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

79°F

26°C

Humidity 89%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 29 Jun 3:15 am EDT
Extended Forecast for

Port St. Lucie FL

  • Overnight

    Overnight: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming east around 5 mph in the afternoon.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Showers and thunderstorms likely between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 94. Heat index values as high as 103. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 70%.

    High: 94 °F

    Sunny then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Calm wind.

    Low: 76 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 91. Light northeast wind becoming east northeast 5 to 10 mph in the afternoon. Chance of precipitation is 80%.

    High: 91 °F

    Chance
    T-storms then
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Low around 76. East wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 76 °F

    T-storms then
    Slight Chance
    T-storms

  • Thursday

    Thursday: 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

    Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 77. Southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.

    Low: 77 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 75. Calm wind.
Monday
Sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm in the evening.
Tuesday
Showers and thunderstorms likely between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 94. Heat index values as high as 103. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Calm wind.
Wednesday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 91. Light northeast wind becoming east northeast 5 to 10 mph in the afternoon. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Low around 76. East wind around 5 mph becoming calm. Chance of precipitation is 80%.
Thursday
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%.
Thursday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 77. Southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.
Friday
Showers and thunderstorms, mainly after 2pm. High near 92. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 80%.
Friday Night
Showers and thunderstorms. Low around 77. Southeast wind around 5 mph becoming calm. Chance of precipitation is 80%.
Independence Day
Showers and thunderstorms likely. Mostly sunny, with a high near 92. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Saturday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 76. South southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
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 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Port St. Lucie FL
 27.27°N 80.34°W (Elev. 7 ft)
Last Update:
2:39 am EDT Jun 29, 2026
Forecast Valid:
3am EDT Jun 29, 2026-6pm EDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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