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

Hazardous Weather Conditions

For More Weather Information:

New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:S wind 6 to 11 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

      S 11kt⇓
      < 1ft

    • Tuesday

      Tuesday:SSW wind 6 to 9 kt increasing to 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 13kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SW wind 9 to 12 kt. Partly cloudy. Seas 1 ft or less.

      SW 12kt
      < 1ft

    • Wednesday

      Wednesday:WSW wind 8 to 12 kt. A chance of showers and thunderstorms between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. Seas 1 ft or less.

      WSW 12kt
      < 1ft

    • Wednesday Night

      Wednesday Night:WNW wind 7 to 11 kt becoming N after midnight. Showers and possibly a thunderstorm before 11pm, then a chance of showers between 11pm and 2am. Seas 1 ft or less.

      N 11kt
      < 1ft

    • Thursday

      Thursday:N wind 6 to 11 kt becoming variable and less than 5 kt in the afternoon. Partly sunny. Seas 1 ft or less.

      N 11kt⇓
      < 1ft

    • Thursday Night

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

      Light Wind
      < 1ft

    • Friday

      Friday:ENE wind around 8 kt becoming ESE in the afternoon. Partly sunny. Seas 1 ft or less.

      ENE 8kt
      < 1ft

    • Friday Night

      Friday Night:SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Showers likely. Seas 1 ft or less.

      SSE 6kt⇓
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 3:16 pm EDT May 18, 2026
Forecast Valid: 6pm EDT May 18, 2026-6pm EDT May 25, 2026

View Nearby Observations

Detailed Forecast


Tonight
S wind 6 to 11 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.
Tuesday
SSW wind 6 to 9 kt increasing to 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
SW wind 9 to 12 kt. Partly cloudy. Seas 1 ft or less.
Wednesday
WSW wind 8 to 12 kt. A chance of showers and thunderstorms between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. Seas 1 ft or less.
Wednesday Night
WNW wind 7 to 11 kt becoming N after midnight. Showers and possibly a thunderstorm before 11pm, then a chance of showers between 11pm and 2am. Seas 1 ft or less.
Thursday
N wind 6 to 11 kt becoming variable and less than 5 kt in the afternoon. Partly sunny. Seas 1 ft or less.
Thursday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Friday
ENE wind around 8 kt becoming ESE in the afternoon. Partly sunny. Seas 1 ft or less.
Friday Night
SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Showers likely. 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: 40.91°N 73.39°W
Last Update: 3:16 pm EDT May 18, 2026
Forecast Valid: 6pm EDT May 18, 2026-6pm EDT May 25, 2026
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