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

Witham Field Airport (KSUA)

Lat: 27.18°NLon: 80.23°WElev: 13ft.

A Few Clouds

82°F

28°C

Humidity 89%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 79°F (26°C)
Visibility 7.00 mi
Heat Index91°F (33°C)
Last update 1 Sep 7:48 pm EDT
Extended Forecast for

Port St. Lucie FL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 2am, then a chance of showers after 4am. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm. Chance of precipitation is 40%.

    Low: 76 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 91. Light east wind becoming east southeast 5 to 10 mph in the afternoon. Chance of precipitation is 80%.

    High: 91 °F

    Showers
    Likely then
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms after 8pm. Low around 76. East southeast wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 76 °F

    T-storms then
    Slight Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 91. Light southeast wind becoming east southeast 5 to 10 mph in the morning. Chance of precipitation is 80%.

    High: 91 °F

    Showers
    Likely then
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Low around 75. Calm wind. Chance of precipitation is 80%.

    Low: 75 °F

    T-storms then
    Slight Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms, mainly after 2pm. High near 91. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 80%.

    High: 91 °F

    Chance
    T-storms then
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms, mainly before 8pm. Low around 74. Calm wind. Chance of precipitation is 80%.

    Low: 74 °F

    T-storms then
    Slight Chance
    T-storms

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 74. Calm wind.
Wednesday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 2am, then a chance of showers after 4am. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 91. Light east wind becoming east southeast 5 to 10 mph in the afternoon. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms after 8pm. Low around 76. East southeast wind around 5 mph becoming calm. Chance of precipitation is 80%.
Friday
Showers and possibly a thunderstorm. High near 91. Light southeast wind becoming east southeast 5 to 10 mph in the morning. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Low around 75. Calm wind. Chance of precipitation is 80%.
Saturday
Showers and thunderstorms, mainly after 2pm. High near 91. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 80%.
Saturday Night
Showers and thunderstorms, mainly before 8pm. Low around 74. Calm wind. Chance of precipitation is 80%.
Sunday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 92. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 60%.
Labor Day
Showers and thunderstorms. High near 91. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 80%.
Monday Night
Showers and thunderstorms. Low around 74. Calm wind. Chance of precipitation is 80%.
Tuesday
Showers and thunderstorms likely. Mostly sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Port St. Lucie FL
 27.29°N 80.36°W (Elev. 13 ft)
Last Update:
7:29 pm EDT Sep 1, 2026
Forecast Valid:
7pm EDT Sep 1, 2026-6pm EDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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