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

77°F

25°C

Humidity 100%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 16 Jul 2:15 am EDT
Extended Forecast for

Port St. Lucie FL

  • Overnight

    Overnight: A slight chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Mostly clear, with a low around 73. Southeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly between 11am and 5pm. Mostly sunny, with a high near 91. Heat index values as high as 102. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. 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

    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 76. East southeast wind around 5 mph.

    Low: 76 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 11am, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 91. Southeast wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 91 °F

    T-storms
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Sunny, with a high near 92. East southeast wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 92 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.

    High: 92 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. East wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Mostly clear, with a low around 73. Southeast wind around 5 mph. Chance of precipitation is 20%.
Wednesday
Showers and thunderstorms likely, mainly between 11am and 5pm. Mostly sunny, with a high near 91. Heat index values as high as 102. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. 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 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 76. East southeast wind around 5 mph.
Thursday
Showers likely and possibly a thunderstorm before 11am, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 91. Southeast wind 5 to 10 mph. Chance of precipitation is 70%.
Thursday Night
Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Sunny, with a high near 92. East southeast wind 5 to 10 mph. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm in the evening.
Saturday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 74. East wind around 5 mph becoming calm in the evening.
Sunday
A 50 percent chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming east northeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 74. East southeast wind around 5 mph becoming calm.
Monday
Showers and thunderstorms likely. Mostly sunny, with a high near 94. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Mostly sunny, with a high near 93. Calm wind becoming south southeast around 5 mph in the afternoon. 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:
2:14 am EDT Jul 16, 2025
Forecast Valid:
2am EDT Jul 16, 2025-6pm EDT Jul 22, 2025
 
Forecast Discussion
 
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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