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.

Fair

77°F

25°C

Humidity 82%
Wind Speed SW 9 mph
Barometer 29.85 in (1010.7 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 15 Jul 2:56 am EDT
Extended Forecast for

Mastic NYSimilar City Names

Heat Advisory July 15, 11:00am until July 15, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Clear, with a low around 76. West wind around 9 mph.

    Low: 76 °F

    Clear

  • Wednesday

    Wednesday: Patchy smoke after noon. Sunny, with a high near 94. Heat index values as high as 100. West wind around 10 mph.

    High: 94 °F

    Sunny then
    Patchy Smoke

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 2am. Areas of smoke. Mostly cloudy, with a low around 73. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 73 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Patchy smoke. Mostly sunny, with a high near 88. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 88 °F

    Patchy Smoke

  • Thursday Night

    Thursday Night: Areas of smoke. Partly cloudy, with a low around 71. Northwest wind 3 to 7 mph.

    Low: 71 °F

    Areas Smoke

  • Friday

    Friday: Patchy smoke before 8am. Mostly sunny, with a high near 85.

    High: 85 °F

    Patchy Smoke
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 71. Chance of precipitation is 80%.

    Low: 71 °F

    Showers

Detailed Forecast

Overnight
Clear, with a low around 76. West wind around 9 mph.
Wednesday
Patchy smoke after noon. Sunny, with a high near 94. Heat index values as high as 100. West wind around 10 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 2am. Areas of smoke. Mostly cloudy, with a low around 73. Northwest wind 5 to 7 mph becoming calm after midnight.
Thursday
Patchy smoke. Mostly sunny, with a high near 88. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Areas of smoke. Partly cloudy, with a low around 71. Northwest wind 3 to 7 mph.
Friday
Patchy smoke before 8am. Mostly sunny, with a high near 85.
Friday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 70.
Saturday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
Saturday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 71. Chance of precipitation is 80%.
Sunday
A 30 percent chance of showers before 8am. Partly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mastic NYSimilar City Names
 40.8°N 72.85°W (Elev. 39 ft)
Last Update:
2:28 am EDT Jul 15, 2026
Forecast Valid:
3am EDT Jul 15, 2026-6pm EDT Jul 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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