National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Independence Day

      Independence Day:SSW wind around 12 kt. Sunny. Seas around 2 ft.

      SSW 12kt
      2ft

    • Tonight

      Tonight:WSW wind 9 to 12 kt becoming WNW 6 to 9 kt after midnight. A chance of showers and thunderstorms before 9pm, then showers likely and possibly a thunderstorm between 9pm and 2am, then a slight chance of showers after 2am. Seas around 2 ft.

      WSW 12kt⇓
      2ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming ESE 5 to 8 kt in the morning. A chance of showers and thunderstorms after 2pm. Seas around 2 ft.

      ⇑ESE 8kt
      2ft

    • Sunday Night

      Sunday Night:E wind around 11 kt. A chance of showers and thunderstorms, then rain and possibly a thunderstorm after 8pm. Seas around 2 ft.

      E 11kt
      2ft

    • Monday

      Monday:E wind 16 to 18 kt. Rain and possibly a thunderstorm. Seas 4 to 5 ft.

      E 18kt
      4-5ft

    • Monday Night

      Monday Night:E wind 15 to 18 kt. Rain. Seas 6 ft subsiding to 4 ft.

      E 18kt
      6ftWaves Subsiding

    • Tuesday

      Tuesday:NE wind around 17 kt. Showers likely and possibly a thunderstorm. Seas around 4 ft.

      NE 17kt
      4ft

    • Tuesday Night

      Tuesday Night:NE wind 13 to 16 kt. A chance of showers. Seas around 4 ft.

      NE 16kt
      4ft

    • Wednesday

      Wednesday:N wind 8 to 12 kt becoming SSW in the afternoon. Mostly sunny. Seas 3 to 4 ft.

      N 12kt
      3-4ft


Associated Zone Forecast which includes this point

Last Update: 3:12 pm EDT Jul 4, 2026
Forecast Valid: 3pm EDT Jul 4, 2026-6pm EDT Jul 11, 2026

View Nearby Observations

Detailed Forecast


Independence Day
SSW wind around 12 kt. Sunny. Seas around 2 ft.
Tonight
WSW wind 9 to 12 kt becoming WNW 6 to 9 kt after midnight. A chance of showers and thunderstorms before 9pm, then showers likely and possibly a thunderstorm between 9pm and 2am, then a slight chance of showers after 2am. Seas around 2 ft.
Sunday
Variable winds less than 5 kt becoming ESE 5 to 8 kt in the morning. A chance of showers and thunderstorms after 2pm. Seas around 2 ft.
Sunday Night
E wind around 11 kt. A chance of showers and thunderstorms, then rain and possibly a thunderstorm after 8pm. Seas around 2 ft.
Monday
E wind 16 to 18 kt. Rain and possibly a thunderstorm. Seas 4 to 5 ft.
Monday Night
E wind 15 to 18 kt. Rain. Seas 6 ft subsiding to 4 ft.
Tuesday
NE wind around 17 kt. Showers likely and possibly a thunderstorm. Seas around 4 ft.
Tuesday Night
NE wind 13 to 16 kt. A chance of showers. Seas around 4 ft.
Wednesday
N wind 8 to 12 kt becoming SSW in the afternoon. Mostly sunny. Seas 3 to 4 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: 3:12 pm EDT Jul 4, 2026
Forecast Valid: 3pm EDT Jul 4, 2026-6pm EDT Jul 11, 2026
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