Hazardous Weather Conditions

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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • Friday

      Friday:W wind 6 to 10 kt. A chance of showers and thunderstorms after 5pm.   Seas 1 ft or less.

      W 10kt
      < 1ft

    • Friday Night

      Friday Night:WSW wind 8 to 10 kt becoming NW after midnight. A chance of showers and thunderstorms before 11pm.   Seas 1 ft or less.

      NW 10kt
      < 1ft

    • Saturday

      Saturday:NW wind around 8 kt becoming W in the afternoon. Sunny. Seas 1 ft or less.

      NW 8kt
      < 1ft

    • Saturday Night

      Saturday Night:WSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.

      WSW 7kt⇓
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming S 13 to 18 kt in the morning. A chance of showers after 2pm.   Seas 1 ft or less.

      ⇑S 18kt
      < 1ft

    • Sunday Night

      Sunday Night:S wind 10 to 15 kt becoming WSW after midnight. Winds could gust as high as 22 kt. Showers, mainly between 8pm and 2am.   Seas 1 ft or less.

      S 15kt
      < 1ft

    • Monday

      Monday:NW wind around 8 kt becoming WSW in the afternoon. A chance of showers before 8am.   Seas 1 ft or less.

      NW 8kt
      < 1ft

    • Monday Night

      Monday Night:WSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.

      WSW 7kt⇓
      < 1ft

    • Tuesday

      Tuesday:Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑S 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 8:50 pm EDT Jun 11, 2026
Forecast Valid: 1am EDT Jun 12, 2026-6pm EDT Jun 18, 2026

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Detailed Forecast

...SEVERE THUNDERSTORM WATCH 317 IN EFFECT UNTIL MIDNIGHT EDT

Friday
W wind 6 to 10 kt. A chance of showers and thunderstorms after 5pm. Seas 1 ft or less.
Friday Night
WSW wind 8 to 10 kt becoming NW after midnight. A chance of showers and thunderstorms before 11pm. Seas 1 ft or less.
Saturday
NW wind around 8 kt becoming W in the afternoon. Sunny. Seas 1 ft or less.
Saturday Night
WSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming S 13 to 18 kt in the morning. A chance of showers after 2pm. Seas 1 ft or less.
Sunday Night
S wind 10 to 15 kt becoming WSW after midnight. Winds could gust as high as 22 kt. Showers, mainly between 8pm and 2am. Seas 1 ft or less.
Monday
NW wind around 8 kt becoming WSW in the afternoon. A chance of showers before 8am. Seas 1 ft or less.
Monday Night
WSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.
Tuesday
Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

*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: 8:50 pm EDT Jun 11, 2026
Forecast Valid: 1am EDT Jun 12, 2026-6pm EDT Jun 18, 2026
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