For More Weather Information:

18NM WSW Islip NY

[NOTICE]

Last Update: 3:19 pm EDT Sep 16, 2026
Forecast Valid: 3pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026

This Afternoon

SSW wind around 10 kt. Mostly sunny. Seas 1 ft or less.

Tonight

SSW wind 8 to 11 kt becoming WSW 5 to 8 kt after midnight. Partly cloudy. Seas 1 ft or less.

Thursday

S wind 5 to 8 kt increasing to 8 to 11 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Thursday Night

SSW wind 11 to 15 kt becoming WSW after midnight. A chance of showers, mainly before 2am. Seas 1 ft or less.

Friday

N wind 9 to 11 kt. Partly sunny through mid morning, then becoming sunny. Seas 1 ft or less.

Friday Night

NNE wind around 12 kt. Partly cloudy. Seas 1 ft or less.

Saturday

NE wind 9 to 11 kt becoming ESE in the afternoon. Mostly sunny. Seas 1 ft or less.

Saturday Night

SE wind around 9 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

S wind 12 to 14 kt, with gusts as high as 20 kt. Showers likely. 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.