National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

For More Weather Information:

New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:N wind 5 to 8 kt becoming E 10 to 13 kt in the evening. A chance of rain and snow after 4am. Seas around 2 ft.

      ⇑E 13kt
      2ft

    • Sunday

      Sunday:E wind 17 to 22 kt, with gusts as high as 29 kt. Rain and snow, becoming all snow after 4pm. Seas 3 ft building to 5 ft.

      E 22kt
      Waves Building5ft

    • Sunday Night

      Sunday Night:ENE wind 25 to 30 kt becoming NNE 34 to 39 kt. Winds could gust as high as 48 kt. Snow with areas of blowing snow. The snow could be heavy at times. Seas 6 ft building to 9 ft.

      ⇑NNE 39kt
      Waves Building9ft

      Storm Warning
      Storm Warning

    • Monday

      Monday:N wind 31 to 36 kt decreasing to 25 to 30 kt in the afternoon. Winds could gust as high as 46 kt. Snow with areas of blowing snow before 1pm, then snow likely with areas of blowing snow after 1pm. The snow could be heavy at times. Seas around 10 ft.

      N 36kt⇓
      10ft

      Storm Warning
      Storm Warning

    • Monday Night

      Monday Night:NW wind 20 to 22 kt, with gusts as high as 28 kt. Areas of blowing snow and a chance of snow before 10pm, then areas of blowing snow after 10pm. Seas 8 ft subsiding to 6 ft.

      NW 22kt
      8ftWaves Subsiding

    • Tuesday

      Tuesday:WNW wind 18 to 22 kt. Mostly sunny. Seas 4 to 5 ft.

      WNW 22kt
      4-5ft

    • Tuesday Night

      Tuesday Night:WNW wind 14 to 17 kt becoming W 11 to 14 kt after midnight. Increasing clouds. Seas 2 to 3 ft.

      WNW 17kt⇓
      2-3ft

    • Wednesday

      Wednesday:S wind 13 to 16 kt. A chance of snow. Seas 2 ft building to 4 ft.

      S 16kt
      Waves Building4ft

    • Wednesday Night

      Wednesday Night:SW wind 15 to 18 kt. A chance of rain. Seas around 5 ft.

      SW 18kt
      5ft


Associated Zone Forecast which includes this point

Last Update: 3:48 pm EST Feb 21, 2026
Forecast Valid: 6pm EST Feb 21, 2026-6pm EST Feb 28, 2026

View Nearby Observations

Detailed Forecast

...STORM WARNING IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY

Tonight
N wind 5 to 8 kt becoming E 10 to 13 kt in the evening. A chance of rain and snow after 4am. Seas around 2 ft.
Sunday
E wind 17 to 22 kt, with gusts as high as 29 kt. Rain and snow, becoming all snow after 4pm. Seas 3 ft building to 5 ft.
Sunday Night
ENE wind 25 to 30 kt becoming NNE 34 to 39 kt. Winds could gust as high as 48 kt. Snow with areas of blowing snow. The snow could be heavy at times. Seas 6 ft building to 9 ft.
Monday
N wind 31 to 36 kt decreasing to 25 to 30 kt in the afternoon. Winds could gust as high as 46 kt. Snow with areas of blowing snow before 1pm, then snow likely with areas of blowing snow after 1pm. The snow could be heavy at times. Seas around 10 ft.
Monday Night
NW wind 20 to 22 kt, with gusts as high as 28 kt. Areas of blowing snow and a chance of snow before 10pm, then areas of blowing snow after 10pm. Seas 8 ft subsiding to 6 ft.
Tuesday
WNW wind 18 to 22 kt. Mostly sunny. Seas 4 to 5 ft.
Tuesday Night
WNW wind 14 to 17 kt becoming W 11 to 14 kt after midnight. Increasing clouds. Seas 2 to 3 ft.
Wednesday
S wind 13 to 16 kt. A chance of snow. Seas 2 ft building to 4 ft.
Wednesday Night
SW wind 15 to 18 kt. A chance of rain. Seas around 5 ft.

*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...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

Point Forecast: 40.53°N 73.44°W
Last Update: 3:48 pm EST Feb 21, 2026
Forecast Valid: 6pm EST Feb 21, 2026-6pm EST Feb 28, 2026
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data