of showers, mainly after 2pm. Seas around 1 ft.

Monday Night

ENE wind 10 to 13 kt. A chance of showers before 8pm, then a chance of showers after 2am. Seas around 1 ft.

Tuesday

ENE wind around 16 kt, with gusts as high as 22 kt. A chance of showers. Seas 1 to 2 ft.

Tuesday Night

ENE wind around 20 kt, with gusts as high as 28 kt. Mostly cloudy. Seas 1 to 2 ft.

Wednesday

ENE wind 21 to 24 kt, with gusts as high as 31 kt. Mostly cloudy. 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.