National Weather Service Forecast for: Port Allen LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 11:15 am CDT Jul 10, 2026
 
This
Afternoon
This Afternoon: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a steady temperature around 92. Heat index values as high as 107. South wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms

 Tonight

Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 77. South wind around 5 mph becoming calm.
Slight Chance
T-storms then
Mostly Clear
 Saturday

Saturday: A 50 percent chance of showers and thunderstorms after 1pm. Increasing clouds and hot, with a high near 95. Heat index values as high as 107. Calm wind becoming south around 5 mph in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunny then
Chance
T-storms
 Saturday
Night
Saturday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers after 5am. Mostly clear, with a low around 77. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Slight Chance
T-storms then
Slight Chance
Showers
 Sunday

Sunday: A chance of showers and thunderstorms before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 91. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%.
Chance
T-storms then
T-storms
 Sunday
Night
Sunday Night: Showers and thunderstorms, mainly before 7pm. Low around 76. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.
T-storms then
Chance
Showers
 Monday

Monday: Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms after 1pm. High near 86. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%.
Showers then
T-storms

 Monday
Night
Monday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm.
Chance
T-storms

 Tuesday

Tuesday: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly cloudy, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.
Showers
Likely then
T-storms
Likely
Hi 92 °F Lo 77 °F Hi 95 °F Lo 77 °F Hi 91 °F Lo 76 °F Hi 86 °F Lo 73 °F Hi 85 °F

 

This Afternoon
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a steady temperature around 92. Heat index values as high as 107. South wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 77. South wind around 5 mph becoming calm.
Saturday
 
 A 50 percent chance of showers and thunderstorms after 1pm. Increasing clouds and hot, with a high near 95. Heat index values as high as 107. Calm wind becoming south around 5 mph in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers after 5am. Mostly clear, with a low around 77. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Sunday
 
 A chance of showers and thunderstorms before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 91. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%.
Sunday Night
 
 Showers and thunderstorms, mainly before 7pm. Low around 76. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.
Monday
 
 Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms after 1pm. High near 86. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%.
Monday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm.
Tuesday
 
 Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly cloudy, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
 
 A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 73. Calm wind.
Wednesday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
 
 Partly cloudy, with a low around 75. Calm wind.
Thursday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming northwest around 5 mph.

 

Forecast from NOAA-NWS for Port Allen LA.