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

Extreme Heat Risk this Week

Extreme heat and little overnight relief will lead to an extreme risk for heat-related impacts through the rest of the week. Extreme Heat Warning in effect on Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

Palatka Kay Larkin Field (K28J)

Lat: 29.66°NLon: 81.69°WElev: 48ft.

Fair

73°F

23°C

Humidity 100%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 19 Aug 6:15 am EDT
Extended Forecast for

San Mateo FL

Heat Advisory August 19, 11:00am until August 19, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Showers and thunderstorms likely, mainly after 5pm. Increasing clouds and hot, with a high near 95. Heat index values as high as 110. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 95 °F

    Sunny then
    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 76 °F

    T-storms
    Likely then
    Partly Cloudy

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 4pm. Increasing clouds and hot, with a high near 97. Heat index values as high as 110. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 97 °F

    Mostly Sunny
    then T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 75. Calm wind. Chance of precipitation is 60%.

    Low: 75 °F

    T-storms
    Likely then
    Mostly Clear

  • Friday

    Friday: Showers and thunderstorms likely after 2pm. Mostly sunny and hot, with a high near 96. Light south wind. Chance of precipitation is 60%.

    High: 96 °F

    Sunny then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 74. Chance of precipitation is 60%.

    Low: 74 °F

    T-storms
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.

    High: 94 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 93. Chance of precipitation is 60%.

    High: 93 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 5pm. Increasing clouds and hot, with a high near 95. Heat index values as high as 110. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers and thunderstorms likely, mainly after 4pm. Increasing clouds and hot, with a high near 97. Heat index values as high as 110. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 75. Calm wind. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely after 2pm. Mostly sunny and hot, with a high near 96. Light south wind. Chance of precipitation is 60%.
Friday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 74. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.
Saturday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73.
Sunday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 93. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 60%.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo FL
 29.6°N 81.57°W
Last Update:
6:01 am EDT Aug 19, 2026
Forecast Valid:
6am EDT Aug 19, 2026-6pm EDT Aug 25, 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