National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Shirley, Brookhaven Airport (KHWV)

Lat: 40.82°NLon: 72.87°WElev: 82ft.

Fair

81°F

27°C

Humidity 77%
Wind Speed S 8 mph
Barometer 30.05 in (1017.3 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 15 Jul 5:56 pm EDT
Extended Forecast for

Mastic NY

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, increasing clouds, with a low around 72. South wind around 6 mph becoming calm in the evening.

    Low: 72 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86. Heat index values as high as 96. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 74. Southwest wind around 7 mph.

    Low: 74 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Southwest wind 7 to 13 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 76. Southwest wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 76 °F

    Showers
    Likely then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 72. South wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 86. Heat index values as high as 96. Calm wind becoming south 5 to 8 mph in the afternoon.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 74. Southwest wind around 7 mph.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Southwest wind 7 to 13 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 76. Southwest wind 6 to 8 mph. Chance of precipitation is 60%.
Friday
Sunny, with a high near 88.
Friday Night
Partly cloudy, with a low around 69.
Saturday
Sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
A 40 percent chance of showers after 8am. Partly sunny, with a high near 84.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 71.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mastic NY
 40.82°N 72.85°W (Elev. 49 ft)
Last Update:
3:16 pm EDT Jul 15, 2025
Forecast Valid:
6pm EDT Jul 15, 2025-6pm EDT Jul 22, 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