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

Northeast Florida Regional Airport (KSGJ)

Lat: 29.96°NLon: 81.34°WElev: 3ft.

Partly Cloudy

91°F

33°C

Humidity 57%
Wind Speed SW 7 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 19 Aug 5:56 pm EDT
Extended Forecast for

Saint Augustine Beach FL

Heat Advisory August 20, 11:00am until August 20, 07:00pm
Heat Advisory August 19, 06:33pm until August 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
...
  •  
    Heat Advisory August 19, 06:33pm until August 19, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Tonight

    Low: 78 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly between 2pm and 5pm. Mostly sunny, with a high near 91. Heat index values as high as 106. West wind 5 to 10 mph becoming east in the afternoon.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms between 7pm and 10pm. Partly cloudy, with a low around 77. South wind 7 to 11 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 90. Heat index values as high as 102. Southwest wind 5 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 16 mph.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 77. Southwest wind 7 to 11 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.

    High: 89 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 78. South wind 6 to 9 mph becoming southwest in the evening.
Thursday
A 30 percent chance of showers and thunderstorms, mainly between 2pm and 5pm. Mostly sunny, with a high near 91. Heat index values as high as 106. West wind 5 to 10 mph becoming east in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms between 7pm and 10pm. Partly cloudy, with a low around 77. South wind 7 to 11 mph. Chance of precipitation is 20%.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 90. Heat index values as high as 102. Southwest wind 5 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 16 mph.
Friday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 77. Southwest wind 7 to 11 mph. Chance of precipitation is 30%.
Saturday
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 76.
Sunday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 76. Chance of precipitation is 60%.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Augustine Beach FL
 29.85°N 81.25°W
Last Update:
2:21 pm EDT Aug 19, 2026
Forecast Valid:
6pm EDT Aug 19, 2026-6pm EDT Aug 26, 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