National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Overnight

      Overnight:SSW wind around 10 kt. Mostly cloudy. Seas around 1 ft.

      SSW 10kt
      1ft

    • Wednesday

      Wednesday:S wind 12 to 15 kt increasing to 18 to 21 kt in the afternoon. Winds could gust as high as 33 kt. Mostly cloudy. Seas 1 to 2 ft.

      ⇑S 21kt
      1-2ft

    • Wednesday Night

      Wednesday Night:S wind 14 to 17 kt decreasing to 10 to 13 kt after midnight. Winds could gust as high as 31 kt. Showers, mainly after 11pm. Patchy fog after 2am. Seas 1 to 2 ft.

      S 17kt⇓
      1-2ft

    • Thursday

      Thursday:SE wind around 6 kt becoming variable and less than 5 kt in the afternoon. Showers and possibly a thunderstorm. Patchy fog. Seas 1 ft or less.

      SE 6kt⇓
      < 1ft

    • Thursday Night

      Thursday Night:NW wind 7 to 10 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

      NW 10kt
      < 1ft

    • Friday

      Friday:NNW wind 8 to 11 kt. A chance of showers before 2pm. Seas around 1 ft.

      NNW 11kt
      1ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Saturday

      Saturday:SW wind 5 to 8 kt increasing to 8 to 11 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SW 11kt
      < 1ft

    • Saturday Night

      Saturday Night:SSW wind 7 to 10 kt becoming WSW after midnight. Mostly clear. Seas around 1 ft.

      SSW 10kt
      1ft


Associated Zone Forecast which includes this point

Last Update: 2:36 pm EDT May 12, 2026
Forecast Valid: 12am EDT May 13, 2026-6pm EDT May 19, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH

Overnight
SSW wind around 10 kt. Mostly cloudy. Seas around 1 ft.
Wednesday
S wind 12 to 15 kt increasing to 18 to 21 kt in the afternoon. Winds could gust as high as 33 kt. Mostly cloudy. Seas 1 to 2 ft.
Wednesday Night
S wind 14 to 17 kt decreasing to 10 to 13 kt after midnight. Winds could gust as high as 31 kt. Showers, mainly after 11pm. Patchy fog after 2am. Seas 1 to 2 ft.
Thursday
SE wind around 6 kt becoming variable and less than 5 kt in the afternoon. Showers and possibly a thunderstorm. Patchy fog. Seas 1 ft or less.
Thursday Night
NW wind 7 to 10 kt. A chance of showers and thunderstorms. Seas 1 ft or less.
Friday
NNW wind 8 to 11 kt. A chance of showers before 2pm. Seas around 1 ft.
Friday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Saturday
SW wind 5 to 8 kt increasing to 8 to 11 kt in the afternoon. Sunny. Seas 1 ft or less.
Saturday Night
SSW wind 7 to 10 kt becoming WSW after midnight. Mostly clear. Seas around 1 ft.

*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: 40.91°N 73.39°W
Last Update: 2:36 pm EDT May 12, 2026
Forecast Valid: 12am EDT May 13, 2026-6pm EDT May 19, 2026
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