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18NM WSW Islip NY

[NOTICE]

Last Update: 9:59 am EDT Aug 6, 2026
Forecast Valid: 10am EDT Aug 6, 2026-6pm EDT Aug 12, 2026

Today

SSW wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Tonight

SSW wind 12 to 15 kt decreasing to 8 to 11 kt after midnight. Winds could gust as high as 21 kt. Partly cloudy. Seas 1 ft or less.

Friday

WSW wind 6 to 11 kt becoming SSW in the afternoon. A chance of showers and thunderstorms after 4pm. Seas 1 ft or less.

Friday Night

SW wind 8 to 10 kt. A chance of showers and thunderstorms, mainly between 8pm and 2am. Seas 1 ft or less.

Saturday

SSW wind 8 to 11 kt. A slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Saturday Night

WSW wind 8 to 10 kt. Partly cloudy. Seas 1 ft or less.

Sunday

SW wind 7 to 10 kt. Sunny. Seas 1 ft or less.

Sunday Night

WSW wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming SSW 6 to 11 kt in the morning. Sunny. 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.