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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Overnight

      Overnight:SE wind around 8 kt becoming S. A chance of showers, then showers likely and possibly a thunderstorm after 2am. Seas 1 ft or less.

      SE 8kt
      < 1ft

    • Thursday

      Thursday:SW wind around 11 kt. Showers and thunderstorms likely before 2pm, then a chance of thunderstorms after 5pm. Seas 1 ft or less.

      SW 11kt
      < 1ft

    • Thursday Night

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

      WSW 7kt
      < 1ft

    • Friday

      Friday:NW wind 5 to 7 kt becoming W in the afternoon. A slight chance of showers after 2pm. Seas 1 ft or less.

      W 7kt
      < 1ft

    • Friday Night

      Friday Night:WNW wind around 8 kt becoming NNW after midnight. A slight chance of showers before 8pm. Seas 1 ft or less.

      WNW 8kt
      < 1ft

    • Saturday

      Saturday:N wind around 10 kt. Sunny. Seas 1 ft or less.

      N 10kt
      < 1ft

    • Saturday Night

      Saturday Night:NE wind around 8 kt. Partly cloudy. Seas 1 ft or less.

      NE 8kt
      < 1ft

    • Sunday

      Sunday:NNE wind around 8 kt becoming ENE in the afternoon. Sunny. Seas 1 ft or less.

      NNE 8kt
      < 1ft

    • Sunday Night

      Sunday 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: 3:08 pm EDT Sep 2, 2026
Forecast Valid: 12am EDT Sep 3, 2026-6pm EDT Sep 9, 2026

View Nearby Observations

Detailed Forecast


Overnight
SE wind around 8 kt becoming S. A chance of showers, then showers likely and possibly a thunderstorm after 2am. Seas 1 ft or less.
Thursday
SW wind around 11 kt. Showers and thunderstorms likely before 2pm, then a chance of thunderstorms after 5pm. Seas 1 ft or less.
Thursday Night
WSW wind 5 to 7 kt becoming WNW 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
NW wind 5 to 7 kt becoming W in the afternoon. A slight chance of showers after 2pm. Seas 1 ft or less.
Friday Night
WNW wind around 8 kt becoming NNW after midnight. A slight chance of showers before 8pm. Seas 1 ft or less.
Saturday
N wind around 10 kt. Sunny. Seas 1 ft or less.
Saturday Night
NE wind around 8 kt. Partly cloudy. Seas 1 ft or less.
Sunday
NNE wind around 8 kt becoming ENE in the afternoon. Sunny. Seas 1 ft or less.
Sunday 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: 3:08 pm EDT Sep 2, 2026
Forecast Valid: 12am EDT Sep 3, 2026-6pm EDT Sep 9, 2026
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