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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:S wind 5 to 7 kt. Patchy fog after 3am. Seas 1 ft or less.

      S 7kt
      < 1ft

    • Wednesday

      Wednesday:SSE wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. A chance of showers, mainly after 2pm. Patchy fog before 9am. Seas 1 ft or less.

      ⇑SSE 13kt
      < 1ft

    • Wednesday Night

      Wednesday Night:S wind around 17 kt, with gusts as high as 23 kt. A chance of showers and thunderstorms before 8pm, then a chance of rain and thunderstorms between 8pm and 2am, then a chance of rain after 2am. Seas 1 ft or less.

      S 17kt
      < 1ft

    • Thursday

      Thursday:WNW wind 15 to 17 kt. Rain likely before 5pm, then a chance of rain and snow. Seas 1 ft or less.

      WNW 17kt
      < 1ft

    • Thursday Night

      Thursday Night:WNW wind 9 to 12 kt. A chance of rain and snow before 8pm. Seas 1 ft or less.

      WNW 12kt
      < 1ft

    • Friday

      Friday:WSW wind 8 to 11 kt becoming S 14 to 17 kt in the afternoon. Partly sunny. Seas 1 ft or less.

      ⇑S 17kt
      < 1ft

    • Friday Night

      Friday Night:S wind 17 to 19 kt becoming WSW after midnight. Winds could gust as high as 25 kt. Mostly cloudy, then gradually becoming mostly clear. Seas 1 ft or less.

      S 19kt
      < 1ft

    • Saturday

      Saturday:W wind 13 to 15 kt. Sunny. Seas 1 ft or less.

      W 15kt
      < 1ft

    • Saturday Night

      Saturday Night:WNW wind 7 to 9 kt becoming ENE after midnight. Mostly cloudy. Seas 1 ft or less.

      WNW 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 7:07 pm EDT Mar 10, 2026
Forecast Valid: 7pm EDT Mar 10, 2026-6pm EDT Mar 17, 2026

View Nearby Observations

Detailed Forecast


Tonight
S wind 5 to 7 kt. Patchy fog after 3am. Seas 1 ft or less.
Wednesday
SSE wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. A chance of showers, mainly after 2pm. Patchy fog before 9am. Seas 1 ft or less.
Wednesday Night
S wind around 17 kt, with gusts as high as 23 kt. A chance of showers and thunderstorms before 8pm, then a chance of rain and thunderstorms between 8pm and 2am, then a chance of rain after 2am. Seas 1 ft or less.
Thursday
WNW wind 15 to 17 kt. Rain likely before 5pm, then a chance of rain and snow. Seas 1 ft or less.
Thursday Night
WNW wind 9 to 12 kt. A chance of rain and snow before 8pm. Seas 1 ft or less.
Friday
WSW wind 8 to 11 kt becoming S 14 to 17 kt in the afternoon. Partly sunny. Seas 1 ft or less.
Friday Night
S wind 17 to 19 kt becoming WSW after midnight. Winds could gust as high as 25 kt. Mostly cloudy, then gradually becoming mostly clear. Seas 1 ft or less.
Saturday
W wind 13 to 15 kt. Sunny. Seas 1 ft or less.
Saturday Night
WNW wind 7 to 9 kt becoming ENE after midnight. Mostly cloudy. 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: 7:07 pm EDT Mar 10, 2026
Forecast Valid: 7pm EDT Mar 10, 2026-6pm EDT Mar 17, 2026
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