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

Hazardous Weather Conditions

Current conditions at

Titusville (KTIX)

Lat: 28.52°NLon: 80.8°WElev: 36ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Port St. John FL

Heat Advisory August 20, 10:00am until August 20, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Partly cloudy, with a low around 77. West southwest wind around 5 mph becoming calm.

    Low: 77 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 110. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 76. South wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 109. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 94 °F

    Mostly Sunny
    then T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 76. South southwest wind around 5 mph. Chance of precipitation is 60%.

    Low: 76 °F

    T-storms
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 94. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 94 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. South southwest wind around 5 mph.

    Low: 76 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. Southwest wind around 5 mph.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. South southwest wind around 5 mph.

    Low: 76 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 77. West southwest wind around 5 mph becoming calm.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 110. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 76. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Friday
Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 109. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 76. South southwest wind around 5 mph. Chance of precipitation is 60%.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 94. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. South southwest wind around 5 mph.
Sunday
A 50 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. Southwest wind around 5 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. South southwest wind around 5 mph.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. South southwest wind around 5 mph becoming southeast in the afternoon.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. South wind around 5 mph.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. Southeast wind around 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind becoming south southeast around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port St. John FL
 28.5°N 80.78°W (Elev. 23 ft)
Last Update:
1:39 am EDT Aug 20, 2026
Forecast Valid:
2am EDT Aug 20, 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