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Hazardous Weather Conditions

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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:WNW wind 11 to 14 kt decreasing to 7 to 10 kt in the afternoon. Mostly sunny. Seas 3 to 4 ft.

      WNW 14kt⇓
      3-4ft

    • Tonight

      Tonight:NNW wind 5 to 8 kt becoming E 11 to 14 kt after midnight. A chance of rain and snow after 4am. Seas 2 to 3 ft.

      ⇑E 14kt
      2-3ft

    • Sunday

      Sunday:E wind 18 to 21 kt increasing to 22 to 25 kt in the afternoon. Rain and snow likely before 10am, then snow. Seas 3 ft building to 5 ft.

      ⇑E 25kt
      Waves Building5ft

    • Sunday Night

      Sunday Night:ENE wind 27 to 32 kt becoming NE 32 to 37 kt after midnight. Winds could gust as high as 45 kt. Snow. The snow could be heavy at times. Seas 6 ft building to 10 ft.

      ⇑NE 37kt
      Waves Building10ft

    • Monday

      Monday:N wind 34 to 37 kt decreasing to 28 to 31 kt in the afternoon. Winds could gust as high as 45 kt. Snow. The snow could be heavy at times. Seas 10 to 11 ft.

      N 37kt⇓
      10-11ft

    • Monday Night

      Monday Night:NW wind 21 to 24 kt. Cloudy, then gradually becoming partly cloudy. Seas 8 ft subsiding to 6 ft.

      NW 24kt
      8ftWaves Subsiding

    • Tuesday

      Tuesday:WNW wind 16 to 21 kt. Mostly sunny. Seas 4 to 5 ft.

      WNW 21kt
      4-5ft

    • Tuesday Night

      Tuesday Night:WNW wind 12 to 15 kt becoming W 9 to 12 kt after midnight. Mostly cloudy. Seas 2 to 3 ft.

      WNW 15kt⇓
      2-3ft

    • Wednesday

      Wednesday:SSW wind 11 to 15 kt. A chance of snow. Seas 2 to 3 ft.

      SSW 15kt
      2-3ft


Associated Zone Forecast which includes this point

Last Update: 3:41 am EST Feb 21, 2026
Forecast Valid: 7am EST Feb 21, 2026-6pm EST Feb 27, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EST EARLY THIS

Today
WNW wind 11 to 14 kt decreasing to 7 to 10 kt in the afternoon. Mostly sunny. Seas 3 to 4 ft.
Tonight
NNW wind 5 to 8 kt becoming E 11 to 14 kt after midnight. A chance of rain and snow after 4am. Seas 2 to 3 ft.
Sunday
E wind 18 to 21 kt increasing to 22 to 25 kt in the afternoon. Rain and snow likely before 10am, then snow. Seas 3 ft building to 5 ft.
Sunday Night
ENE wind 27 to 32 kt becoming NE 32 to 37 kt after midnight. Winds could gust as high as 45 kt. Snow. The snow could be heavy at times. Seas 6 ft building to 10 ft.
Monday
N wind 34 to 37 kt decreasing to 28 to 31 kt in the afternoon. Winds could gust as high as 45 kt. Snow. The snow could be heavy at times. Seas 10 to 11 ft.
Monday Night
NW wind 21 to 24 kt. Cloudy, then gradually becoming partly cloudy. Seas 8 ft subsiding to 6 ft.
Tuesday
WNW wind 16 to 21 kt. Mostly sunny. Seas 4 to 5 ft.
Tuesday Night
WNW wind 12 to 15 kt becoming W 9 to 12 kt after midnight. Mostly cloudy. Seas 2 to 3 ft.
Wednesday
SSW wind 11 to 15 kt. A chance of snow. Seas 2 to 3 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: 3:41 am EST Feb 21, 2026
Forecast Valid: 7am EST Feb 21, 2026-6pm EST Feb 27, 2026
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