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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A chance of showers after 2am. Seas 1 ft or less.

      SSW 9kt⇓
      < 1ft

    • Saturday

      Saturday:Variable winds less than 5 kt becoming S 5 to 7 kt in the morning. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      ⇑S 7kt
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. A slight chance of showers before midnight. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming SE 5 to 7 kt in the afternoon. A chance of showers before 8am. Seas 1 ft or less.

      ⇑SE 7kt
      < 1ft

    • Sunday Night

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

      Light Wind
      < 1ft

    • Monday

      Monday:Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑SSE 8kt
      < 1ft

    • Monday Night

      Monday Night:S wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

      S 6kt⇓
      < 1ft

    • Tuesday

      Tuesday:S wind 5 to 8 kt increasing to 9 to 12 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑S 12kt
      < 1ft

    • Tuesday Night

      Tuesday Night:S wind 8 to 13 kt becoming SW after midnight. Mostly cloudy. Seas 1 ft or less.

      S 13kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:46 pm EDT Jun 26, 2026
Forecast Valid: 4pm EDT Jun 26, 2026-6pm EDT Jul 3, 2026

View Nearby Observations

Detailed Forecast


Tonight
SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A chance of showers after 2am. Seas 1 ft or less.
Saturday
Variable winds less than 5 kt becoming S 5 to 7 kt in the morning. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. A slight chance of showers before midnight. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming SE 5 to 7 kt in the afternoon. A chance of showers before 8am. Seas 1 ft or less.
Sunday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Monday Night
S wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.
Tuesday
S wind 5 to 8 kt increasing to 9 to 12 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Tuesday Night
S wind 8 to 13 kt becoming SW 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: 2:46 pm EDT Jun 26, 2026
Forecast Valid: 4pm EDT Jun 26, 2026-6pm EDT Jul 3, 2026
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