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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Friday

      Friday:Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. A slight chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      ⇑SW 7kt
      < 1ft

    • Friday Night

      Friday Night:Variable winds less than 5 kt becoming N 5 to 10 kt after midnight. A chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

      ⇑N 10kt
      < 1ft

    • Saturday

      Saturday:N wind 5 to 9 kt becoming variable and less than 5 kt. Mostly sunny. Seas 1 ft or less.

      N 9kt⇓
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming SSW 6 to 11 kt in the morning. Mostly sunny. Seas 1 ft or less.

      ⇑SSW 11kt
      < 1ft

    • Sunday Night

      Sunday Night:SSW wind 9 to 14 kt becoming WSW after midnight. Mostly cloudy. Seas 1 ft or less.

      SSW 14kt
      < 1ft

    • Monday

      Monday:WNW wind 5 to 7 kt becoming SW in the afternoon. Partly sunny. Seas 1 ft or less.

      WSW 7kt
      < 1ft

    • Monday Night

      Monday Night:Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tuesday

      Tuesday:Variable winds less than 5 kt becoming S 5 to 10 kt in the morning. A chance of showers. Seas 1 ft or less.

      ⇑S 10kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:21 am EDT Aug 28, 2026
Forecast Valid: 2am EDT Aug 28, 2026-6pm EDT Sep 3, 2026

View Nearby Observations

Detailed Forecast


Friday
Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. A slight chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Friday Night
Variable winds less than 5 kt becoming N 5 to 10 kt after midnight. A chance of showers and thunderstorms before 8pm. Seas 1 ft or less.
Saturday
N wind 5 to 9 kt becoming variable and less than 5 kt. Mostly sunny. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming SSW 6 to 11 kt in the morning. Mostly sunny. Seas 1 ft or less.
Sunday Night
SSW wind 9 to 14 kt becoming WSW after midnight. Mostly cloudy. Seas 1 ft or less.
Monday
WNW wind 5 to 7 kt becoming SW in the afternoon. Partly sunny. Seas 1 ft or less.
Monday Night
Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.
Tuesday
Variable winds less than 5 kt becoming S 5 to 10 kt in the morning. A chance of showers. Seas 1 ft or less.

Winds and seas may be higher in and near tstms.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 40.62°N 73.59°W
Last Update: 2:21 am EDT Aug 28, 2026
Forecast Valid: 2am EDT Aug 28, 2026-6pm EDT Sep 3, 2026
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