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18NM WSW Islip NY

[NOTICE]

Last Update: 8:06 pm EDT Aug 11, 2026
Forecast Valid: 11pm EDT Aug 11, 2026-6pm EDT Aug 18, 2026

Overnight

W wind around 6 kt becoming NNW after midnight. A slight chance of showers and thunderstorms. Seas 1 ft or less.

Wednesday

NNE wind 7 to 9 kt becoming SW in the afternoon. Mostly sunny. Seas 1 ft or less.

Wednesday Night

SSW wind 7 to 9 kt becoming W after midnight. A slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Thursday

W wind 6 to 11 kt becoming SW in the afternoon. A slight chance of showers and thunderstorms before 8am. Seas 1 ft or less.

Thursday Night

SW wind 7 to 9 kt becoming W after midnight. A slight chance of showers and thunderstorms. Seas 1 ft or less.

Friday

NNW wind 7 to 9 kt. Mostly sunny. Seas 1 ft or less.

Friday Night

N wind around 9 kt. Mostly clear. Seas 1 ft or less.

Saturday

N wind 5 to 8 kt becoming WNW in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

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.