Measurements:
°C
°F
CURRENT WEATHER
08:41
Bay Saint Louis
86°F
S 6 mph
Feels like: 92°F
Precip: 8%
World Resorts USA Bay Saint Louis Weather

7 Day Weather Forecast

09.15
tue
DAY
90°F
NW 4 mph
precip
4%
NIGHT
88°F
NW 6 mph
precip
17%
09.16
wed
DAY
86°F
W 17 mph
precip
56%
NIGHT
86°F
NW 5 mph
precip
13%
09.17
thu
DAY
86°F
W 11 mph
precip
12%
NIGHT
84°F
NE 2 mph
precip
4%
09.18
fri
DAY
86°F
W 10 mph
precip
13%
NIGHT
86°F
NE 5 mph
precip
13%
09.19
sat
DAY
86°F
NW 6 mph
precip
5%
NIGHT
86°F
NW 16 mph
precip
17%
09.20
sun
DAY
86°F
N 7 mph
precip
52%
NIGHT
86°F
NW 11 mph
precip
27%
09.21
mon
DAY
86°F
N 7 mph
precip
17%
NIGHT
84°F
N 11 mph
precip
19%

Bay Saint Louis Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Bay Saint Louis was 30.2°F. The maximum and minimum values were 29.6°F and 30.7°F respectively.

Bay Saint Louis on the Weather Map

Best Time to Visit Bay Saint Louis
The most sunny months:
October 20 days
September 16 days
May 14 days
The most warm months:
July 92.8 °F
August 92.8 °F
June 90.8 °F
Warmest sea temperature:
August 91.0 °F
July 90.5 °F
June 87.6 °F
The most cold months:
January 58.1 °F
February 62.2 °F
December 62.3 °F
The most rainy months:
August 4 days
July 4 days
May 4 days
The most windy months:
April 9 mph
March 9 mph
January 9 mph
more details