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.

A Few Clouds

26°F

-3°C

Humidity 48%
Wind Speed N 10 mph
Barometer 30.27 in (1025.2 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 4 Dec 11:56 pm EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Partly cloudy, with a low around 19. Wind chill values between 5 and 15. Blustery, with a north wind 15 to 22 mph, with gusts as high as 32 mph.

    Low: 19 °F

    Partly Cloudy
    and Blustery

  • Friday

    Friday: Increasing clouds, with a high near 37. Wind chill values between 10 and 20. Northeast wind 6 to 10 mph becoming southeast in the afternoon.

    High: 37 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A chance of rain and snow before 1am, then a chance of rain. Cloudy, with a low around 36. Southeast wind around 7 mph becoming north after midnight. Chance of precipitation is 40%.

    Low: 36 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 43. Northwest wind 6 to 13 mph becoming west in the afternoon.

    High: 43 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West wind 11 to 14 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 36. Breezy.

    High: 36 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 25. Blustery.

    Low: 25 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 19. Wind chill values between 5 and 15. Blustery, with a north wind 15 to 22 mph, with gusts as high as 32 mph.
Friday
Increasing clouds, with a high near 37. Wind chill values between 10 and 20. Northeast wind 6 to 10 mph becoming southeast in the afternoon.
Friday Night
A chance of rain and snow before 1am, then a chance of rain. Cloudy, with a low around 36. Southeast wind around 7 mph becoming north after midnight. Chance of precipitation is 40%.
Saturday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 43. Northwest wind 6 to 13 mph becoming west in the afternoon.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West wind 11 to 14 mph.
Sunday
Partly sunny, with a high near 42.
Sunday Night
Mostly cloudy, with a low around 30.
Monday
Mostly sunny, with a high near 36. Breezy.
Monday Night
Mostly clear, with a low around 25. Blustery.
Tuesday
Partly sunny, with a high near 42. Breezy.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 37. Breezy.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 39.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 44. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
10:17 pm EST Dec 4, 2025
Forecast Valid:
12am EST Dec 5, 2025-6pm EST Dec 11, 2025
 
Forecast Discussion
 
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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