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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Friday

      Friday:W wind 6 to 8 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      W 8kt
      < 1ft

    • Friday Night

      Friday Night:WNW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Patchy fog after 2am. Seas 1 ft or less.

      WNW 7kt⇓
      < 1ft

    • Saturday

      Saturday:NE wind around 7 kt becoming E in the afternoon. A slight chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      NE 7kt
      < 1ft

    • Saturday Night

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

      Light Wind
      < 1ft

    • Sunday

      Sunday:NNE wind 5 to 7 kt becoming SE in the afternoon. Sunny. Seas 1 ft or less.

      SE 7kt
      < 1ft

    • Sunday Night

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

      SSE 8kt⇓
      < 1ft

    • Monday

      Monday:Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Sunny. Seas 1 ft or less.

      ⇑S 11kt
      < 1ft

    • Monday Night

      Monday Night:S wind 9 to 12 kt becoming SW after midnight. Mostly clear. Seas 1 ft or less.

      S 12kt
      < 1ft

    • Tuesday

      Tuesday:WSW wind 8 to 12 kt becoming SSW in the afternoon. Sunny. Seas 1 ft or less.

      SSW 12kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:34 am EDT Jul 10, 2026
Forecast Valid: 4am EDT Jul 10, 2026-6pm EDT Jul 16, 2026

View Nearby Observations

Detailed Forecast


Friday
W wind 6 to 8 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Friday Night
WNW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Patchy fog after 2am. Seas 1 ft or less.
Saturday
NE wind around 7 kt becoming E in the afternoon. A slight chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Sunday
NNE wind 5 to 7 kt becoming SE in the afternoon. Sunny. Seas 1 ft or less.
Sunday Night
SSE wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Sunny. Seas 1 ft or less.
Monday Night
S wind 9 to 12 kt becoming SW after midnight. Mostly clear. Seas 1 ft or less.
Tuesday
WSW wind 8 to 12 kt becoming SSW in the afternoon. 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: 2:34 am EDT Jul 10, 2026
Forecast Valid: 4am EDT Jul 10, 2026-6pm EDT Jul 16, 2026
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