National Weather Service Forecast for: Port St. Lucie FL
Issued by: National Weather Service Melbourne, FL
Updated: 1:14 am EST Dec 18, 2025
 
Overnight

Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 64. East southeast wind around 5 mph.
Slight Chance
Showers
 Thursday

Thursday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 82. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Chance
Showers
 Thursday
Night
Thursday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and midnight. Mostly cloudy, with a low around 66. South southeast wind around 5 mph becoming southwest after midnight. Chance of precipitation is 20%.
Slight Chance
T-storms then
Mostly Cloudy
 Friday

Friday: Partly sunny, with a high near 84. Southwest wind 5 to 10 mph becoming west northwest in the afternoon.
Partly Sunny

 Friday
Night
Friday Night: Partly cloudy, with a low around 63. Calm wind becoming north around 5 mph.
Partly Cloudy

 Saturday

Saturday: Mostly sunny, with a high near 80. East wind around 5 mph.
Mostly Sunny

 Saturday
Night
Saturday Night: Partly cloudy, with a low around 63. Calm wind.
Partly Cloudy

 Sunday

Sunday: Mostly sunny, with a high near 80. Calm wind becoming northeast around 5 mph in the afternoon.
Mostly Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 64. Calm wind becoming northeast around 5 mph after midnight.
Partly Cloudy
Lo 64 °F Hi 82 °F Lo 66 °F Hi 84 °F Lo 63 °F Hi 80 °F Lo 63 °F Hi 80 °F Lo 64 °F

 

Overnight
 
 A 20 percent chance of showers. Mostly cloudy, with a low around 64. East southeast wind around 5 mph.
Thursday
 
 A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 82. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
 
 A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and midnight. Mostly cloudy, with a low around 66. South southeast wind around 5 mph becoming southwest after midnight. Chance of precipitation is 20%.
Friday
 
 Partly sunny, with a high near 84. Southwest wind 5 to 10 mph becoming west northwest in the afternoon.
Friday Night
 
 Partly cloudy, with a low around 63. Calm wind becoming north around 5 mph.
Saturday
 
 Mostly sunny, with a high near 80. East wind around 5 mph.
Saturday Night
 
 Partly cloudy, with a low around 63. Calm wind.
Sunday
 
 Mostly sunny, with a high near 80. Calm wind becoming northeast around 5 mph in the afternoon.
Sunday Night
 
 Partly cloudy, with a low around 64. Calm wind becoming northeast around 5 mph after midnight.
Monday
 
 A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 78. East northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
 
 Partly cloudy, with a low around 64. East northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
 
 Mostly sunny, with a high near 76. East wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
 
 Partly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening.
Wednesday
 
 Mostly sunny, with a high near 77. East northeast wind 5 to 10 mph.

 

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