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

71°F

22°C

Humidity 66%
Wind Speed S 8 mph
Barometer 30.22 in (1023.2 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 4 Oct 11:56 am EDT
Extended Forecast for

Stony Brook NY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 72. South wind around 7 mph.

    High: 72 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 60. South wind 3 to 5 mph.

    Low: 60 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 74. North wind 5 to 9 mph.

    High: 74 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Clear, with a low around 54. North wind around 7 mph.

    Low: 54 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 69. Northeast wind around 6 mph becoming east in the afternoon.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Showers likely after 2am. Increasing clouds, with a low around 57. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Mostly Cloudy
    then Showers
    Likely

  • Monday

    Monday: Showers likely, mainly before 8am. Partly sunny, with a high near 70. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 72. South wind around 7 mph.
Tonight
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 60. South wind 3 to 5 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 74. North wind 5 to 9 mph.
Saturday Night
Clear, with a low around 54. North wind around 7 mph.
Sunday
Sunny, with a high near 69. Northeast wind around 6 mph becoming east in the afternoon.
Sunday Night
Showers likely after 2am. Increasing clouds, with a low around 57. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, mainly before 8am. Partly sunny, with a high near 70. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
Sunny, with a high near 67.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 64.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 ft)
Last Update:
10:20 am EDT Oct 4, 2024
Forecast Valid:
12pm EDT Oct 4, 2024-6pm EDT Oct 10, 2024
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation