Fire Weather Conditions in the Northwest U.S.; Heavy Rain in the West and South-central U.S.

Extreme heat is waning over the Pacific Northwest. Dry, gusty winds, and isolated dry thunderstorms will bring critical fire weather to the Pacific Northwest and Intermountain West. Heavy rain and thunderstorms continue across portions of the Great Basin, Rockies, and central/southern Plains into the Ozarks. An atmospheric river will bring heavy rain and strong winds to southwest Alaska. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

69°F

21°C

Humidity 70%
Wind Speed SW 3 mph
Barometer 30.01 in (1016.3 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 26 Aug 9:56 pm EDT
Extended Forecast for

Stony Brook NY

  • Tonight

    Tonight: Partly cloudy, with a low around 60. North wind around 6 mph.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 77. North wind around 7 mph becoming west in the afternoon.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. Northwest wind 5 to 7 mph.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 2am.  Partly cloudy, with a low around 65. Southwest wind around 10 mph.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers after 8am.  Partly sunny, with a high near 78.

    High: 78 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 2am.  Partly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 60. North wind around 6 mph.
Wednesday
Sunny, with a high near 77. North wind around 7 mph becoming west in the afternoon.
Wednesday Night
Mostly clear, with a low around 60. Northwest wind 5 to 7 mph.
Thursday
Mostly sunny, with a high near 78. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 65. Southwest wind around 10 mph.
Friday
A 50 percent chance of showers after 8am. Partly sunny, with a high near 78.
Friday Night
A 30 percent chance of showers before 2am. Partly cloudy, with a low around 59.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 61.
Labor Day
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
7:17 pm EDT Aug 26, 2025
10pm EDT Aug 26, 2025-6pm EDT Sep 2, 2025
 
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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