For More Weather Information:

4NM SW Islip NY

[NOTICE]

Last Update: 11:03 am EDT Sep 18, 2026
Forecast Valid: 2pm EDT Sep 18, 2026-6pm EDT Sep 24, 2026

This Afternoon

N wind around 7 kt. Sunny. Seas 1 ft or less.

Tonight

NNE wind 6 to 11 kt. Partly cloudy. Seas 1 ft or less.

Saturday

NE wind 7 to 10 kt becoming E in the afternoon. Mostly sunny. Seas 1 ft or less.

Saturday Night

ESE wind around 6 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

SSE wind 7 to 11 kt. Showers likely, mainly after 2pm. Seas 1 ft or less.

Sunday Night

S wind around 9 kt becoming NW after midnight. Showers. Seas 1 ft or less.

Monday

NE wind 12 to 14 kt, with gusts as high as 22 kt. Showers likely, mainly before 8am. Seas 1 ft or less.

Monday Night

ENE wind 11 to 15 kt, with gusts as high as 21 kt. A chance of showers. Seas 1 ft or less.

Tuesday

ENE wind around 20 kt, with gusts as high as 30 kt. A chance of showers. 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.