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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:SSE wind around 10 kt. Mostly sunny. Seas 1 ft or less.

      SSE 10kt
      < 1ft

    • Tonight

      Tonight:SSE wind 8 to 10 kt. Showers and possibly a thunderstorm, mainly after 2am. Some of the storms could produce heavy rainfall. Seas 1 ft or less.

      SSE 10kt
      < 1ft

    • Sunday

      Sunday:SSE wind around 9 kt becoming NW in the afternoon. Showers and possibly a thunderstorm before 2pm, then a slight chance of showers. Some of the storms could produce heavy rainfall. Seas 1 ft or less.

      SSE 9kt
      < 1ft

    • Sunday Night

      Sunday Night:WNW wind 5 to 8 kt becoming SW in the evening. A chance of showers, mainly after 5am. Seas 1 ft or less.

      W 8kt
      < 1ft

    • Monday

      Monday:NNW wind around 12 kt. A chance of showers, mainly before 8am. Seas 1 ft or less.

      NNW 12kt
      < 1ft

    • Monday Night

      Monday Night:NNE wind 10 to 12 kt. Mostly clear. Seas 1 ft or less.

      NNE 12kt
      < 1ft

    • Tuesday

      Tuesday:NE wind 7 to 9 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

      NE 9kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SE wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

      SE 6kt⇓
      < 1ft

    • Wednesday

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

      ⇑S 8kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:17 pm EDT Sep 12, 2026
Forecast Valid: 2pm EDT Sep 12, 2026-6pm EDT Sep 18, 2026

View Nearby Observations

Detailed Forecast


This Afternoon
SSE wind around 10 kt. Mostly sunny. Seas 1 ft or less.
Tonight
SSE wind 8 to 10 kt. Showers and possibly a thunderstorm, mainly after 2am. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Sunday
SSE wind around 9 kt becoming NW in the afternoon. Showers and possibly a thunderstorm before 2pm, then a slight chance of showers. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Sunday Night
WNW wind 5 to 8 kt becoming SW in the evening. A chance of showers, mainly after 5am. Seas 1 ft or less.
Monday
NNW wind around 12 kt. A chance of showers, mainly before 8am. Seas 1 ft or less.
Monday Night
NNE wind 10 to 12 kt. Mostly clear. Seas 1 ft or less.
Tuesday
NE wind 7 to 9 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
SE wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.
Wednesday
Variable winds less than 5 kt becoming S 5 to 8 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: 2:17 pm EDT Sep 12, 2026
Forecast Valid: 2pm EDT Sep 12, 2026-6pm EDT Sep 18, 2026
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