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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:SSW wind 16 to 19 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

      SSW 19kt
      < 1ft

    • Tonight

      Tonight:SW wind 8 to 10 kt becoming N after midnight. A slight chance of showers and thunderstorms before 11pm. Seas 1 ft or less.

      SW 10kt
      < 1ft

    • Tuesday

      Tuesday:N wind 5 to 7 kt becoming SE in the afternoon. Mostly sunny. Seas 1 ft or less.

      SE 7kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SE wind around 6 kt becoming variable and less than 5 kt in the evening. A slight chance of showers after 2am. Seas 1 ft or less.

      SE 6kt⇓
      < 1ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming S 5 to 8 kt in the morning. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      ⇑S 8kt
      < 1ft

    • Wednesday Night

      Wednesday Night:S wind 7 to 9 kt. Mostly cloudy. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Thursday

      Thursday:SSW wind 7 to 10 kt increasing to 11 to 14 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑SSW 14kt
      < 1ft

    • Thursday Night

      Thursday Night:SW wind 13 to 16 kt decreasing to 9 to 12 kt after midnight. A chance of showers. Seas 1 ft or less.

      SW 16kt⇓
      < 1ft

    • Friday

      Friday:SSW wind 7 to 12 kt. A chance of showers. Seas 1 ft or less.

      SSW 12kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:12 am EDT Aug 3, 2026
Forecast Valid: 8am EDT Aug 3, 2026-6pm EDT Aug 9, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

Today
SSW wind 16 to 19 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.
Tonight
SW wind 8 to 10 kt becoming N after midnight. A slight chance of showers and thunderstorms before 11pm. Seas 1 ft or less.
Tuesday
N wind 5 to 7 kt becoming SE in the afternoon. Mostly sunny. Seas 1 ft or less.
Tuesday Night
SE wind around 6 kt becoming variable and less than 5 kt in the evening. A slight chance of showers after 2am. Seas 1 ft or less.
Wednesday
Variable winds less than 5 kt becoming S 5 to 8 kt in the morning. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Wednesday Night
S wind 7 to 9 kt. Mostly cloudy. Seas 1 ft or less.
Thursday
SSW wind 7 to 10 kt increasing to 11 to 14 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Thursday Night
SW wind 13 to 16 kt decreasing to 9 to 12 kt after midnight. A chance of showers. Seas 1 ft or less.
Friday
SSW wind 7 to 12 kt. A chance of showers. Seas 1 ft or less.

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: 40.62°N 73.59°W
Last Update: 2:12 am EDT Aug 3, 2026
Forecast Valid: 8am EDT Aug 3, 2026-6pm EDT Aug 9, 2026
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