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Hazardous Weather Conditions

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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:S wind 9 to 13 kt. A slight chance of thunderstorms after 5pm. Seas 1 ft or less.

      S 13kt
      < 1ft

    • Tonight

      Tonight:SSE wind 13 to 16 kt becoming S 16 to 19 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.

      ⇑S 19kt
      < 1ft

    • Monday

      Monday:SSW wind 13 to 17 kt. Showers and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Seas 1 ft or less.

      SSW 17kt
      < 1ft

    • Monday Night

      Monday Night:SSW wind 6 to 9 kt becoming NNW after midnight. Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Seas 1 ft or less.

      SSW 9kt
      < 1ft

    • Tuesday

      Tuesday:N wind around 8 kt becoming SSE in the afternoon. Mostly sunny. Seas 1 ft or less.

      ESE 8kt
      < 1ft

    • Tuesday Night

      Tuesday Night:S wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas 1 ft or less.

      S 7kt⇓
      < 1ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming S 5 to 9 kt in the morning. Mostly sunny. Seas 1 ft or less.

      ⇑S 9kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SSW wind 7 to 9 kt. Partly cloudy. Seas 1 ft or less.

      SSW 9kt
      < 1ft

    • Thursday

      Thursday:SSW wind 6 to 11 kt. Mostly sunny. Seas 1 ft or less.

      SSW 11kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:37 am EDT Aug 2, 2026
Forecast Valid: 6am EDT Aug 2, 2026-6pm EDT Aug 8, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH

Today
S wind 9 to 13 kt. A slight chance of thunderstorms after 5pm. Seas 1 ft or less.
Tonight
SSE wind 13 to 16 kt becoming S 16 to 19 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.
Monday
SSW wind 13 to 17 kt. Showers and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Seas 1 ft or less.
Monday Night
SSW wind 6 to 9 kt becoming NNW after midnight. Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Seas 1 ft or less.
Tuesday
N wind around 8 kt becoming SSE in the afternoon. Mostly sunny. Seas 1 ft or less.
Tuesday Night
S wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas 1 ft or less.
Wednesday
Variable winds less than 5 kt becoming S 5 to 9 kt in the morning. Mostly sunny. Seas 1 ft or less.
Wednesday Night
SSW wind 7 to 9 kt. Partly cloudy. Seas 1 ft or less.
Thursday
SSW wind 6 to 11 kt. Mostly sunny. Seas 1 ft or less.

*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: 40.62°N 73.59°W
Last Update: 2:37 am EDT Aug 2, 2026
Forecast Valid: 6am EDT Aug 2, 2026-6pm EDT Aug 8, 2026
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