For More Weather Information:

New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A chance of showers after 2am.   Seas 1 ft or less.

      SSW 9kt⇓
      < 1ft

    • Saturday

      Saturday:Variable winds less than 5 kt becoming S 5 to 7 kt in the morning. A chance of showers, with thunderstorms also possible after 2pm.   Seas 1 ft or less.

      ⇑S 7kt
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. A slight chance of showers before midnight.   Seas 1 ft or less.

      Light Wind
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming SE 5 to 7 kt in the afternoon. A chance of showers before 8am.   Seas 1 ft or less.

      ⇑SE 7kt
      < 1ft

    • Sunday Night

      Sunday Night:Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Monday

      Monday:Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑SSE 8kt
      < 1ft

    • Monday Night

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

      S 6kt⇓
      < 1ft

    • Tuesday

      Tuesday:S wind 5 to 8 kt increasing to 9 to 12 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑S 12kt
      < 1ft

    • Tuesday Night

      Tuesday Night:S wind 8 to 13 kt becoming SW after midnight. Mostly cloudy. Seas 1 ft or less.

      S 13kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:46 pm EDT Jun 26, 2026
Forecast Valid: 4pm EDT Jun 26, 2026-6pm EDT Jul 3, 2026

View Nearby Observations

Detailed Forecast


Tonight
SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A chance of showers after 2am. Seas 1 ft or less.
Saturday
Variable winds less than 5 kt becoming S 5 to 7 kt in the morning. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. A slight chance of showers before midnight. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming SE 5 to 7 kt in the afternoon. A chance of showers before 8am. Seas 1 ft or less.
Sunday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Monday Night
S wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.
Tuesday
S wind 5 to 8 kt increasing to 9 to 12 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Tuesday Night
S wind 8 to 13 kt becoming SW after midnight. Mostly cloudy. 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.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

Point Forecast: 40.62°N 73.59°W
Last Update: 2:46 pm EDT Jun 26, 2026
Forecast Valid: 4pm EDT Jun 26, 2026-6pm EDT Jul 3, 2026
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data