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.

Fair

81°F

27°C

Humidity 89%
Wind Speed SW 5 mph
Barometer 29.99 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 31 Jul 3:55 am EDT
Extended Forecast for

Port St. Lucie FL

  • Today

    Today: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 74. West southwest wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    T-storms
    Likely then
    Mostly Cloudy

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 3pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Mostly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly between 7pm and 8pm. Mostly cloudy, with a low around 73. South wind around 5 mph becoming calm. Chance of precipitation is 60%.

    Low: 73 °F

    T-storms
    Likely then
    Mostly Cloudy

  • Sunday

    Sunday: Showers and possibly a thunderstorm after 2pm. High near 92. South southwest wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 92 °F

    Mostly Sunny
    then T-storms

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 74. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 74 °F

    T-storms then
    Chance
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm after 2pm. High near 92. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 80%.

    High: 92 °F

    Mostly Sunny
    then T-storms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Low around 74. South wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 74 °F

    T-storms then
    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 91. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 70%.

    High: 91 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

Detailed Forecast

Today
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 74. West southwest wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and thunderstorms likely, mainly after 3pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely, mainly between 7pm and 8pm. Mostly cloudy, with a low around 73. South wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
Showers and possibly a thunderstorm after 2pm. High near 92. South southwest wind 5 to 10 mph. 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 74. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Monday
Showers and possibly a thunderstorm after 2pm. High near 92. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Low around 74. South wind around 5 mph becoming calm. Chance of precipitation is 80%.
Tuesday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 91. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Tuesday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Mostly sunny, with a high near 91. Light east wind increasing to 5 to 10 mph in the afternoon. Chance of precipitation is 60%.
Wednesday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms likely. Mostly sunny, with a high near 91. Light east wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Port St. Lucie FL
 27.27°N 80.36°W (Elev. 16 ft)
Last Update:
2:39 am EDT Jul 31, 2026
Forecast Valid:
4am EDT Jul 31, 2026-6pm EDT Aug 6, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation