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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:WNW wind around 13 kt. Mostly sunny. Seas 1 ft or less.

      WNW 13kt
      < 1ft

    • Tonight

      Tonight:NNW wind 9 to 13 kt. Mostly clear. Seas 1 ft or less.

      NNW 13kt
      < 1ft

    • Tuesday

      Tuesday:NW wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 12kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SSW wind 11 to 14 kt decreasing to 6 to 9 kt after midnight. Winds could gust as high as 20 kt. Partly cloudy. Seas 1 ft or less.

      SSW 14kt⇓
      < 1ft

    • Wednesday

      Wednesday:SSE wind 5 to 10 kt. A chance of showers, mainly after 2pm. Seas 1 ft or less.

      SSE 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:S wind around 8 kt. A chance of showers before 8pm. Seas 1 ft or less.

      S 8kt
      < 1ft

    • Thursday

      Thursday:S wind 13 to 16 kt increasing to 18 to 21 kt in the afternoon. Winds could gust as high as 27 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      ⇑S 21kt
      < 1ft

    • Thursday Night

      Thursday Night:WSW wind 10 to 15 kt, with gusts as high as 22 kt. A chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

      WSW 15kt
      < 1ft

    • Juneteenth

      Juneteenth:WSW wind 8 to 12 kt. A chance of showers. Seas 1 ft or less.

      WSW 12kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 3:15 pm EDT Jun 15, 2026
Forecast Valid: 3pm EDT Jun 15, 2026-6pm EDT Jun 22, 2026

View Nearby Observations

Detailed Forecast


This Afternoon
WNW wind around 13 kt. Mostly sunny. Seas 1 ft or less.
Tonight
NNW wind 9 to 13 kt. Mostly clear. Seas 1 ft or less.
Tuesday
NW wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
SSW wind 11 to 14 kt decreasing to 6 to 9 kt after midnight. Winds could gust as high as 20 kt. Partly cloudy. Seas 1 ft or less.
Wednesday
SSE wind 5 to 10 kt. A chance of showers, mainly after 2pm. Seas 1 ft or less.
Wednesday Night
S wind around 8 kt. A chance of showers before 8pm. Seas 1 ft or less.
Thursday
S wind 13 to 16 kt increasing to 18 to 21 kt in the afternoon. Winds could gust as high as 27 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Thursday Night
WSW wind 10 to 15 kt, with gusts as high as 22 kt. A chance of showers and thunderstorms before 8pm. Seas 1 ft or less.
Juneteenth
WSW wind 8 to 12 kt. A chance of showers. Seas 1 ft or less.

*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: 3:15 pm EDT Jun 15, 2026
Forecast Valid: 3pm EDT Jun 15, 2026-6pm EDT Jun 22, 2026
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