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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]

    • This Afternoon

      This Afternoon:S wind around 15 kt, with gusts as high as 21 kt. Showers likely and possibly a thunderstorm before 2pm, then showers and thunderstorms likely after 2pm. Seas 1 ft or less.

      S 15kt
      < 1ft

    • Tonight

      Tonight:SSW wind 14 to 17 kt, with gusts as high as 23 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

      SSW 17kt
      < 1ft

    • Wednesday

      Wednesday:SW wind 11 to 13 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

      SW 13kt
      < 1ft

    • Wednesday Night

      Wednesday Night:WSW wind around 9 kt becoming NNW after midnight. Partly cloudy. Seas 1 ft or less.

      WSW 9kt
      < 1ft

    • Thursday

      Thursday:N wind 5 to 10 kt becoming NE in the afternoon. Sunny. Seas 1 ft or less.

      N 10kt
      < 1ft

    • Thursday Night

      Thursday Night:Variable winds less than 5 kt becoming N around 6 kt after midnight. Mostly clear. Seas 1 ft or less.

      ⇑N 6kt
      < 1ft

    • Friday

      Friday:NE wind 6 to 8 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

      ESE 8kt
      < 1ft

    • Friday Night

      Friday Night:ESE wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.

      ESE 7kt⇓
      < 1ft

    • Saturday

      Saturday:ENE wind 5 to 8 kt becoming E in the afternoon. Mostly sunny. Seas 1 ft or less.

      E 8kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 12:40 pm EDT Jul 21, 2026
Forecast Valid: 1pm EDT Jul 21, 2026-6pm EDT Jul 27, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING

This Afternoon
S wind around 15 kt, with gusts as high as 21 kt. Showers likely and possibly a thunderstorm before 2pm, then showers and thunderstorms likely after 2pm. Seas 1 ft or less.
Tonight
SSW wind 14 to 17 kt, with gusts as high as 23 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.
Wednesday
SW wind 11 to 13 kt. A chance of showers and thunderstorms. Seas 1 ft or less.
Wednesday Night
WSW wind around 9 kt becoming NNW after midnight. Partly cloudy. Seas 1 ft or less.
Thursday
N wind 5 to 10 kt becoming NE in the afternoon. Sunny. Seas 1 ft or less.
Thursday Night
Variable winds less than 5 kt becoming N around 6 kt after midnight. Mostly clear. Seas 1 ft or less.
Friday
NE wind 6 to 8 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.
Friday Night
ESE wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.
Saturday
ENE wind 5 to 8 kt becoming E 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: 12:40 pm EDT Jul 21, 2026
Forecast Valid: 1pm EDT Jul 21, 2026-6pm EDT Jul 27, 2026
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