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

Mayport Naval Station - Adm David L. McDonald Field (KNRB)

Lat: 30.4°NLon: 81.42°WElev: 13ft.

Fair

80°F

27°C

Humidity 82%
Wind Speed W 13 mph
Barometer 29.92 in (1013.2 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 19 Aug 3:52 am EDT
Extended Forecast for

Mayport Naval Station FL

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

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 111. West wind 9 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 78. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 78 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A 10 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 93. Heat index values as high as 107. West wind 5 to 9 mph becoming southeast in the afternoon.

    High: 93 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 78. Southwest wind 6 to 8 mph.

    Low: 78 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Southwest wind 5 to 10 mph becoming southeast in the afternoon.

    High: 93 °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. Chance of precipitation is 30%.

    Low: 77 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 60%.

    High: 92 °F

    Mostly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 76. Chance of precipitation is 60%.

    Low: 76 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 111. West wind 9 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 78. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.
Thursday
A 10 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 93. Heat index values as high as 107. West wind 5 to 9 mph becoming southeast in the afternoon.
Thursday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 78. Southwest wind 6 to 8 mph.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Southwest wind 5 to 10 mph becoming southeast in the afternoon.
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. Chance of precipitation is 30%.
Saturday
Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 76. Chance of precipitation is 60%.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Monday Night
A 30 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 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mayport Naval Station FL
 30.39°N 81.43°W
Last Update:
3:06 am EDT Aug 19, 2026
Forecast Valid:
4am EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation