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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:Variable winds less than 5 kt becoming SSE 5 to 7 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑SSE 7kt
      < 1ft

    • Tonight

      Tonight:S wind around 8 kt. A slight chance of showers after 2am. Seas 1 ft or less.

      S 8kt
      < 1ft

    • Thursday

      Thursday:S wind 6 to 9 kt increasing to 9 to 12 kt in the afternoon. A slight chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      ⇑S 12kt
      < 1ft

    • Thursday Night

      Thursday Night:SW wind 11 to 14 kt decreasing to 7 to 10 kt after midnight. A chance of showers and thunderstorms between 8pm and midnight. Seas 1 ft or less.

      SW 14kt⇓
      < 1ft

    • Friday

      Friday:WSW wind 6 to 11 kt becoming SSW in the afternoon. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      SSW 11kt
      < 1ft

    • Friday Night

      Friday Night:WSW wind around 8 kt. A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and midnight. Seas 1 ft or less.

      WSW 8kt
      < 1ft

    • Saturday

      Saturday:WSW wind 8 to 11 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.

      SSW 11kt
      < 1ft

    • Saturday Night

      Saturday Night:WSW wind 7 to 9 kt. Partly cloudy. Seas 1 ft or less.

      WSW 9kt
      < 1ft

    • Sunday

      Sunday:W wind 7 to 9 kt becoming SW in the afternoon. Sunny. Seas 1 ft or less.

      WSW 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 5:07 am EDT Aug 5, 2026
Forecast Valid: 8am EDT Aug 5, 2026-6pm EDT Aug 11, 2026

View Nearby Observations

Detailed Forecast


Today
Variable winds less than 5 kt becoming SSE 5 to 7 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Tonight
S wind around 8 kt. A slight chance of showers after 2am. Seas 1 ft or less.
Thursday
S wind 6 to 9 kt increasing to 9 to 12 kt in the afternoon. A slight chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Thursday Night
SW wind 11 to 14 kt decreasing to 7 to 10 kt after midnight. A chance of showers and thunderstorms between 8pm and midnight. Seas 1 ft or less.
Friday
WSW wind 6 to 11 kt becoming SSW in the afternoon. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Friday Night
WSW wind around 8 kt. A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and midnight. Seas 1 ft or less.
Saturday
WSW wind 8 to 11 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.
Saturday Night
WSW wind 7 to 9 kt. Partly cloudy. Seas 1 ft or less.
Sunday
W wind 7 to 9 kt becoming SW in the afternoon. 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: 5:07 am EDT Aug 5, 2026
Forecast Valid: 8am EDT Aug 5, 2026-6pm EDT Aug 11, 2026
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