National Weather Service Forecast for: Port St. Lucie FL
Issued by: National Weather Service Melbourne, FL
Updated: 2:39 am EDT Jun 22, 2026
 
Today

Today: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 93. Heat index values as high as 103. Light south southwest wind becoming east southeast 5 to 10 mph in the afternoon.
Sunny then
Slight Chance
T-storms
 Tonight

Tonight: Partly cloudy, with a low around 76. South southeast wind around 5 mph becoming calm in the evening.
Partly Cloudy

 Tuesday

Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming south southeast around 5 mph in the morning.
Mostly Sunny
then Chance
T-storms
 Tuesday
Night
Tuesday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. South wind around 5 mph.
Slight Chance
T-storms
 Wednesday

Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 40%.
Chance
T-storms
 Wednesday
Night
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.
Chance
T-storms
 Thursday

Thursday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Southeast wind 5 to 10 mph.
Mostly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.
Chance
T-storms
 Friday

Friday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. Light south wind becoming east southeast 5 to 10 mph in the afternoon.
Sunny then
Chance
T-storms
Hi 93 °F Lo 76 °F Hi 93 °F Lo 76 °F Hi 93 °F Lo 76 °F Hi 92 °F Lo 76 °F Hi 93 °F

 

Today
 
 A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 93. Heat index values as high as 103. Light south southwest wind becoming east southeast 5 to 10 mph in the afternoon.
Tonight
 
 Partly cloudy, with a low around 76. South southeast wind around 5 mph becoming calm in the evening.
Tuesday
 
 A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming south southeast around 5 mph in the morning.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. South wind around 5 mph.
Wednesday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 40%.
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.
Thursday
 
 A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Southeast wind 5 to 10 mph.
Thursday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.
Friday
 
 A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. Light south wind becoming east southeast 5 to 10 mph in the afternoon.
Friday Night
 
 A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Southeast wind around 5 mph becoming calm in the evening.
Saturday
 
 A 40 percent chance of showers and thunderstorms. Sunny, with a high near 94. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm.
Sunday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming east around 5 mph in the afternoon.

 

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