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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]

    • This Afternoon

      This Afternoon:SSW wind around 25 kt, with gusts as high as 34 kt. A slight chance of showers and thunderstorms. Seas around 6 ft.

      SSW 25kt
      6ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:WSW wind 18 to 21 kt becoming W 14 to 17 kt after midnight. Winds could gust as high as 33 kt. Mostly cloudy. Seas 6 ft subsiding to 4 ft.

      WSW 21kt⇓
      6ftWaves Subsiding

      Small Craft Advisory
      Small Craft Advisory

    • Juneteenth

      Juneteenth:W wind 12 to 15 kt becoming SW in the afternoon. Winds could gust as high as 22 kt. Cloudy through mid morning, then gradual clearing. Seas around 4 ft.

      SW 15kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday Night

      Friday Night:WSW wind 11 to 14 kt becoming WNW in the evening. Mostly clear. Seas 3 to 4 ft.

      WNW 14kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Saturday

      Saturday:WNW wind 13 to 18 kt. Sunny. Seas around 3 ft.

      WNW 18kt
      3ft

    • Saturday Night

      Saturday Night:WNW wind 9 to 12 kt. Mostly clear. Seas 2 to 3 ft.

      WNW 12kt
      2-3ft

    • Sunday

      Sunday:WNW wind 8 to 13 kt becoming SSW in the afternoon. Sunny. Seas around 2 ft.

      SSW 13kt
      2ft

    • Sunday Night

      Sunday Night:SSW wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas around 2 ft.

      SSW 9kt⇓
      2ft

    • Monday

      Monday:SE wind 8 to 13 kt increasing to 20 to 25 kt. Showers likely. Seas 2 ft building to 5 ft.

      ⇑SE 25kt
      Waves Building5ft


Associated Zone Forecast which includes this point

Last Update: 2:48 pm EDT Jun 18, 2026
Forecast Valid: 3pm EDT Jun 18, 2026-6pm EDT Jun 25, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT...

This Afternoon
SSW wind around 25 kt, with gusts as high as 34 kt. A slight chance of showers and thunderstorms. Seas around 6 ft.
Tonight
WSW wind 18 to 21 kt becoming W 14 to 17 kt after midnight. Winds could gust as high as 33 kt. Mostly cloudy. Seas 6 ft subsiding to 4 ft.
Juneteenth
W wind 12 to 15 kt becoming SW in the afternoon. Winds could gust as high as 22 kt. Cloudy through mid morning, then gradual clearing. Seas around 4 ft.
Friday Night
WSW wind 11 to 14 kt becoming WNW in the evening. Mostly clear. Seas 3 to 4 ft.
Saturday
WNW wind 13 to 18 kt. Sunny. Seas around 3 ft.
Saturday Night
WNW wind 9 to 12 kt. Mostly clear. Seas 2 to 3 ft.
Sunday
WNW wind 8 to 13 kt becoming SSW in the afternoon. Sunny. Seas around 2 ft.
Sunday Night
SSW wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas around 2 ft.
Monday
SE wind 8 to 13 kt increasing to 20 to 25 kt. Showers likely. Seas 2 ft building to 5 ft.

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: 40.53°N 73.44°W
Last Update: 2:48 pm EDT Jun 18, 2026
Forecast Valid: 3pm EDT Jun 18, 2026-6pm EDT Jun 25, 2026
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