World Resorts USA Bay Saint Louis Weather

Bay Saint Louis 7 Days Forecast

02.09
wed
Day
90°F
NW 7 mph
Precip.
9%
Night
82°F
N 2 mph
Precip.
8%
03.09
thu
Day
84°F
NW 4 mph
Precip.
5%
Night
82°F
N 6 mph
Precip.
23%
04.09
fri
Day
84°F
NW 4 mph
Precip.
45%
Night
82°F
NE 11 mph
Precip.
9%
05.09
sat
Day
86°F
NE 6 mph
Precip.
57%
Night
82°F
E 9 mph
Precip.
9%
06.09
sun
Day
88°F
E 4 mph
Precip.
14%
Night
81°F
E 9 mph
Precip.
37%
07.09
mon
Day
84°F
NE 7 mph
Precip.
36%
Night
82°F
E 11 mph
Precip.
40%
08.09
tue
Day
86°F
NE 9 mph
Precip.
43%
Night
82°F
NE 12 mph
Precip.
42%

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 84.0°F. The highest and lowest sea temperatures during the month were 85.6°F and 82.2°F.

Air temperature in Bay Saint Louis, °F

Precipitation total in Bay Saint Louis, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Bay Saint Louis

Sunniest months:
October 20 days
September 16 days
May 14 days
Warmest months:
July 88.5 °F
August 88.5 °F
June 86.7 °F
Warmest sea temp:
August 86.9 °F
July 86.5 °F
June 83.9 °F
Coldest months:
January 57.3 °F
February 61.0 °F
December 61.0 °F
Rainiest months:
August 4 days
July 4 days
May 4 days
Windiest months:
April 9.2 mph
March 9.1 mph
January 8.8 mph

Bay Saint Louis on a weather map

Current weather
10:51
Bay Saint Louis
+90°F
NW 7 mph
Feels like: +109°F
Precip.: 9%
Places in USA:
Name
°F
Boston
+72°F
Washington
+91°F
Hawaii
+77°F
Las Vegas
+84°F
Los Angeles
+70°F
Miami
+88°F
Maui
+63°F
Myrtle Beach
+91°F
New York
+73°F
San Diego
+73°F
San Francisco
+63°F
Santa Monica
+70°F
Sarasota
+84°F
Houston
+90°F
Chicago
+88°F
all places
24 Hours Forecast
Bay Saint Louis
Local time: 10:51
September 02, wednesday
1200
90°F
NW
7 mph
1500
88°F
N
7 mph
1800
84°F
N
6 mph
2100
84°F
N
6 mph
September 03, thursday
0000
82°F
N
2 mph
0300
81°F
SE
5 mph
0600
81°F
S
5 mph
0900
81°F
SW
4 mph
Units of measurement: °C / °F