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

82°F

28°C

Humidity 79%
Wind Speed W 3 mph
Barometer 30.05 in
Dewpoint 75°F (24°C)
Visibility 7.00 mi
Heat Index89°F (32°C)
Last update 20 Jun 8:47 am EDT
Extended Forecast for

Port St. Lucie FL

  • Today

    Today: Showers and thunderstorms likely, mainly after 4pm. Partly sunny, with a high near 92. Heat index values as high as 102. West wind around 5 mph becoming east southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 92 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    T-storms
    Likely then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the morning.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 75. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Southeast wind around 5 mph.

    Low: 77 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

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

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 4pm. Partly sunny, with a high near 92. Heat index values as high as 102. West wind around 5 mph becoming east southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the morning.
Sunday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 75. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Southeast wind around 5 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. 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 before 8pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. South southeast wind around 5 mph becoming calm in the evening.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. Light south southwest wind becoming south southeast 5 to 10 mph in the afternoon.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. South wind around 5 mph becoming calm in the evening.
Friday
A 50 percent chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Port St. Lucie FL
 27.29°N 80.36°W (Elev. 13 ft)
Last Update:
8:56 am EDT Jun 20, 2026
Forecast Valid:
9am EDT Jun 20, 2026-6pm EDT Jun 26, 2026
 
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Additional Resources

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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