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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:S wind 7 to 9 kt becoming SW after midnight. Clear. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Tuesday

      Tuesday:WSW wind 7 to 10 kt becoming S 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑S 13kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SSW wind 11 to 16 kt. Increasing clouds. Seas 1 ft or less.

      SSW 16kt
      < 1ft

    • Wednesday

      Wednesday:S wind 9 to 12 kt increasing to 12 to 15 kt in the afternoon. Showers likely, with thunderstorms also possible after 5pm. Seas 1 ft or less.

      ⇑S 15kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SW wind 12 to 15 kt decreasing to 8 to 11 kt after midnight. Showers and thunderstorms likely before 11pm, then a chance of showers. Seas 1 ft or less.

      SW 15kt⇓
      < 1ft

    • Thursday

      Thursday:WSW wind 8 to 10 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      WSW 10kt
      < 1ft

    • Thursday Night

      Thursday Night:W wind 5 to 7 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.

      W 7kt⇓
      < 1ft

    • Friday

      Friday:Variable winds less than 5 kt becoming SSE 5 to 9 kt in the morning. A chance of showers. Seas 1 ft or less.

      ⇑SSE 9kt
      < 1ft

    • Friday Night

      Friday Night:S wind around 6 kt. A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Seas 1 ft or less.

      S 6kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:07 pm EDT Jun 8, 2026
Forecast Valid: 10pm EDT Jun 8, 2026-6pm EDT Jun 15, 2026

View Nearby Observations

Detailed Forecast


Tonight
S wind 7 to 9 kt becoming SW after midnight. Clear. Seas 1 ft or less.
Tuesday
WSW wind 7 to 10 kt becoming S 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
SSW wind 11 to 16 kt. Increasing clouds. Seas 1 ft or less.
Wednesday
S wind 9 to 12 kt increasing to 12 to 15 kt in the afternoon. Showers likely, with thunderstorms also possible after 5pm. Seas 1 ft or less.
Wednesday Night
SW wind 12 to 15 kt decreasing to 8 to 11 kt after midnight. Showers and thunderstorms likely before 11pm, then a chance of showers. Seas 1 ft or less.
Thursday
WSW wind 8 to 10 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Thursday Night
W wind 5 to 7 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.
Friday
Variable winds less than 5 kt becoming SSE 5 to 9 kt in the morning. A chance of showers. Seas 1 ft or less.
Friday Night
S wind around 6 kt. A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. 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: 2:07 pm EDT Jun 8, 2026
Forecast Valid: 10pm EDT Jun 8, 2026-6pm EDT Jun 15, 2026
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