Water Temperature of the Rio Grande in Mercedes, TX
Current Water Temperature
Measurement Time: Saturday, May 2, 2026, 12:00 PM CDT
Temperature Locations
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Local Points of Interest
Mercedes Settling Basin; Matamoros Municipality, MexicoStation Name: Rio Grande nr Mercedes, TX
Data Source: Water Data - usgc.gov
Elevation Above Sea Level: 76 feet
Nearest Address:
Mercedes, TX 78570
Hidalgo County
GPS Coordinates: 26.0615722, -97.8999833
Nearby Water Temperatures
Rio Grande, Los Indios, TX (8.5 mi)Rio Grande, Mission, TX (27.5 mi)
Rio Grande, Mission, TX (29.8 mi)
Rio Grande, Mission, TX (32.5 mi)
Laguna Madre, Bayview, TX (40.6 mi)
Port Isabel Channel, Port Isabel, TX (42.5 mi)
Laguna Madre, South Padre Island, TX (45.5 mi)
Brownsville Ship Channel, South Padre Island, TX (46.3 mi)
Laguna Madre, Armstrong, TX (57.6 mi)
Rio Grande, Rio Grande City, TX (59.2 mi)
Rio Grande, Roma, TX (73.1 mi)
Baffin Bay, Kingsville, TX (90.7 mi)
Gulf Intracoastal Waterway, Corpus Christi, TX (104.6 mi)
Packery Channel, Corpus Christi, TX (116.1 mi)
Corpus Christi Bay, Corpus Christi, TX (124.9 mi)
Weather for Mercedes, Texas
Current Weather

Five Day Weather Forecast

Sat
H: 73°F
L: 61°F

Sun
H: 82°F
L: 61°F

Mon
H: 84°F
L: 67°F

Tue
H: 90°F
L: 73°F

Wed
H: 100°F
L: 77°F
Air Quality
Nitrogen Dioxide: 8.55 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 100 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:04 PM
Daylight: 13 hrs 10 mins
Moon Transit: 1:47 AM
Moonset: 7:10 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
1:17 AM - 3:47 AM12:35 AM - 3:05 PM
Minor Periods
8:47 PM - 10:17 PM6:40 AM - 8:10 AM
Action Rating: 4 out of 5
Coastal Flood Statement issued May 2 at 2:09AM CDT until May 2 at 2:00PM CDT by NWS Brownsville TX
Effective: Sat May 2, 2026, 2:09 AM
Expires: Sat May 2, 2026, 1:00 PM
* WHAT...For the High Rip Current Risk, dangerous rip currents. For the High Surf Advisory, large breaking waves of 3 to 9 feet in the surf zone. For the Coastal Flood Statement, isolated minor coastal flooding expected. * WHERE...Kenedy Island, Willacy Island and Cameron Island Counties. * WHEN...For the High Rip Current Risk, through Sunday evening. For the High Surf Advisory, until 1 AM CDT Sunday. For the Coastal Flood Statement, until 2 PM CDT this afternoon. * IMPACTS...Wave run-up may approach the dunes along narrow beaches. Beach equipment, such as umbrellas and chairs, could be moved by waves. Vehicles driving along narrow beaches may experience higher water levels. Elevated water levels may also occur across the Laguna Madre and South Bay, and along State Highway 4 west of Boca Chica State Park. Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.
Do not drive through flooded roadways. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
High Surf Advisory issued May 2 at 2:09AM CDT until May 3 at 1:00AM CDT by NWS Brownsville TX
Effective: Sat May 2, 2026, 2:09 AM
Expires: Sat May 2, 2026, 1:00 PM
* WHAT...For the High Rip Current Risk, dangerous rip currents. For the High Surf Advisory, large breaking waves of 3 to 9 feet in the surf zone. For the Coastal Flood Statement, isolated minor coastal flooding expected. * WHERE...Kenedy Island, Willacy Island and Cameron Island Counties. * WHEN...For the High Rip Current Risk, through Sunday evening. For the High Surf Advisory, until 1 AM CDT Sunday. For the Coastal Flood Statement, until 2 PM CDT this afternoon. * IMPACTS...Wave run-up may approach the dunes along narrow beaches. Beach equipment, such as umbrellas and chairs, could be moved by waves. Vehicles driving along narrow beaches may experience higher water levels. Elevated water levels may also occur across the Laguna Madre and South Bay, and along State Highway 4 west of Boca Chica State Park. Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.
Do not drive through flooded roadways. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
Rip Current Statement issued May 2 at 2:09AM CDT until May 3 at 7:00PM CDT by NWS Brownsville TX
Effective: Sat May 2, 2026, 2:09 AM
Expires: Sat May 2, 2026, 1:00 PM
* WHAT...For the High Rip Current Risk, dangerous rip currents. For the High Surf Advisory, large breaking waves of 3 to 9 feet in the surf zone. For the Coastal Flood Statement, isolated minor coastal flooding expected. * WHERE...Kenedy Island, Willacy Island and Cameron Island Counties. * WHEN...For the High Rip Current Risk, through Sunday evening. For the High Surf Advisory, until 1 AM CDT Sunday. For the Coastal Flood Statement, until 2 PM CDT this afternoon. * IMPACTS...Wave run-up may approach the dunes along narrow beaches. Beach equipment, such as umbrellas and chairs, could be moved by waves. Vehicles driving along narrow beaches may experience higher water levels. Elevated water levels may also occur across the Laguna Madre and South Bay, and along State Highway 4 west of Boca Chica State Park. Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.
Do not drive through flooded roadways. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.27 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 84.04 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:04 PM
Daylight: 13 hrs 10 mins
Moon Transit: 1:47 AM
Moonset: 7:10 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
1:17 AM - 3:47 AM12:35 AM - 3:05 PM
Minor Periods
8:47 PM - 10:17 PM6:40 AM - 8:10 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 8.1 μg/m3
Sulphur Dioxide: 2.28 μg/m3
Ozone: 104.68 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:05 PM
Daylight: 13 hrs 11 mins
Moon Transit: 2:35 AM
Moonset: 7:51 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
2:05 AM - 4:35 AM1:24 PM - 3:54 PM
Minor Periods
9:43 PM - 11:13 PM7:21 AM - 8:51 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.63 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 91.24 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:05 PM
Daylight: 13 hrs 13 mins
Moon Transit: 3:25 AM
Moonset: 8:36 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%
Best Times for Fishing or Hunting
Major Periods
2:55 AM - 5:25 AM2:15 PM - 4:45 PM
Minor Periods
12:00 AM - 12:00 AM8:06 AM - 9:36 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.47 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 83.36 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:06 PM
Daylight: 13 hrs 14 mins
Moon Transit: 4:16 AM
Moonset: 9:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%
Best Times for Fishing or Hunting
Major Periods
3:46 AM - 6:16 AM3:06 PM - 5:36 PM
Minor Periods
8:56 AM - 10:26 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 73.23 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:06 PM
Daylight: 13 hrs 15 mins
Moon Transit: 5:08 AM
Moonset: 10:20 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
4:38 AM - 7:08 AM3:57 PM - 6:27 PM
Minor Periods
9:50 AM - 11:20 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
