Water Temperature of Bay of St. Louis in Bay St. Louis, MS

Current Water Temperature

87.1°F

Measurement Time: Tuesday, July 21, 2026, 8:36 AM CDT

Today's Tides

 High: July 21, 5:11 AM, 1.7 ft
Low: July 21, 6:50 PM, 0.5 ft

Temperature Locations

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Local Points of Interest

Pass Christian, MS; Mississippi Sound; Gulf of Mexico

Bay of St. Louis

Station 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

80.6°F
Sunny
Sunny
86.8°F
87.9°F
84%
NNE 8.5 mph
11.5 mph
81.1°F
74.9°F
0 in
0%
9 mi
1011 mbar
1.2

Five Day Weather Forecast

Sunny
Tue
H: 94°F
L: 80°F
Sunny
Wed
H: 90°F
L: 78°F
Patchy rain nearby
Thu
H: 89°F
L: 82°F
Sunny
Fri
H: 92°F
L: 79°F
Partly Cloudy
Sat
H: 91°F
L: 79°F

Air Quality

AQI: 1 - Good
PM2.5: 8.1 μg/m3
PM10: 9.4 μg/m3
Carbon Monoxide: 119 μg/m3
Nitrogen Dioxide: 2.2 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 58 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:03 PM
Sunset: 7:58 PM
Daylight: 13 hrs 49 mins
Moonrise: 1:35 PM
Moon Transit: 7:03 PM
Moonset: 12:56 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
6:33 PM - 9:03 PM

Minor Periods

1:05 PM - 2:35 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tropical Storm Watch issued July 20 at 4:00PM CDT by NWS New Orleans LA

Effective: Mon July 20, 2026, 4:00 PM
Expires: Tue July 21, 2026, 6:00 AM

* WHAT...West winds 30 to 40 kt with gusts up to 55 kt and seas 9 to 14 ft. * WHERE...Coastal Gulf waters east of the mouth of the Mississippi River, including the sounds and Lake Borgne. * WHEN...Tropical Storm force winds possible from Tuesday afternoon until Wednesday afternoon. * IMPACTS...Tropical storm force winds and hazardous seas could capsize or damage vessels and reduce visibility.

Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas.


Tropical Storm Warning issued July 20 at 10:02PM CDT by NWS New Orleans LA

Effective: Mon July 20, 2026, 10:02 PM
Expires: Tue July 21, 2026, 12:15 PM

* WHAT...Southwest winds 30 to 40 kt with gusts up to 50 kt and seas 8 to 13 ft. * WHERE...Portions of Gulf of America. * WHEN...Tropical Storm force winds possible from early Tuesday 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.


Tropical Storm Warning issued July 21 at 4:44AM CDT by NWS New Orleans LA

Effective: Tue July 21, 2026, 4:44 AM
Expires: Tue July 21, 2026, 6:45 PM

* 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 Gulf of America. * 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.


Tropical Storm Warning issued July 20 at 9:58PM CDT by NWS New Orleans LA

Effective: Mon July 20, 2026, 9:58 PM
Expires: Tue July 21, 2026, 6:00 AM

A Tropical Storm Warning means tropical storm-force winds are expected somewhere within this area within the next 36 hours * LOCATIONS AFFECTED - Kiln - Pearlington - Bay St. Louis - Diamondhead - Waveland * WIND - LATEST LOCAL FORECAST: Tropical storm force winds remain possible - Peak Wind Forecast: 10-15 mph with gusts to 20 mph - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for wind 39 to 57 mph - The wind threat has remained nearly steady from the previous assessment. - PLAN: Plan for hazardous wind of equivalent tropical storm force. - PREPARE: Efforts to protect property should now be underway. Prepare for limited wind damage. - ACT: Act now to complete preparations before the wind becomes hazardous. - POTENTIAL IMPACTS: Limited - Damage to porches, awnings, carports, sheds, and unanchored mobile homes. Unsecured lightweight objects blown about. - Many large tree limbs broken off. A few trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Some fences and roadway signs blown over. - A few roads impassable from debris, particularly within urban or heavily wooded places. Hazardous driving conditions on bridges and other elevated roadways. - Scattered power and communications outages. * STORM SURGE - LATEST LOCAL FORECAST: Life-threatening storm surge possible - Peak Storm Surge Inundation: The potential for 2-4 feet above ground somewhere within surge prone areas - Window of concern: Begins Wednesday morning - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm surge flooding greater than 3 feet above ground - The storm surge threat has remained nearly steady from the previous assessment. - PLAN: Plan for life-threatening storm surge flooding of greater than 3 feet above ground. - PREPARE: Evacuation efforts and flood preparations should soon be brought to completion before conditions become unsafe. - ACT: Leave immediately if evacuation orders are given for your area to avoid being cut off from emergency services or needlessly risk lives. - POTENTIAL IMPACTS: Significant - Areas of inundation with storm surge flooding accentuated by waves. Damage to several buildings, mainly near the coast. - Sections of near-shore escape routes and secondary roads become weakened or washed out, especially in usually vulnerable low spots. - Major beach and shoreline erosion. - Moderate damage to marinas, docks, boardwalks, and piers. Several small craft broken away from moorings, especially in unprotected anchorages. * FLOODING RAIN - LATEST LOCAL FORECAST: - Peak Rainfall Amounts: Additional around 1 inch - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for localized flooding rain - The flooding rain threat has remained nearly steady from the previous assessment. - PLAN: Emergency plans should include the potential for localized flooding from heavy rain. - PREPARE: Consider protective actions if you are in an area vulnerable to flooding. - ACT: Heed any flood watches and warnings. - POTENTIAL IMPACTS: Limited - Localized rainfall flooding may prompt a few evacuations. - Rivers and tributaries may quickly rise with swifter currents. Small streams, creeks, canals, and ditches may become swollen and overflow in spots. - Flood waters can enter a few structures, especially in usually vulnerable spots. A few places where rapid ponding of water occurs at underpasses, low-lying spots, and poor drainage areas. Several storm drains and retention ponds become near-full and begin to overflow. Some brief road and bridge closures. * TORNADO - LATEST LOCAL FORECAST: - Situation is unfavorable for tornadoes - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Tornadoes not expected - The tornado threat has remained nearly steady from the previous assessment. - PLAN: Tornadoes are not expected. Showers and thunderstorms with gusty winds may still occur. - PREPARE: Little to no preparations needed to protect against tornadoes at this time. Keep informed of the latest tornado situation. - ACT: Listen for changes in the forecast. - POTENTIAL IMPACTS: Little to None - Little to no potential impacts from tornadoes. * FOR MORE INFORMATION: - https://www.msema.org


Storm Surge Watch issued July 20 at 9:58PM CDT by NWS New Orleans LA

Effective: Mon July 20, 2026, 9:58 PM
Expires: Tue July 21, 2026, 6:00 AM

A Tropical Storm Warning means tropical storm-force winds are expected somewhere within this area within the next 36 hours * LOCATIONS AFFECTED - Kiln - Pearlington - Bay St. Louis - Diamondhead - Waveland * WIND - LATEST LOCAL FORECAST: Tropical storm force winds remain possible - Peak Wind Forecast: 10-15 mph with gusts to 20 mph - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for wind 39 to 57 mph - The wind threat has remained nearly steady from the previous assessment. - PLAN: Plan for hazardous wind of equivalent tropical storm force. - PREPARE: Efforts to protect property should now be underway. Prepare for limited wind damage. - ACT: Act now to complete preparations before the wind becomes hazardous. - POTENTIAL IMPACTS: Limited - Damage to porches, awnings, carports, sheds, and unanchored mobile homes. Unsecured lightweight objects blown about. - Many large tree limbs broken off. A few trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Some fences and roadway signs blown over. - A few roads impassable from debris, particularly within urban or heavily wooded places. Hazardous driving conditions on bridges and other elevated roadways. - Scattered power and communications outages. * STORM SURGE - LATEST LOCAL FORECAST: Life-threatening storm surge possible - Peak Storm Surge Inundation: The potential for 2-4 feet above ground somewhere within surge prone areas - Window of concern: Begins Wednesday morning - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm surge flooding greater than 3 feet above ground - The storm surge threat has remained nearly steady from the previous assessment. - PLAN: Plan for life-threatening storm surge flooding of greater than 3 feet above ground. - PREPARE: Evacuation efforts and flood preparations should soon be brought to completion before conditions become unsafe. - ACT: Leave immediately if evacuation orders are given for your area to avoid being cut off from emergency services or needlessly risk lives. - POTENTIAL IMPACTS: Significant - Areas of inundation with storm surge flooding accentuated by waves. Damage to several buildings, mainly near the coast. - Sections of near-shore escape routes and secondary roads become weakened or washed out, especially in usually vulnerable low spots. - Major beach and shoreline erosion. - Moderate damage to marinas, docks, boardwalks, and piers. Several small craft broken away from moorings, especially in unprotected anchorages. * FLOODING RAIN - LATEST LOCAL FORECAST: - Peak Rainfall Amounts: Additional around 1 inch - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for localized flooding rain - The flooding rain threat has remained nearly steady from the previous assessment. - PLAN: Emergency plans should include the potential for localized flooding from heavy rain. - PREPARE: Consider protective actions if you are in an area vulnerable to flooding. - ACT: Heed any flood watches and warnings. - POTENTIAL IMPACTS: Limited - Localized rainfall flooding may prompt a few evacuations. - Rivers and tributaries may quickly rise with swifter currents. Small streams, creeks, canals, and ditches may become swollen and overflow in spots. - Flood waters can enter a few structures, especially in usually vulnerable spots. A few places where rapid ponding of water occurs at underpasses, low-lying spots, and poor drainage areas. Several storm drains and retention ponds become near-full and begin to overflow. Some brief road and bridge closures. * TORNADO - LATEST LOCAL FORECAST: - Situation is unfavorable for tornadoes - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Tornadoes not expected - The tornado threat has remained nearly steady from the previous assessment. - PLAN: Tornadoes are not expected. Showers and thunderstorms with gusty winds may still occur. - PREPARE: Little to no preparations needed to protect against tornadoes at this time. Keep informed of the latest tornado situation. - ACT: Listen for changes in the forecast. - POTENTIAL IMPACTS: Little to None - Little to no potential impacts from tornadoes. * FOR MORE INFORMATION: - https://www.msema.org


Tuesday, July 21, 2026

Weather Forecast

Sunny
93.9°F
80.4°F
86.1°F
72%
0 in
17%
0%
11.6 mph
11.7


Air Quality

AQI: 1 - Good
PM2.5: 7.57 μg/m3
PM10: 9.19 μg/m3
Carbon Monoxide: 114.04 μg/m3
Nitrogen Dioxide: 2.86 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 69.08 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:03 PM
Sunset: 7:58 PM
Daylight: 13 hrs 49 mins
Moonrise: 1:35 PM
Moon Transit: 7:03 PM
Moonset: 12:56 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
6:33 PM - 9:03 PM

Minor Periods

1:05 PM - 2:35 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
90.4°F
77.6°F
83.1°F
79%
0.02 in
36%
0%
22.4 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 7.57 μg/m3
PM10: 8.33 μg/m3
Carbon Monoxide: 112.58 μg/m3
Nitrogen Dioxide: 2.89 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 80.33 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:03 PM
Sunset: 7:57 PM
Daylight: 13 hrs 48 mins
Moonrise: 2:33 PM
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 AM
7:19 PM - 9:49 PM

Minor Periods

2:03 PM - 3:33 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Patchy rain nearby
88.7°F
81.7°F
84.7°F
76%
0.06 in
57%
0%
13.9 mph
10.6


Air Quality

AQI: 1 - Good
PM2.5: 12.82 μg/m3
PM10: 14.15 μg/m3
Carbon Monoxide: 118.25 μg/m3
Nitrogen Dioxide: 2.88 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 101.33 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:03 PM
Sunset: 7:57 PM
Daylight: 13 hrs 46 mins
Moonrise: 3:30 PM
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 AM
8:07 PM - 10:37 PM

Minor Periods

3:00 PM - 4:30 PM
12:32 AM - 2:02 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
91.5°F
79.4°F
84.5°F
73%
0.04 in
43%
0%
13.4 mph
10.7


Air Quality

AQI: 1 - Good
PM2.5: 8.8 μg/m3
PM10: 9.3 μg/m3
Carbon Monoxide: 130.15 μg/m3
Nitrogen Dioxide: 3.1 μg/m3
Sulphur Dioxide: 1.82 μg/m3
Ozone: 100.29 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:03 PM
Sunset: 7:56 PM
Daylight: 13 hrs 45 mins
Moonrise: 4:28 PM
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 AM
8:57 PM - 11:27 PM

Minor Periods

3:58 PM - 5:28 PM
1:11 AM - 2:41 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Partly Cloudy
91.1°F
78.7°F
84.4°F
71%
0 in
8%
0%
13 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 6.33 μg/m3
PM10: 7.04 μg/m3
Carbon Monoxide: 214 μg/m3
Nitrogen Dioxide: 4.04 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 62.5 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:03 PM
Sunset: 7:56 PM
Daylight: 13 hrs 44 mins
Moonrise: 5:21 PM
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 AM
12:00 AM - 12:00 AM

Minor Periods

4:51 PM - 6:21 PM
1:56 AM - 3:26 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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