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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Thursday

      Thursday:S wind 9 to 12 kt increasing to 13 to 16 kt in the afternoon. A slight chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Seas 1 ft or less.

      ⇑S 16kt
      < 1ft

    • Thursday Night

      Thursday Night:S wind 9 to 14 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.

      S 14kt⇓
      < 1ft

    • Friday

      Friday:Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. A slight chance of showers before 8am. Seas 1 ft or less.

      ⇑SW 7kt
      < 1ft

    • Friday Night

      Friday Night:SW wind 5 to 9 kt becoming N after midnight. Partly cloudy. Seas 1 ft or less.

      N 9kt
      < 1ft

    • Saturday

      Saturday:N wind 5 to 9 kt becoming E in the afternoon. 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 S 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑S 9kt
      < 1ft

    • Sunday Night

      Sunday Night:SSW wind 8 to 11 kt becoming WSW after midnight. Partly cloudy. Seas 1 ft or less.

      SSW 11kt
      < 1ft

    • Monday

      Monday:W wind around 8 kt. Mostly sunny. Seas 1 ft or less.

      W 8kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:53 pm EDT Aug 26, 2026
Forecast Valid: 2am EDT Aug 27, 2026-6pm EDT Sep 2, 2026

View Nearby Observations

Detailed Forecast


Thursday
S wind 9 to 12 kt increasing to 13 to 16 kt in the afternoon. A slight chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Seas 1 ft or less.
Thursday Night
S wind 9 to 14 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.
Friday
Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. A slight chance of showers before 8am. Seas 1 ft or less.
Friday Night
SW wind 5 to 9 kt becoming N after midnight. Partly cloudy. Seas 1 ft or less.
Saturday
N wind 5 to 9 kt becoming E in the afternoon. 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 S 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.
Sunday Night
SSW wind 8 to 11 kt becoming WSW after midnight. Partly cloudy. Seas 1 ft or less.
Monday
W wind around 8 kt. Mostly sunny. 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: 2:53 pm EDT Aug 26, 2026
Forecast Valid: 2am EDT Aug 27, 2026-6pm EDT Sep 2, 2026
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