National Weather Service Forecast for: Slidell LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 10:56 pm CDT Jul 27, 2026
 
Overnight

Overnight: Mostly clear, with a low around 79. West wind around 5 mph.
Mostly Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 97. Heat index values as high as 109. West wind 5 to 10 mph.
Hot

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 79. West wind around 5 mph.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny and hot, with a high near 98. Heat index values as high as 111. West wind 5 to 10 mph.
Hot

 Wednesday
Night
Wednesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 78. Southwest wind around 5 mph.
Mostly Cloudy
then Slight
Chance
Showers
 Thursday

Thursday: Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 94. West wind 5 to 10 mph. Chance of precipitation is 60%.
Slight Chance
T-storms then
T-storms
Likely
 Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. Southwest wind around 5 mph.
Chance
T-storms

 Friday

Friday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. West wind around 5 mph.
Chance
T-storms

 Friday
Night
Friday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Southwest wind around 5 mph.
Slight Chance
T-storms
Lo 79 °F Hi 97 °F Lo 79 °F Hi 98 °F Lo 78 °F Hi 94 °F Lo 77 °F Hi 92 °F Lo 77 °F

Extreme Heat Warning
 

Overnight
 
 Mostly clear, with a low around 79. West wind around 5 mph.
Tuesday
 
 Sunny and hot, with a high near 97. Heat index values as high as 109. West wind 5 to 10 mph.
Tuesday Night
 
 Mostly clear, with a low around 79. West wind around 5 mph.
Wednesday
 
 Mostly sunny and hot, with a high near 98. Heat index values as high as 111. West wind 5 to 10 mph.
Wednesday Night
 
 A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 78. Southwest wind around 5 mph.
Thursday
 
 Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 94. West wind 5 to 10 mph. Chance of precipitation is 60%.
Thursday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. Southwest wind around 5 mph.
Friday
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. West wind around 5 mph.
Friday Night
 
 A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Southwest wind around 5 mph.
Saturday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 91. West wind 5 to 10 mph.
Saturday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Southwest wind 5 to 10 mph.
Sunday
 
 Showers and thunderstorms likely. Partly sunny, with a high near 91. Southwest wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Southwest wind around 5 mph.
Monday
 
 Showers and thunderstorms likely. Partly sunny, with a high near 90. Southwest wind around 5 mph.

 

Forecast from NOAA-NWS for Slidell LA.