Water Temperature of Bay of St. Louis in Bay St. Louis, MS
Current Water Temperature
Measurement Time: Wednesday, July 22, 2026, 12:06 AM CDT
Today's Tides
High: July 22, 5:46 AM, 1.9 ft
Low: July 22, 6:54 PM, 0.3 ft
Temperature Locations
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Local Points of Interest
Pass Christian, MS; Mississippi Sound; Gulf of MexicoStation Name: Bay Waveland Yacht Club
Data Source: NOAA Tides and Currents
Elevation Above Sea Level: 0 feet
Sensor Depth: -1 feet
Nearest Address:
1 Yacht Club Drive
Bay St. Louis, MS 39520
Hancock County
GPS Coordinates: 30.325000, -89.325000
Nearby Water Temperatures
Mississippi Sound, Pass Christian, MS (7.7 mi)Mississippi Sound, Waveland, MS (10.9 mi)
Mississippi Sound, Biloxi, MS (21 mi)
Biloxy Bay, Biloxi, MS (28.2 mi)
Lake Borgne, Shell Beach, LA (37.8 mi)
Mississippi Sound, Pascagoula, MS (44.2 mi)
Pascagoula River, Pascagoula, MS (45.5 mi)
Cypress Creek, Brooklyn, MS (51.7 mi)
Mississippi River, New Orleans, LA (55.5 mi)
Leaf River, New Augusta, MS (64 mi)
Gulf of Mexico, Dauphin Island, AL (74.8 mi)
Bayou Gauche, Bayou Gauche, LA (75.3 mi)
Mobile Bay, Mobile, AL (78.7 mi)
Mississippi River, Pilottown, LA (79.3 mi)
Mobile River, Mobile, AL (80.9 mi)
Weather for Bay St. Louis, Mississippi
Current Weather

Five Day Weather Forecast

Wed
H: 89°F
L: 80°F

Thu
H: 89°F
L: 81°F

Fri
H: 89°F
L: 79°F

Sat
H: 90°F
L: 78°F

Sun
H: 91°F
L: 78°F
Air Quality
Nitrogen Dioxide: 1.2 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 74 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 7:57 PM
Daylight: 13 hrs 48 mins
Moon Transit: 7:49 PM
Moonset: 12:27 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%
Best Times for Fishing or Hunting
Major Periods
7:01 AM - 9:31 AM7:19 PM - 9:49 PM
Minor Periods
2:03 PM - 3:33 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Tropical Storm Warning issued July 21 at 4:19PM CDT by NWS New Orleans LA
Effective: Tue July 21, 2026, 4:19 PM
Expires: Wed July 22, 2026, 6:30 AM
* WHAT...Southwest winds 30 to 40 kt with gusts up to 55 kt and seas 8 to 13 ft. * WHERE...Portions of the Gulf including Lake Borgne, Breton Sound, Chandeleur Sound. * WHEN...Tropical Storm force winds possible until Wednesday afternoon. * IMPACTS...Tropical storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.
Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions.
Tropical Storm Warning issued July 21 at 10:16AM CDT by NWS New Orleans LA
Effective: Tue July 21, 2026, 10:16 AM
Expires: Wed July 22, 2026, 12:30 AM
* WHAT...Southwest winds 30 to 40 kt with gusts up to 50 kt and waves 3 to 6 feet over protected waters and seas 8 to 14 feet over open waters. * WHERE...Portions of the Gulf including Lake Borgne, Breton Sound, Chandeleur Sound. * WHEN...Tropical Storm force winds possible from early this afternoon until early Thursday morning. * IMPACTS...Tropical storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.
Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions.
Heat Advisory issued July 21 at 12:32PM CDT until July 21 at 7:00PM CDT by NWS New Orleans LA
Effective: Tue July 21, 2026, 12:32 PM
Expires: Wed July 22, 2026, 2:45 AM
* WHAT...For the first Heat Advisory, heat index values up to 113. For the second Heat Advisory, heat index values up to 109 expected. * WHERE...Northern Hancock, Northern Harrison, Northern Jackson, Southern Hancock, Southern Harrison, and Southern Jackson Counties. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from 10 AM to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Heat Advisory issued July 21 at 12:32PM CDT until July 22 at 8:00PM CDT by NWS New Orleans LA
Effective: Tue July 21, 2026, 12:32 PM
Expires: Wed July 22, 2026, 2:45 AM
* WHAT...For the first Heat Advisory, heat index values up to 113. For the second Heat Advisory, heat index values up to 109 expected. * WHERE...Northern Hancock, Northern Harrison, Northern Jackson, Southern Hancock, Southern Harrison, and Southern Jackson Counties. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from 10 AM to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Heat Advisory issued July 21 at 10:33PM CDT until July 22 at 8:00PM CDT by NWS New Orleans LA
Effective: Tue July 21, 2026, 10:33 PM
Expires: Wed July 22, 2026, 12:45 PM
* WHAT...Heat index values up to 113 expected. * WHERE...Northern Hancock, Northern Harrison, Northern Jackson, Southern Hancock, Southern Harrison, and Southern Jackson Counties. * WHEN...From 10 AM to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.84 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 81.25 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 7:57 PM
Daylight: 13 hrs 48 mins
Moon Transit: 7:49 PM
Moonset: 12:27 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%
Best Times for Fishing or Hunting
Major Periods
7:01 AM - 9:31 AM7:19 PM - 9:49 PM
Minor Periods
2:03 PM - 3:33 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 2.63 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 73.25 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 7:57 PM
Daylight: 13 hrs 46 mins
Moon Transit: 8:37 PM
Moonset: 1:02 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%
Best Times for Fishing or Hunting
Major Periods
7:48 AM - 10:18 AM8:07 PM - 10:37 PM
Minor Periods
3:00 PM - 4:30 PM12:32 AM - 2:02 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 2.62 μg/m3
Sulphur Dioxide: 1.32 μg/m3
Ozone: 69.08 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 7:56 PM
Daylight: 13 hrs 45 mins
Moon Transit: 9:27 PM
Moonset: 1:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%
Best Times for Fishing or Hunting
Major Periods
8:37 AM - 11:07 AM8:57 PM - 11:27 PM
Minor Periods
3:58 PM - 5:28 PM1:11 AM - 2:41 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 2.95 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 63.13 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 7:56 PM
Daylight: 13 hrs 44 mins
Moon Transit: 10:18 PM
Moonset: 2:26 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%
Best Times for Fishing or Hunting
Major Periods
9:28 AM - 11:58 AM12:00 AM - 12:00 AM
Minor Periods
4:51 PM - 6:21 PM1:56 AM - 3:26 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.28 μg/m3
Sulphur Dioxide: 1.84 μg/m3
Ozone: 44.63 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 7:55 PM
Daylight: 13 hrs 43 mins
Moon Transit: 11:10 PM
Moonset: 3:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%
Best Times for Fishing or Hunting
Major Periods
10:19 AM - 12:49 AM12:00 AM - 12:00 AM
Minor Periods
5:42 PM - 7:12 PM2:45 AM - 4:15 AM
Action Rating: 2 out of 5
