Dangerous, Heat Wave Persists in the Eastern U.S.; Severe Weather Expected in the Central Plains and Mid-Atlantic

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Severe thunderstorms are expected to produce damaging wind gusts from the Upper Ohio Valley into the Mid Atlantic, and across the central Great Plains this afternoon and evening. Large hail and heavy rain is also possible across the Great Plains. Read More >

Hazardous Weather Conditions

For More Weather Information:

New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Independence Day

      Independence Day:W wind 7 to 10 kt becoming SSW 10 to 13 kt in the afternoon. Scattered showers and thunderstorms after 2pm.   Seas around 2 ft.

      ⇑SSW 13kt
      2ft

    • Saturday Night

      Saturday Night:SW wind 6 to 9 kt becoming WNW after midnight. Scattered showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 2am, then a chance of showers after 2am.   Seas around 2 ft.

      SW 9kt
      2ft

    • Sunday

      Sunday:ENE wind 8 to 10 kt becoming ESE in the afternoon. A chance of showers, mainly before 2pm.   Seas around 2 ft.

      ESE 10kt
      2ft

    • Sunday Night

      Sunday Night:ESE wind around 9 kt. A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm.   Seas around 2 ft.

      ESE 9kt
      2ft

    • Monday

      Monday:E wind 12 to 15 kt. Showers likely and possibly a thunderstorm.   Seas 3 to 4 ft.

      E 15kt
      3-4ft

    • Monday Night

      Monday Night:ESE wind 13 to 15 kt. Showers likely and possibly a thunderstorm.   Seas 3 to 4 ft.

      ESE 15kt
      3-4ft

    • Tuesday

      Tuesday:E wind 13 to 15 kt. A chance of showers, with thunderstorms also possible after 2pm.   Seas around 3 ft.

      E 15kt
      3ft

    • Tuesday Night

      Tuesday Night:ENE wind around 11 kt. A chance of showers and thunderstorms.   Seas 3 to 4 ft.

      ENE 11kt
      3-4ft

    • Wednesday

      Wednesday:NE wind around 9 kt becoming S in the afternoon. Partly sunny. Seas around 3 ft.

      NE 9kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 11:18 pm EDT Jul 3, 2026
Forecast Valid: 2am EDT Jul 4, 2026-6pm EDT Jul 10, 2026

View Nearby Observations

Detailed Forecast


Independence Day
W wind 7 to 10 kt becoming SSW 10 to 13 kt in the afternoon. Scattered showers and thunderstorms after 2pm. Seas around 2 ft.
Saturday Night
SW wind 6 to 9 kt becoming WNW after midnight. Scattered showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 2am, then a chance of showers after 2am. Seas around 2 ft.
Sunday
ENE wind 8 to 10 kt becoming ESE in the afternoon. A chance of showers, mainly before 2pm. Seas around 2 ft.
Sunday Night
ESE wind around 9 kt. A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Seas around 2 ft.
Monday
E wind 12 to 15 kt. Showers likely and possibly a thunderstorm. Seas 3 to 4 ft.
Monday Night
ESE wind 13 to 15 kt. Showers likely and possibly a thunderstorm. Seas 3 to 4 ft.
Tuesday
E wind 13 to 15 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas around 3 ft.
Tuesday Night
ENE wind around 11 kt. A chance of showers and thunderstorms. Seas 3 to 4 ft.
Wednesday
NE wind around 9 kt becoming S in the afternoon. Partly sunny. Seas around 3 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: 11:18 pm EDT Jul 3, 2026
Forecast Valid: 2am EDT Jul 4, 2026-6pm EDT Jul 10, 2026
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