Measurements:
°C
°F
Bay Saint Louis
80°F
SW 13 mph
Feels like: 86°F
Precip: 25%
World Resorts USA Bay Saint Louis Weather

Bay Saint Louis Sea Water Temperature

Current Sea Water Temperature:
+86.6°F
Maximum Sea Water Temperature in October: 87.6°F
Minimum Sea Water Temperature in October: 68.2°F
Average water temperature in October: 79.2°F

Sea Water Temperature for the Last 10 Days:

October 05 86.6°F September 30 86.8°F
October 04 87.4°F September 29 87.2°F
October 03 87.2°F September 28 87.4°F
October 02 87.6°F September 27 87.8°F
October 01 87.4°F September 26 89.0°F

When is the Warmest Sea for Bay Saint Louis?

According to our data for the last three years for Bay Saint Louis the highest average sea water temperature was in August, July and June.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Bay Saint Louis was 91.3°F. The maximum and minimum values were 87.8°F and 93.0°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Bay Saint Louis was 90.9°F. The maximum and minimum values were 88.2°F and 92.2°F respectively.

Sea Water Temperature in June

Select Year: 2026 2025 2024

The average sea surface temperature in June 2026 for Bay Saint Louis was 87.5°F. The maximum and minimum values were 83.8°F and 90.8°F respectively.

Best Time to Visit Bay Saint Louis
The most sunny months:
October 20 days
September 15 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

Bay Saint Louis on the Weather Map

USA Resorts:
NAME
F°
Boston +58
Chicago +60
Hawaii +82
Houston +84
Las Vegas +92
Los Angeles +102
Maui +74
Miami +88
Myrtle Beach +70
New York +62
San Diego +84
San Francisco +66
Santa Monica +94
Sarasota +84
Washington +64
24 Hours Weather Forecast
Bay Saint Louis
Local time: 20:02
05 oct, monday
2100 80°F
SW
13 mph
06 oct, tuesday
0000 80°F
SW
15 mph
0300 78°F
SW
14 mph
0600 76°F
SW
15 mph
0900 76°F
SW
17 mph
1200 80°F
SW
14 mph
1500 84°F
SW
12 mph
1800 84°F
W
12 mph