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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Today

      Today:S wind 9 to 12 kt increasing to 13 to 16 kt in the afternoon. Winds could gust as high as 22 kt. Mostly sunny. Seas 2 to 3 ft.

      ⇑S 16kt
      2-3ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:SW wind 16 to 21 kt, with gusts as high as 27 kt. A slight chance of showers and thunderstorms after 11pm.   Seas 4 to 5 ft.

      SW 21kt
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Wednesday

      Wednesday:SSW wind 13 to 16 kt increasing to 16 to 19 kt in the afternoon. A slight chance of showers and thunderstorms after 2pm.   Seas 3 to 4 ft.

      ⇑SSW 19kt
      3-4ft

    • Wednesday Night

      Wednesday Night:SW wind 19 to 22 kt decreasing to 15 to 18 kt after midnight. A slight chance of showers and thunderstorms.   Seas 4 to 5 ft.

      SW 22kt⇓
      4-5ft

    • Thursday

      Thursday:SSW wind 11 to 16 kt. Sunny. Seas around 3 ft.

      SSW 16kt
      3ft

    • Thursday Night

      Thursday Night:WSW wind 16 to 19 kt decreasing to 12 to 15 kt after midnight. Mostly clear. Seas 3 to 4 ft.

      WSW 19kt⇓
      3-4ft

    • Friday

      Friday:W wind 8 to 11 kt becoming SSW 12 to 15 kt in the afternoon. A chance of showers after 2pm.   Seas 2 to 3 ft.

      ⇑SSW 15kt
      2-3ft

    • Friday Night

      Friday Night:W wind 6 to 10 kt. A chance of showers.   Seas 2 to 3 ft.

      W 10kt
      2-3ft

    • Independence Day

      Independence Day:W wind 5 to 8 kt becoming SSW 9 to 12 kt in the afternoon. A chance of showers.   Seas around 2 ft.

      ⇑SSW 12kt
      2ft


Associated Zone Forecast which includes this point

Last Update: 7:08 am EDT Jun 30, 2026
Forecast Valid: 10am EDT Jun 30, 2026-6pm EDT Jul 6, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON

Today
S wind 9 to 12 kt increasing to 13 to 16 kt in the afternoon. Winds could gust as high as 22 kt. Mostly sunny. Seas 2 to 3 ft.
Tonight
SW wind 16 to 21 kt, with gusts as high as 27 kt. A slight chance of showers and thunderstorms after 11pm. Seas 4 to 5 ft.
Wednesday
SSW wind 13 to 16 kt increasing to 16 to 19 kt in the afternoon. A slight chance of showers and thunderstorms after 2pm. Seas 3 to 4 ft.
Wednesday Night
SW wind 19 to 22 kt decreasing to 15 to 18 kt after midnight. A slight chance of showers and thunderstorms. Seas 4 to 5 ft.
Thursday
SSW wind 11 to 16 kt. Sunny. Seas around 3 ft.
Thursday Night
WSW wind 16 to 19 kt decreasing to 12 to 15 kt after midnight. Mostly clear. Seas 3 to 4 ft.
Friday
W wind 8 to 11 kt becoming SSW 12 to 15 kt in the afternoon. A chance of showers after 2pm. Seas 2 to 3 ft.
Friday Night
W wind 6 to 10 kt. A chance of showers. Seas 2 to 3 ft.
Independence Day
W wind 5 to 8 kt becoming SSW 9 to 12 kt in the afternoon. A chance of showers. Seas around 2 ft.

*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: 40.53°N 73.44°W
Last Update: 7:08 am EDT Jun 30, 2026
Forecast Valid: 10am EDT Jun 30, 2026-6pm EDT Jul 6, 2026
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