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.

Mostly Cloudy

69°F

21°C

Humidity 84%
Wind Speed SW 5 mph
Barometer 30.31 in (1026.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 16 Sep 8:56 pm EDT
Extended Forecast for

Mastic Beach NY

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 66. Southwest wind 5 to 7 mph.

    Low: 66 °F

    Patchy Fog

  • Thursday

    Thursday: Mostly sunny, with a high near 76. Southwest wind 5 to 11 mph.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly between 11pm and 5am. Increasing clouds, with a low around 68. Southwest wind 11 to 14 mph.

    Low: 68 °F

    Chance
    Showers

  • Friday

    Friday: Partly sunny through mid morning, then becoming sunny, with a high near 78. North wind 9 to 13 mph.

    High: 78 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. Northeast wind 9 to 13 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 59 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

Detailed Forecast

Tonight
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 66. Southwest wind 5 to 7 mph.
Thursday
Mostly sunny, with a high near 76. Southwest wind 5 to 11 mph.
Thursday Night
A 30 percent chance of showers, mainly between 11pm and 5am. Increasing clouds, with a low around 68. Southwest wind 11 to 14 mph.
Friday
Partly sunny through mid morning, then becoming sunny, with a high near 78. North wind 9 to 13 mph.
Friday Night
Partly cloudy, with a low around 58. Northeast wind 9 to 13 mph.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 59.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
Sunday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Monday
A 30 percent chance of showers. Mostly cloudy, with a high near 69.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 58.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 68. Breezy.
Tuesday Night
Mostly cloudy, with a low around 58.
Wednesday
Partly sunny, with a high near 68. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mastic Beach NY
 40.77°N 72.83°W (Elev. 13 ft)
Last Update:
3:19 pm EDT Sep 16, 2026
Forecast Valid:
9pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026
 
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