National Weather Service Forecast for: Port St. Lucie FL
Issued by: National Weather Service Melbourne, FL
Updated: 7:29 am EDT Jun 30, 2026
 
Today

Today: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming northeast around 5 mph in the afternoon.
Mostly Sunny
then Chance
T-storms
 Tonight

Tonight: A chance of showers and thunderstorms, mainly before 1am, then a slight chance of thunderstorms after 4am. Partly cloudy, with a low around 76. Northeast wind around 5 mph becoming calm. Chance of precipitation is 30%.
Chance
T-storms

 Wednesday

Wednesday: Showers and thunderstorms likely, mainly between 3pm and 4pm. Mostly sunny, with a high near 90. Light north northeast wind becoming northeast 5 to 10 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely

 Wednesday
Night
Wednesday 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. Northeast wind around 5 mph becoming calm. Chance of precipitation is 30%.
Chance
T-storms then
Slight Chance
Showers
 Thursday

Thursday: A chance of showers, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 70%.
Chance
T-storms then
T-storms
Likely
 Thursday
Night
Thursday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 75. East southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.
T-storms
Likely then
Slight Chance
T-storms
 Friday

Friday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 92. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Chance
T-storms then
T-storms
Likely
 Friday
Night
Friday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.
T-storms
Likely then
Slight Chance
T-storms
 Independence
Day
Independence Day: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 92. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Slight Chance
T-storms then
T-storms
Likely
Hi 93 °F Lo 76 °F Hi 90 °F Lo 75 °F Hi 91 °F Lo 75 °F Hi 92 °F Lo 76 °F Hi 92 °F

 

Today
 
 A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming northeast around 5 mph in the afternoon.
Tonight
 
 A chance of showers and thunderstorms, mainly before 1am, then a slight chance of thunderstorms after 4am. Partly cloudy, with a low around 76. Northeast wind around 5 mph becoming calm. Chance of precipitation is 30%.
Wednesday
 
 Showers and thunderstorms likely, mainly between 3pm and 4pm. Mostly sunny, with a high near 90. Light north northeast wind becoming northeast 5 to 10 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday 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. Northeast wind around 5 mph becoming calm. Chance of precipitation is 30%.
Thursday
 
 A chance of showers, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 91. Calm wind becoming east 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 75. East southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.
Friday
 
 Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 92. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Friday Night
 
 Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.
Independence Day
 
 Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 92. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Saturday Night
 
 Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 75. South southeast wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 92. Light south wind becoming southeast 5 to 10 mph in the afternoon. Chance of precipitation is 70%.
Sunday Night
 
 Showers and thunderstorms likely. Partly cloudy, with a low around 76. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Monday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Port St. Lucie FL.