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18NM WSW Islip NY

[NOTICE]

Last Update: 2:30 am EDT Jul 31, 2026
Forecast Valid: 10am EDT Jul 31, 2026-6pm EDT Aug 6, 2026

Today

Variable winds less than 5 kt becoming SSW 5 to 7 kt in the afternoon. Sunny. Seas 1 ft or less.

Tonight

SSW wind 6 to 8 kt. Partly cloudy. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming S 5 to 10 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Saturday Night

S wind 9 to 12 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

S wind 9 to 13 kt. Partly sunny. Seas 1 ft or less.

Sunday Night

SSE wind 11 to 13 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2am. Seas 1 ft or less.

Monday

SSW wind around 13 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Monday Night

SW wind 6 to 8 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Tuesday

NW wind around 7 kt becoming S in the afternoon. Mostly 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.