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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]

    • Monday

      Monday:Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Mostly sunny. Seas 1 ft or less.

      ⇑S 11kt
      < 1ft

    • Monday Night

      Monday Night:SSW wind 10 to 12 kt. A chance of showers after 5am. Seas 1 ft or less.

      SSW 12kt
      < 1ft

    • Tuesday

      Tuesday:SSE wind 10 to 13 kt increasing to 13 to 16 kt in the afternoon. Winds could gust as high as 22 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

      ⇑SSE 16kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SSE wind around 20 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

      SSE 20kt
      < 1ft

    • Wednesday

      Wednesday:SE wind around 13 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      SE 13kt
      < 1ft

    • Wednesday Night

      Wednesday Night:NNE wind around 12 kt becoming NNW after midnight. Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.

      NNE 12kt
      < 1ft

    • Thursday

      Thursday:NNW wind 11 to 13 kt. A chance of showers. Seas 1 ft or less.

      NNW 13kt
      < 1ft

    • Thursday Night

      Thursday Night:NNW wind around 8 kt. Mostly cloudy. Seas 1 ft or less.

      NNW 8kt
      < 1ft

    • Friday

      Friday:NNW wind around 7 kt becoming WNW in the afternoon. Mostly sunny. Seas 1 ft or less.

      NNW 7kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:26 am EDT Jul 27, 2026
Forecast Valid: 2am EDT Jul 27, 2026-6pm EDT Aug 2, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH

Monday
Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Mostly sunny. Seas 1 ft or less.
Monday Night
SSW wind 10 to 12 kt. A chance of showers after 5am. Seas 1 ft or less.
Tuesday
SSE wind 10 to 13 kt increasing to 13 to 16 kt in the afternoon. Winds could gust as high as 22 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.
Tuesday Night
SSE wind around 20 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.
Wednesday
SE wind around 13 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Wednesday Night
NNE wind around 12 kt becoming NNW after midnight. Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.
Thursday
NNW wind 11 to 13 kt. A chance of showers. Seas 1 ft or less.
Thursday Night
NNW wind around 8 kt. Mostly cloudy. Seas 1 ft or less.
Friday
NNW wind around 7 kt becoming WNW in the afternoon. 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: 2:26 am EDT Jul 27, 2026
Forecast Valid: 2am EDT Jul 27, 2026-6pm EDT Aug 2, 2026
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