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

Tonight: Mostly clear, with a low around 76. Calm wind.
Mostly Clear

 Wednesday

Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95. Heat index values as high as 109. Calm wind becoming northwest around 5 mph.
Sunny then
Chance
T-storms
 Wednesday
Night
Wednesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 4am. Partly cloudy, with a low around 77. Calm wind. Chance of precipitation is 30%.
Slight Chance
T-storms then
Chance
Showers
 Thursday

Thursday: A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 91. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 80%.
Chance
T-storms then
T-storms
 Thursday
Night
Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 70%.
Showers
Likely

 Friday

Friday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 91. Calm wind becoming north around 5 mph. Chance of precipitation is 70%.
T-storms
Likely

 Friday
Night
Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 30%.
Chance
T-storms

 Saturday

Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.
Chance
T-storms

 Saturday
Night
Saturday Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Calm wind.
Partly Cloudy
then Slight
Chance
T-storms
Lo 76 °F Hi 95 °F Lo 77 °F Hi 91 °F Lo 74 °F Hi 91 °F Lo 73 °F Hi 92 °F Lo 74 °F

 

Tonight
 
 Mostly clear, with a low around 76. Calm wind.
Wednesday
 
 A 40 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95. Heat index values as high as 109. Calm wind becoming northwest around 5 mph.
Wednesday Night
 
 A slight chance of showers and thunderstorms, then a chance of showers after 4am. Partly cloudy, with a low around 77. Calm wind. Chance of precipitation is 30%.
Thursday
 
 A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 91. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 80%.
Thursday Night
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 70%.
Friday
 
 Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 91. Calm wind becoming north around 5 mph. Chance of precipitation is 70%.
Friday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 30%.
Saturday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
 
 A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Calm wind.
Sunday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
 
 A slight chance of showers. Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm.
Monday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm.
Tuesday
 
 A chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.

 

Forecast from NOAA-NWS for Slidell LA.