National Weather Service Forecast for: Port Allen LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 6:45 pm CDT Aug 25, 2026
 
Tonight

Tonight: Clear, with a low around 77. Calm wind.
Clear

 Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 97. Heat index values as high as 110. Calm wind becoming northwest around 5 mph.
Sunny then
Slight Chance
T-storms
 Wednesday
Night
Wednesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 4am. Mostly clear, with a low around 78. South wind around 5 mph becoming calm. Chance of precipitation is 30%.
Slight Chance
T-storms then
Chance
Showers
 Thursday

Thursday: Showers and possibly a thunderstorm, mainly before 4pm, then showers and thunderstorms after 4pm. High near 93. Heat index values as high as 105. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 80%.
Showers
Likely then
T-storms
 Thursday
Night
Thursday Night: Showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am, then a chance of showers and thunderstorms after 1am. Low around 76. Southeast wind around 5 mph becoming calm. Chance of precipitation is 80%.
T-storms then
Showers
Likely
 Friday

Friday: A chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny, with a high near 93. Calm wind becoming north around 5 mph. Chance of precipitation is 60%.
Chance
Showers then
T-storms
Likely
 Friday
Night
Friday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 20%.
Slight Chance
T-storms

 Saturday

Saturday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming northeast around 5 mph.
Slight Chance
T-storms

 Saturday
Night
Saturday Night: Mostly clear, with a low around 75. Calm wind.
Mostly Clear
Lo 77 °F Hi 97 °F Lo 78 °F Hi 93 °F Lo 76 °F Hi 93 °F Lo 75 °F Hi 93 °F Lo 75 °F

 

Tonight
 
 Clear, with a low around 77. Calm wind.
Wednesday
 
 A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 97. Heat index values as high as 110. Calm wind becoming northwest around 5 mph.
Wednesday Night
 
 A slight chance of showers and thunderstorms, then a chance of showers after 4am. Mostly clear, with a low around 78. South wind around 5 mph becoming calm. Chance of precipitation is 30%.
Thursday
 
 Showers and possibly a thunderstorm, mainly before 4pm, then showers and thunderstorms after 4pm. High near 93. Heat index values as high as 105. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 80%.
Thursday Night
 
 Showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am, then a chance of showers and thunderstorms after 1am. Low around 76. Southeast wind around 5 mph becoming calm. Chance of precipitation is 80%.
Friday
 
 A chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny, with a high near 93. Calm wind becoming north around 5 mph. Chance of precipitation is 60%.
Friday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 20%.
Saturday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming northeast around 5 mph.
Saturday Night
 
 Mostly clear, with a low around 75. Calm wind.
Sunday
 
 A chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 93. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
 
 Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm.
Monday
 
 A chance of showers and thunderstorms. Sunny, with a high near 92. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.
Tuesday
 
 A chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph.

 

Forecast from NOAA-NWS for Port Allen LA.