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.

Partly Cloudy

22°C

72°F

Humidity 76%
Wind Speed S 13 km/h
Barometer 1024.9 mb (30.27 in)
Dewpoint 18°C (64°F)
Visibility 16 km
Last update 18 Jun 8:56 pm EDT
Extended Forecast for

Stony Brook NY

  • Tonight

    Tonight: Partly cloudy, with a low around 19. Southwest wind 13 to 16 km/h, with gusts as high as 32 km/h.

    Low: 19 °C

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 31. South wind 13 to 16 km/h.

    High: 31 °C

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 19. South wind 13 to 18 km/h.

    Low: 19 °C

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 32. Southwest wind 14 to 18 km/h.

    High: 32 °C

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 21. South wind 13 to 18 km/h.

    Low: 21 °C

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 30.

    High: 30 °C

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 19.

    Low: 19 °C

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 28.

    High: 28 °C

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 20.

    Low: 20 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 19. Southwest wind 13 to 16 km/h, with gusts as high as 32 km/h.
Juneteenth
Mostly sunny, with a high near 31. South wind 13 to 16 km/h.
Wednesday Night
Partly cloudy, with a low around 19. South wind 13 to 18 km/h.
Thursday
Mostly sunny, with a high near 32. Southwest wind 14 to 18 km/h.
Thursday Night
Partly cloudy, with a low around 21. South wind 13 to 18 km/h.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 30.
Friday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 19.
Saturday
A 30 percent chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 28.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 20.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 30.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 21.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 30.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 19.
Tuesday
Sunny, with a high near 29.
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Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 m)
Last Update:
7:23 pm EDT Jun 18, 2024
Forecast Valid:
9pm EDT Jun 18, 2024-6pm EDT Jun 25, 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