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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:SSW wind 7 to 10 kt. Mostly cloudy. Seas 1 ft or less.

      SSW 10kt
      < 1ft

    • Tonight

      Tonight:SW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. A slight chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Seas 1 ft or less.

      SW 7kt⇓
      < 1ft

    • Saturday

      Saturday:Variable winds less than 5 kt becoming SSE 5 to 7 kt in the afternoon. Showers likely, mainly between 8am and 11am. Seas 1 ft or less.

      ⇑SSE 7kt
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming SSE 5 to 7 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑SSE 7kt
      < 1ft

    • Sunday Night

      Sunday Night:S wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.

      S 6kt⇓
      < 1ft

    • Monday

      Monday:Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑S 9kt
      < 1ft

    • Monday Night

      Monday Night:SSW wind 5 to 9 kt. Partly cloudy. Seas 1 ft or less.

      SSW 9kt
      < 1ft

    • Tuesday

      Tuesday:S wind 5 to 8 kt increasing to 10 to 13 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑S 13kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 8:09 am EDT Jun 26, 2026
Forecast Valid: 11am EDT Jun 26, 2026-6pm EDT Jul 2, 2026

View Nearby Observations

Detailed Forecast


Today
SSW wind 7 to 10 kt. Mostly cloudy. Seas 1 ft or less.
Tonight
SW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. A slight chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Seas 1 ft or less.
Saturday
Variable winds less than 5 kt becoming SSE 5 to 7 kt in the afternoon. Showers likely, mainly between 8am and 11am. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming SSE 5 to 7 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Sunday Night
S wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.
Monday Night
SSW wind 5 to 9 kt. Partly cloudy. Seas 1 ft or less.
Tuesday
S wind 5 to 8 kt increasing to 10 to 13 kt in the afternoon. Mostly sunny. 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: 8:09 am EDT Jun 26, 2026
Forecast Valid: 11am EDT Jun 26, 2026-6pm EDT Jul 2, 2026
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