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Hazardous Weather Conditions

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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:NNE wind around 6 kt becoming variable and less than 5 kt. Mostly sunny. Seas 1 ft or less.

      NNE 6kt⇓
      < 1ft

    • Tonight

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

      Light Wind
      < 1ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. A slight chance of showers between noon and 5pm. Seas 1 ft or less.

      ⇑SSE 8kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SSE wind around 9 kt becoming SSW after midnight. A slight chance of showers after 8pm. Seas 1 ft or less.

      SSE 9kt
      < 1ft

    • Thursday

      Thursday:SSW wind 6 to 9 kt increasing to 10 to 13 kt in the afternoon. A slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      ⇑SSW 13kt
      < 1ft

    • Thursday Night

      Thursday Night:SW wind 12 to 15 kt decreasing to 8 to 11 kt after midnight. Winds could gust as high as 21 kt. A chance of showers and thunderstorms between 8pm and midnight. Seas 1 ft or less.

      SW 15kt⇓
      < 1ft

    • Friday

      Friday:WSW wind 7 to 11 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.

      SSW 11kt
      < 1ft

    • Friday Night

      Friday Night:WSW wind around 7 kt. A chance of showers. Seas 1 ft or less.

      WSW 7kt
      < 1ft

    • Saturday

      Saturday:WSW wind 6 to 9 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.

      SSW 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:53 am EDT Aug 4, 2026
Forecast Valid: 5am EDT Aug 4, 2026-6pm EDT Aug 10, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS

Today
NNE wind around 6 kt becoming variable and less than 5 kt. Mostly sunny. Seas 1 ft or less.
Tonight
Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.
Wednesday
Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. A slight chance of showers between noon and 5pm. Seas 1 ft or less.
Wednesday Night
SSE wind around 9 kt becoming SSW after midnight. A slight chance of showers after 8pm. Seas 1 ft or less.
Thursday
SSW wind 6 to 9 kt increasing to 10 to 13 kt in the afternoon. A slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Thursday Night
SW wind 12 to 15 kt decreasing to 8 to 11 kt after midnight. Winds could gust as high as 21 kt. A chance of showers and thunderstorms between 8pm and midnight. Seas 1 ft or less.
Friday
WSW wind 7 to 11 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.
Friday Night
WSW wind around 7 kt. A chance of showers. Seas 1 ft or less.
Saturday
WSW wind 6 to 9 kt becoming SSW 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: 2:53 am EDT Aug 4, 2026
Forecast Valid: 5am EDT Aug 4, 2026-6pm EDT Aug 10, 2026
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