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

40°F

4°C

Humidity 58%
Wind Speed W 10 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 4 Dec 10:56 am EST
Extended Forecast for

Blue Point NY

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 40. Breezy, with a west wind 15 to 21 mph.

    High: 40 °F

    Decreasing
    Clouds and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 18. Wind chill values between 5 and 10. Blustery, with a northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.

    Low: 18 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Friday

    Friday: A 20 percent chance of light snow after 4pm. Increasing clouds, with a high near 37. Wind chill values between 10 and 20. Light and variable wind becoming southeast 5 to 7 mph in the morning.

    High: 37 °F

    Mostly Sunny
    then Slight
    Chance Light
    Snow

  • Friday Night

    Friday Night: A chance of snow before 4am, then a chance of rain. Mostly cloudy, with a low around 30. Light and variable wind. Chance of precipitation is 40%.

    Low: 30 °F

    Chance Light
    Snow then
    Chance
    Rain/Snow

  • Saturday

    Saturday: A 30 percent chance of light rain, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 42. North wind 5 to 9 mph becoming west in the afternoon.

    High: 42 °F

    Chance Light
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 40. Breezy, with a west wind 15 to 21 mph.
Tonight
Mostly clear, with a low around 18. Wind chill values between 5 and 10. Blustery, with a northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.
Friday
A 20 percent chance of light snow after 4pm. Increasing clouds, with a high near 37. Wind chill values between 10 and 20. Light and variable wind becoming southeast 5 to 7 mph in the morning.
Friday Night
A chance of snow before 4am, then a chance of rain. Mostly cloudy, with a low around 30. Light and variable wind. Chance of precipitation is 40%.
Saturday
A 30 percent chance of light rain, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 42. North wind 5 to 9 mph becoming west in the afternoon.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Partly sunny, with a high near 42.
Sunday Night
Mostly cloudy, with a low around 23.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Blue Point NY
 40.75°N 73.04°W (Elev. 30 ft)
Last Update:
6:44 am EST Dec 4, 2025
Forecast Valid:
11am EST Dec 4, 2025-6pm EST Dec 10, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation