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

29°F

-2°C

Humidity 26%
Wind Speed N 10 mph
Barometer 30.25 in (1024.4 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 8 Dec 3:56 pm EST
Extended Forecast for

Blue Point NY

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 17. Wind chill values between 10 and 15. North wind 6 to 11 mph.

    Low: 17 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Increasing clouds, with a high near 38. Wind chill values between 10 and 20. Light and variable wind becoming southwest 5 to 9 mph in the afternoon.

    High: 38 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 34. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.

    Low: 34 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 48. Breezy, with a southwest wind 13 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Slight Chance
    Rain then
    Rain Likely
    and Breezy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34. Southwest wind 14 to 17 mph, with gusts as high as 33 mph.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 17. Wind chill values between 10 and 15. North wind 6 to 11 mph.
Tuesday
Increasing clouds, with a high near 38. Wind chill values between 10 and 20. Light and variable wind becoming southwest 5 to 9 mph in the afternoon.
Tuesday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 34. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.
Wednesday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 48. Breezy, with a southwest wind 13 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 40 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34. Southwest wind 14 to 17 mph, with gusts as high as 33 mph.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
Partly cloudy, with a low around 26.
Friday
Mostly sunny, with a high near 37.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 27.
Saturday
A chance of snow showers before 7am, then a chance of snow between 7am and noon. Partly sunny, with a high near 38. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 33.
Sunday Night
Mostly clear, with a low around 20.
Monday
Mostly sunny, with a high near 35.
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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:
12:50 pm EST Dec 8, 2025
Forecast Valid:
4pm EST Dec 8, 2025-6pm EST Dec 15, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation