For More Weather Information:

15NM SW Islip NY

[NOTICE]

Last Update: 2:21 pm EDT Jul 25, 2026
Forecast Valid: 12am EDT Jul 26, 2026-6pm EDT Aug 1, 2026

Overnight

Variable winds 5 kt or less. Mostly clear. Seas around 3 ft.

Sunday

NE wind 7 to 9 kt becoming SE in the afternoon. Sunny. Seas around 3 ft.

Sunday Night

SE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 2 to 3 ft.

Monday

Variable winds less than 5 kt becoming S 7 to 12 kt in the morning. Sunny. Seas around 2 ft.

Monday Night

SSW wind 12 to 14 kt, with gusts as high as 20 kt. A chance of showers. Seas around 3 ft.

Tuesday

S wind 12 to 15 kt increasing to 16 to 19 kt in the afternoon. Showers likely, then showers and possibly a thunderstorm after 2pm. Seas 3 to 4 ft.

Tuesday Night

SE wind 17 to 20 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers. Seas 4 to 5 ft.

Wednesday

ENE wind around 17 kt. A chance of showers. Seas around 4 ft.

Wednesday Night

NE wind 14 to 16 kt becoming N after midnight. A chance of showers. Seas around 4 ft.

Winds and seas may be higher in and near tstms.

*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.