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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:N wind around 8 kt. Showers likely and possibly a thunderstorm before 2pm, then rain and possibly a thunderstorm between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall.   Seas 1 ft or less.

      N 8kt
      < 1ft

    • Tonight

      Tonight:NNW wind around 8 kt. Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 11pm.   Seas 1 ft or less.

      NNW 8kt
      < 1ft

    • Wednesday

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

      NNW 9kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

      SW 8kt⇓
      < 1ft

    • Thursday

      Thursday:Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑S 9kt
      < 1ft

    • Thursday Night

      Thursday Night:S wind 9 to 12 kt. A chance of showers after 2am.   Seas 1 ft or less.

      S 12kt
      < 1ft

    • Friday

      Friday:S wind 7 to 9 kt. A chance of showers, with thunderstorms also possible after 2pm.   Seas 1 ft or less.

      S 9kt
      < 1ft

    • Friday Night

      Friday Night:S wind 5 to 8 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms, then showers likely after 2am.   Seas 1 ft or less.

      S 8kt⇓
      < 1ft

    • Saturday

      Saturday:Variable winds less than 5 kt becoming W around 6 kt in the afternoon. Showers likely, with thunderstorms also possible after 2pm.   Seas 1 ft or less.

      ⇑W 6kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 7:07 am EDT Jun 23, 2026
Forecast Valid: 1pm EDT Jun 23, 2026-6pm EDT Jun 29, 2026

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Detailed Forecast


This Afternoon
N wind around 8 kt. Showers likely and possibly a thunderstorm before 2pm, then rain and possibly a thunderstorm between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Tonight
NNW wind around 8 kt. Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 11pm. Seas 1 ft or less.
Wednesday
NNW wind 7 to 9 kt becoming W in the afternoon. Sunny. Seas 1 ft or less.
Wednesday Night
SW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.
Thursday
Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Thursday Night
S wind 9 to 12 kt. A chance of showers after 2am. Seas 1 ft or less.
Friday
S wind 7 to 9 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Friday Night
S wind 5 to 8 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms, then showers likely after 2am. Seas 1 ft or less.
Saturday
Variable winds less than 5 kt becoming W around 6 kt in the afternoon. Showers likely, with thunderstorms also possible after 2pm. 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 am EDT Jun 23, 2026
Forecast Valid: 1pm EDT Jun 23, 2026-6pm EDT Jun 29, 2026
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