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.

Freezing Fog

31°F

-1°C

Humidity 96%
Wind Speed Calm
Barometer 30.02 in (1016.6 mb)
Dewpoint 30°F (-1°C)
Visibility 0.50 mi
Last update 18 Feb 3:56 am EST
Extended Forecast for

Mastic NY

Dense Fog Advisory February 18, 04:41am until February 18, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory February 18, 04:41am until February 18, 10:00am

    NOW until 10:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 31 °F

    Slight Chance
    Rain/Snow and
    Dense Fog

  • Wednesday

    Wednesday: A slight chance of snow before 7am, then rain. Widespread dense fog, mainly before 10am. High near 43. Light and variable wind. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 43 °F

    Rain/Snow and
    Dense Fog
    then Rain and
    Areas Fog

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before 10pm. Areas of fog before 4am. Otherwise, cloudy, with a low around 29. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 29 °F

    Rain Likely
    and Areas Fog

  • Thursday

    Thursday: Mostly cloudy, with a high near 42. Wind chill values between 25 and 35. Northeast wind 5 to 7 mph becoming east in the afternoon.

    High: 42 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of rain before 1am, then a chance of snow. Mostly cloudy, with a low around 30. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 50%.

    Low: 30 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Friday

    Friday: Rain. High near 41. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 41 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain before 1am. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

Overnight
A slight chance of rain before 5am, then a slight chance of snow. Widespread dense fog. Otherwise, cloudy, with a low around 31. Calm wind. Chance of precipitation is 20%.
Wednesday
A slight chance of snow before 7am, then rain. Widespread dense fog, mainly before 10am. High near 43. Light and variable wind. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain likely, mainly before 10pm. Areas of fog before 4am. Otherwise, cloudy, with a low around 29. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly cloudy, with a high near 42. Wind chill values between 25 and 35. Northeast wind 5 to 7 mph becoming east in the afternoon.
Thursday Night
A chance of rain before 1am, then a chance of snow. Mostly cloudy, with a low around 30. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 50%.
Friday
Rain. High near 41. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 50 percent chance of rain before 1am. Mostly cloudy, with a low around 31.
Saturday
Partly sunny, with a high near 43.
Saturday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 28.
Sunday
A 50 percent chance of snow. Cloudy, with a high near 36.
Sunday Night
Snow likely. Cloudy, with a low around 26. Chance of precipitation is 60%.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 35.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 31.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mastic NY
 40.82°N 72.85°W (Elev. 49 ft)
Last Update:
1:31 am EST Feb 18, 2026
Forecast Valid:
4am EST Feb 18, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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