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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

41°F

5°C

Humidity 47%
Wind Speed Calm
Barometer 30.03 in (1016.8 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 3 Dec 3:56 pm EST
Extended Forecast for

Fort Salonga NY

  • Tonight

    Tonight: Mostly clear, with a low around 31. Wind chill values between 20 and 25. West wind 6 to 13 mph.

    Low: 31 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 41. Wind chill values between 25 and 30. Breezy, with a west wind 13 to 21 mph, with gusts as high as 34 mph.

    High: 41 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 19. Wind chill values between 10 and 15. Blustery, with a north wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 37 mph.

    Low: 19 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Friday

    Friday: A 20 percent chance of light snow after 1pm. Increasing clouds, with a high near 33. Wind chill values between 10 and 20. North wind 5 to 7 mph becoming south in the afternoon.

    High: 33 °F

    Mostly Sunny
    then Slight
    Chance Light
    Snow

  • Friday Night

    Friday Night: A 30 percent chance of light snow. Cloudy, with a low around 29. South wind around 6 mph becoming north after midnight.

    Low: 29 °F

    Chance Light
    Snow

  • Saturday

    Saturday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 40.

    High: 40 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 31. Wind chill values between 20 and 25. West wind 6 to 13 mph.
Thursday
Increasing clouds, with a high near 41. Wind chill values between 25 and 30. Breezy, with a west wind 13 to 21 mph, with gusts as high as 34 mph.
Thursday Night
Mostly clear, with a low around 19. Wind chill values between 10 and 15. Blustery, with a north wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 37 mph.
Friday
A 20 percent chance of light snow after 1pm. Increasing clouds, with a high near 33. Wind chill values between 10 and 20. North wind 5 to 7 mph becoming south in the afternoon.
Friday Night
A 30 percent chance of light snow. Cloudy, with a low around 29. South wind around 6 mph becoming north after midnight.
Saturday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 37.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 30.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Salonga NY
 40.92°N 73.3°W (Elev. 26 ft)
Last Update:
4:09 pm EST Dec 3, 2025
Forecast Valid:
4pm EST Dec 3, 2025-6pm EST Dec 10, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation