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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:S wind 7 to 12 kt becoming variable and less than 5 kt. A slight chance of showers and thunderstorms between 8pm and 11pm. Seas 1 ft or less.

      S 12kt⇓
      < 1ft

    • Saturday

      Saturday:NE wind 6 to 8 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

      NE 8kt
      < 1ft

    • Saturday Night

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

      SSE 6kt⇓
      < 1ft

    • Sunday

      Sunday:S wind 5 to 8 kt increasing to 11 to 14 kt in the afternoon. A chance of showers after 2pm. Seas 1 ft or less.

      ⇑S 14kt
      < 1ft

    • Sunday Night

      Sunday Night:S wind 16 to 20 kt, with gusts as high as 26 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Seas 1 ft or less.

      S 20kt
      < 1ft

    • Monday

      Monday:W wind 8 to 11 kt becoming NW in the morning. Partly sunny. Seas 1 ft or less.

      W 11kt
      < 1ft

    • Monday Night

      Monday Night:N wind around 6 kt. Partly cloudy. Seas 1 ft or less.

      N 6kt
      < 1ft

    • Tuesday

      Tuesday:Variable winds less than 5 kt becoming SSW 5 to 7 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 7kt
      < 1ft

    • Tuesday Night

      Tuesday Night:Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

      Light Wind
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:22 pm EDT Aug 14, 2026
Forecast Valid: 7pm EDT Aug 14, 2026-6pm EDT Aug 21, 2026

View Nearby Observations

Detailed Forecast


Tonight
S wind 7 to 12 kt becoming variable and less than 5 kt. A slight chance of showers and thunderstorms between 8pm and 11pm. Seas 1 ft or less.
Saturday
NE wind 6 to 8 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.
Saturday Night
SSE wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.
Sunday
S wind 5 to 8 kt increasing to 11 to 14 kt in the afternoon. A chance of showers after 2pm. Seas 1 ft or less.
Sunday Night
S wind 16 to 20 kt, with gusts as high as 26 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Seas 1 ft or less.
Monday
W wind 8 to 11 kt becoming NW in the morning. Partly sunny. Seas 1 ft or less.
Monday Night
N wind around 6 kt. Partly cloudy. Seas 1 ft or less.
Tuesday
Variable winds less than 5 kt becoming SSW 5 to 7 kt in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
Variable winds 5 kt or less. Mostly clear. 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: 2:22 pm EDT Aug 14, 2026
Forecast Valid: 7pm EDT Aug 14, 2026-6pm EDT Aug 21, 2026
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