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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:Variable winds less than 5 kt becoming SSW 6 to 11 kt in the morning. Sunny. Seas 1 ft or less.

      ⇑SSW 11kt
      < 1ft

    • Tonight

      Tonight:SSW wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.

      SSW 6kt⇓
      < 1ft

    • Monday

      Monday:SE wind 5 to 8 kt increasing to 11 to 14 kt in the afternoon. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

      ⇑SE 14kt
      < 1ft

    • Monday Night

      Monday Night:S wind 14 to 17 kt becoming SW 11 to 14 kt after midnight. Showers and possibly a thunderstorm. Seas 1 ft or less.

      S 17kt⇓
      < 1ft

    • Tuesday

      Tuesday:NNW wind 7 to 9 kt. A chance of showers. Seas 1 ft or less.

      NNW 9kt
      < 1ft

    • Tuesday Night

      Tuesday Night:Variable winds less than 5 kt becoming NNW 5 to 7 kt in the evening. Partly cloudy. Seas 1 ft or less.

      ⇑NNW 7kt
      < 1ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 8kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.

      SSW 7kt⇓
      < 1ft

    • Thursday

      Thursday:Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑S 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:19 am EDT Jun 21, 2026
Forecast Valid: 8am EDT Jun 21, 2026-6pm EDT Jun 27, 2026

View Nearby Observations

Detailed Forecast


Today
Variable winds less than 5 kt becoming SSW 6 to 11 kt in the morning. Sunny. Seas 1 ft or less.
Tonight
SSW wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.
Monday
SE wind 5 to 8 kt increasing to 11 to 14 kt in the afternoon. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.
Monday Night
S wind 14 to 17 kt becoming SW 11 to 14 kt after midnight. Showers and possibly a thunderstorm. Seas 1 ft or less.
Tuesday
NNW wind 7 to 9 kt. A chance of showers. Seas 1 ft or less.
Tuesday Night
Variable winds less than 5 kt becoming NNW 5 to 7 kt in the evening. Partly cloudy. Seas 1 ft or less.
Wednesday
Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. Sunny. Seas 1 ft or less.
Wednesday Night
SSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.
Thursday
Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Sunny. 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: 2:19 am EDT Jun 21, 2026
Forecast Valid: 8am EDT Jun 21, 2026-6pm EDT Jun 27, 2026
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