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Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

KF6YUA Sebastopol (AR323)

Lat: 38.38033°NLon: 122.82367°WElev: 235.3ft.

NA

80°F

27°C

Humidity 16%
Wind Speed WSW 0 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 30°F (-1°C)
Visibility NA
Heat Index78°F (26°C)
Last update 18 May 06:54 PM PDT
Extended Forecast for

Graton CA

Coastal Flood Advisory May 18, 07:02pm until May 19, 03:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory May 18, 07:02pm until May 19, 03:00am

    NOW until 3:00am Tue

    Coastal Flood Advisory

  • Tonight

    Low: 52 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 52. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 52 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 85 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49. West southwest wind around 6 mph becoming calm in the evening.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 48.

    Low: 48 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 76.

    High: 76 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Tonight
Clear, with a low around 52. North northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 90. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Increasing clouds, with a low around 52. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 49. West southwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 83.
Thursday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 48.
Friday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 76.
Friday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 48.
Saturday
Areas of fog before 8am. Otherwise, mostly sunny, with a high near 72.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 48.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 72.
Sunday Night
Patchy fog. Otherwise, mostly clear, with a low around 48.
Memorial Day
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Graton CA
 38.42°N 122.87°W (Elev. 118 ft)
Last Update:
1:26 pm PDT May 18, 2026
Forecast Valid:
7pm PDT May 18, 2026-6pm PDT May 25, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation