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.

Partly Cloudy

79°F

26°C

Humidity 100%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 2 Sep 5:55 am EDT
Extended Forecast for

Port St. Lucie-River Park FL

  • Today

    Today: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Heat index values as high as 102. Light and variable wind becoming east 5 to 10 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: 90 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm.

    Low: 76 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 89. Light south southeast wind becoming east southeast 5 to 10 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm after midnight.

    Low: 76 °F

    Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 90. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 70%.

    High: 90 °F

    T-storms
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 75. Calm wind. Chance of precipitation is 60%.

    Low: 75 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%.

    High: 90 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 60%.

    Low: 74 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms, mainly after 2pm. High near 90. Calm wind becoming west southwest around 5 mph. Chance of precipitation is 80%.

    High: 90 °F

    Chance
    T-storms then
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Heat index values as high as 102. Light and variable wind becoming east 5 to 10 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.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm.
Thursday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 89. Light south southeast wind becoming east southeast 5 to 10 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm after midnight.
Friday
Showers and thunderstorms likely, mainly between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 90. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 75. Calm wind. Chance of precipitation is 60%.
Saturday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Saturday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 60%.
Sunday
Showers and thunderstorms, mainly after 2pm. High near 90. Calm wind becoming west southwest around 5 mph. Chance of precipitation is 80%.
Sunday Night
Showers and thunderstorms, mainly before 8pm. Low around 74. Calm wind. Chance of precipitation is 80%.
Labor Day
Showers and thunderstorms. High near 90. Calm wind becoming southwest 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 89. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Port St. Lucie-River Park FL
 27.31°N 80.36°W (Elev. 10 ft)
Last Update:
2:39 am EDT Sep 2, 2026
Forecast Valid:
6am EDT Sep 2, 2026-6pm EDT Sep 8, 2026
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation