National Weather Service Forecast for: Slidell LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 3:31 pm CST Dec 17, 2025
 
Tonight

Tonight: A slight chance of showers before 3am, then a chance of showers and thunderstorms between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Patchy fog before 11pm. Otherwise, cloudy, with a low around 56. East wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Slight Chance
Showers and
Patchy Fog
then Showers
Likely
 Thursday

Thursday: Showers and thunderstorms likely, mainly before 4pm. Patchy fog before 1pm. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 73. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely and
Patchy Fog

 Thursday
Night
Thursday Night: A 20 percent chance of showers before midnight. Patchy fog between 8pm and 10pm. Otherwise, partly cloudy, with a low around 47. Southwest wind around 5 mph becoming north after midnight. Winds could gust as high as 20 mph.
Slight Chance
Showers and
Patchy Fog
then Partly
Cloudy
 Friday

Friday: Sunny, with a high near 63. North wind around 5 mph.
Sunny


 Friday
Night
Friday Night: Mostly clear, with a low around 43. Calm wind.
Mostly Clear


 Saturday

Saturday: Sunny, with a high near 71. Light southeast wind becoming south 5 to 10 mph in the morning.
Sunny


 Saturday
Night
Saturday Night: Partly cloudy, with a low around 54. South wind around 5 mph becoming calm in the evening.
Partly Cloudy


 Sunday

Sunday: Mostly sunny, with a high near 73. Calm wind becoming south around 5 mph in the morning.
Mostly Sunny


 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 55. Southeast wind around 5 mph becoming calm.
Mostly Cloudy
Lo 56 °F Hi 73 °F Lo 47 °F Hi 63 °F Lo 43 °F Hi 71 °F Lo 54 °F Hi 73 °F Lo 55 °F

Dense Fog Advisory
 

Tonight
 
 A slight chance of showers before 3am, then a chance of showers and thunderstorms between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Patchy fog before 11pm. Otherwise, cloudy, with a low around 56. East wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
 
 Showers and thunderstorms likely, mainly before 4pm. Patchy fog before 1pm. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 73. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
 A 20 percent chance of showers before midnight. Patchy fog between 8pm and 10pm. Otherwise, partly cloudy, with a low around 47. Southwest wind around 5 mph becoming north after midnight. Winds could gust as high as 20 mph.
Friday
 
 Sunny, with a high near 63. North wind around 5 mph.
Friday Night
 
 Mostly clear, with a low around 43. Calm wind.
Saturday
 
 Sunny, with a high near 71. Light southeast wind becoming south 5 to 10 mph in the morning.
Saturday Night
 
 Partly cloudy, with a low around 54. South wind around 5 mph becoming calm in the evening.
Sunday
 
 Mostly sunny, with a high near 73. Calm wind becoming south around 5 mph in the morning.
Sunday Night
 
 Mostly cloudy, with a low around 55. Southeast wind around 5 mph becoming calm.
Monday
 
 Mostly sunny, with a high near 70. Calm wind becoming southeast around 5 mph in the morning.
Monday Night
 
 Partly cloudy, with a low around 54. East wind around 5 mph becoming calm.
Tuesday
 
 Sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the morning.
Tuesday Night
 
 Partly cloudy, with a low around 54. East wind around 5 mph becoming calm.
Wednesday
 
 Mostly sunny, with a high near 72. Calm wind becoming southeast around 5 mph.

 

Forecast from NOAA-NWS for Slidell LA.