National Weather Service Forecast for: Bay St. Louis MS
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 9:24 am CDT Oct 20, 2026
 
Today

Today: Sunny, with a high near 77. Northeast wind around 10 mph.
Sunny
 Tonight

Tonight: Clear, with a low around 57. Northeast wind 5 to 10 mph.
Clear
 Wednesday

Wednesday: Sunny, with a high near 78. Northeast wind 5 to 10 mph.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 59. Calm wind becoming north around 5 mph after midnight.
Clear
 Thursday

Thursday: Sunny, with a high near 80. North wind 5 to 10 mph becoming southeast in the afternoon.
Sunny
 Thursday
Night
Thursday Night: Clear, with a low around 59. Calm wind becoming north around 5 mph after midnight.
Clear
 Friday

Friday: Sunny, with a high near 78. North wind 5 to 10 mph becoming southeast in the afternoon.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 60. East wind 5 to 15 mph.
Clear
 Saturday

Saturday: Sunny, with a high near 75. Breezy, with an east wind 15 to 20 mph.
Sunny and
Breezy
Hi 77 °F Lo 57 °F Hi 78 °F Lo 59 °F Hi 80 °F Lo 59 °F Hi 78 °F Lo 60 °F Hi 75 °F

 

Today
 
 Sunny, with a high near 77. Northeast wind around 10 mph.
Tonight
 
 Clear, with a low around 57. Northeast wind 5 to 10 mph.
Wednesday
 
 Sunny, with a high near 78. Northeast wind 5 to 10 mph.
Wednesday Night
 
 Clear, with a low around 59. Calm wind becoming north around 5 mph after midnight.
Thursday
 
 Sunny, with a high near 80. North wind 5 to 10 mph becoming southeast in the afternoon.
Thursday Night
 
 Clear, with a low around 59. Calm wind becoming north around 5 mph after midnight.
Friday
 
 Sunny, with a high near 78. North wind 5 to 10 mph becoming southeast in the afternoon.
Friday Night
 
 Clear, with a low around 60. East wind 5 to 15 mph.
Saturday
 
 Sunny, with a high near 75. Breezy, with an east wind 15 to 20 mph.
Saturday Night
 
 Clear, with a low around 59. Northeast wind 10 to 15 mph.
Sunday
 
 Sunny, with a high near 75. Breezy, with an east wind 15 to 20 mph.
Sunday Night
 
 Mostly clear, with a low around 59. Northeast wind 10 to 15 mph.
Monday
 
 Mostly sunny, with a high near 75. Northeast wind 10 to 15 mph.

 

Forecast from NOAA-NWS for Bay St. Louis MS.