National Weather Service Forecast for: Bay St. Louis MS
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 1:25 am CDT Apr 6, 2026
 
Overnight

Overnight: A 30 percent chance of showers, mainly after 5am. Cloudy, with a low around 58. Northeast wind around 15 mph.
Chance
Showers

 Monday

Monday: A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 67. Northeast wind around 15 mph.
Chance
Showers then
Mostly Cloudy
 Monday
Night
Monday Night: Mostly cloudy, then gradually becoming clear, with a low around 56. Northeast wind 10 to 15 mph.
Decreasing
Clouds

 Tuesday

Tuesday: Mostly sunny, with a high near 74. Northeast wind around 15 mph.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 63. East wind 10 to 15 mph.
Mostly Cloudy

 Wednesday

Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.
Chance
Showers and
Breezy
 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Breezy, with an east wind around 20 mph.
Chance
Showers and
Breezy
 Thursday

Thursday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72. Breezy, with an east wind 15 to 20 mph.
Chance
Showers and
Breezy
 Thursday
Night
Thursday Night: Mostly cloudy, with a low around 66. Breezy, with an east wind 15 to 20 mph.
Mostly Cloudy
and Breezy
then Mostly
Cloudy
Lo 58 °F Hi 67 °F Lo 56 °F Hi 74 °F Lo 63 °F Hi 72 °F Lo 64 °F Hi 72 °F Lo 66 °F

 

Overnight
 
 A 30 percent chance of showers, mainly after 5am. Cloudy, with a low around 58. Northeast wind around 15 mph.
Monday
 
 A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 67. Northeast wind around 15 mph.
Monday Night
 
 Mostly cloudy, then gradually becoming clear, with a low around 56. Northeast wind 10 to 15 mph.
Tuesday
 
 Mostly sunny, with a high near 74. Northeast wind around 15 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 63. East wind 10 to 15 mph.
Wednesday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Breezy, with an east wind around 20 mph.
Thursday
 
 A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72. Breezy, with an east wind 15 to 20 mph.
Thursday Night
 
 Mostly cloudy, with a low around 66. Breezy, with an east wind 15 to 20 mph.
Friday
 
 A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. Breezy, with an east wind 15 to 20 mph.
Friday Night
 
 A slight chance of showers. Mostly cloudy, with a low around 67. East wind 10 to 15 mph.
Saturday
 
 A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75. East wind around 15 mph.
Saturday Night
 
 Partly cloudy, with a low around 68. Southeast wind 10 to 15 mph.
Sunday
 
 Mostly sunny, with a high near 76. Southeast wind around 15 mph.

 

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