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

Hazardous Weather Conditions

Current conditions at

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

Lat: 30.4°NLon: 81.42°WElev: 13ft.

Mostly Cloudy

81°F

27°C

Humidity 88%
Wind Speed SW 8 mph
Barometer 30.04 in (1017.3 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 14 Aug 11:52 pm EDT
Extended Forecast for

Jacksonville Beach FL

Heat Advisory August 15, 11:00am until August 15, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Partly cloudy, with a low around 80. West wind around 9 mph.

    Low: 80 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny, with a high near 88. Heat index values as high as 101. West wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

    High: 88 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 80. South wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.

    Low: 80 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, then showers and thunderstorms likely after 11am. Sunny, with a high near 87. Heat index values as high as 100. West wind 6 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

    High: 87 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 79. Northeast wind 7 to 9 mph. Chance of precipitation is 60%.

    Low: 79 °F

    T-storms
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 84. Breezy. Chance of precipitation is 80%.

    High: 84 °F

    Showers
    Likely then
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 80. Chance of precipitation is 80%.

    Low: 80 °F

    T-storms then
    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 8am. Sunny, with a high near 84. Breezy.

    High: 84 °F

    Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 80.

    Low: 80 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 80. West wind around 9 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny, with a high near 88. Heat index values as high as 101. West wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 80. South wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.
Saturday
A chance of showers, then showers and thunderstorms likely after 11am. Sunny, with a high near 87. Heat index values as high as 100. West wind 6 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 79. Northeast wind 7 to 9 mph. Chance of precipitation is 60%.
Sunday
Showers and possibly a thunderstorm. High near 84. Breezy. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 80. Chance of precipitation is 80%.
Monday
A 50 percent chance of showers and thunderstorms after 8am. Sunny, with a high near 84. Breezy.
Monday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 80.
Tuesday
A 40 percent chance of showers and thunderstorms after 8am. Sunny, with a high near 84. Windy.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 80. Breezy.
Wednesday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 84. Breezy.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 79.
Thursday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Jacksonville Beach FL
 30.3°N 81.39°W
Last Update:
11:21 pm EDT Aug 14, 2025
Forecast Valid:
12am EDT Aug 15, 2025-6pm EDT Aug 21, 2025
 
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