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

Hazardous Weather Conditions

Current conditions at

Shirley, Brookhaven Airport (KHWV)

Lat: 40.82°NLon: 72.87°WElev: 82ft.

Mostly Cloudy

58°F

14°C

Humidity 84%
Wind Speed Calm
Barometer 30.12 in (1020.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 20 Aug 2:56 am EDT
Extended Forecast for

Mastic Beach NY

Coastal Flood Watch August 21, 06:00pm until August 22, 12:00am
High Surf Advisory August 20, 06:00am until August 22, 08:00pm
Click here for hazard details and duration
Coastal Flood Watch
High Surf Advisory

  • Today

    Today: Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 71. East wind 11 to 16 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 11pm, then showers likely. Steady temperature around 68. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Showers and
    Breezy

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 11am. Mostly cloudy, with a high near 71. Breezy, with a northeast wind 22 to 24 mph, with gusts as high as 37 mph.

    High: 71 °F

    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62. Breezy, with a north wind around 25 mph, with gusts as high as 37 mph.

    Low: 62 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 77. Breezy, with a north wind 14 to 23 mph, with gusts as high as 34 mph.

    High: 77 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

Today
Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 71. East wind 11 to 16 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 11pm, then showers likely. Steady temperature around 68. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
A 30 percent chance of showers, mainly before 11am. Mostly cloudy, with a high near 71. Breezy, with a northeast wind 22 to 24 mph, with gusts as high as 37 mph.
Thursday Night
Mostly cloudy, with a low around 62. Breezy, with a north wind around 25 mph, with gusts as high as 37 mph.
Friday
Mostly sunny, with a high near 77. Breezy, with a north wind 14 to 23 mph, with gusts as high as 34 mph.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 68.
Monday
A 50 percent chance of showers. Partly sunny, with a high near 76.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 65.
Tuesday
Sunny, with a high near 75.
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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:
2:48 am EDT Aug 20, 2025
Forecast Valid:
4am EDT Aug 20, 2025-6pm EDT Aug 26, 2025
 
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