Water Temperature of the Rio Grande in Mercedes, TX

Current Water Temperature

85.8°F

Measurement Time: Monday, June 15, 2026, 9:00 PM CDT

Temperature Locations

View Nearby Locations     View All Texas Locations     View Locations Near Me

Local Points of Interest

Mercedes Settling Basin; Matamoros Municipality, Mexico

Rio Grande

Station 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

75.9°F
Light rain
Light rain
80.6°F
82.4°F
94%
SE 19.2 mph
29.6 mph
77°F
74.1°F
0 in
75%
6 mi
1010 mbar
0

Five Day Weather Forecast

Moderate rain
Tue
H: 84°F
L: 75°F
Patchy rain nearby
Wed
H: 93°F
L: 74°F
Sunny
Thu
H: 95°F
L: 80°F
Partly Cloudy
Fri
H: 96°F
L: 80°F
Partly Cloudy
Sat
H: 94°F
L: 78°F

Air Quality

AQI: 1 - Good
PM2.5: 6.2 μg/m3
PM10: 7.9 μg/m3
Carbon Monoxide: 117 μg/m3
Nitrogen Dioxide: 6.1 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 44 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:32 PM
Sunset: 8:26 PM
Daylight: 13 hrs 46 mins
Moonrise: 8:07 AM
Moon Transit: 3:20 PM
Moonset: 10:29 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
2:50 PM - 5:20 PM

Minor Periods

9:59 PM - 11:29 PM
7:37 AM - 9:07 AM

Action Rating: 3 out of 5

Flash Flood Warning issued June 15 at 11:10PM CDT until June 15 at 11:15PM CDT by NWS Brownsville TX

Effective: Mon June 15, 2026, 11:10 PM
Expires: Mon June 15, 2026, 11:20 PM

The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. A Flood Watch remains in effect until 700 AM CDT Thursday for a portion of Deep South Texas.
Tuesday, June 16, 2026

Weather Forecast

Moderate rain
84°F
74.9°F
77.7°F
91%
0.38 in
89%
0%
19.2 mph
3.8


Air Quality

AQI: 1 - Good
PM2.5: 4.56 μg/m3
PM10: 5.33 μg/m3
Carbon Monoxide: 134.25 μg/m3
Nitrogen Dioxide: 8.11 μg/m3
Sulphur Dioxide: 1.58 μg/m3
Ozone: 44.33 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:32 PM
Sunset: 8:26 PM
Daylight: 13 hrs 46 mins
Moonrise: 8:07 AM
Moon Transit: 3:20 PM
Moonset: 10:29 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
2:50 PM - 5:20 PM

Minor Periods

9:59 PM - 11:29 PM
7:37 AM - 9:07 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Patchy rain nearby
93.4°F
74.4°F
82.1°F
79%
0.1 in
62%
0%
14.8 mph
11.9


Air Quality

AQI: 1 - Good
PM2.5: 3.7 μg/m3
PM10: 4.1 μg/m3
Carbon Monoxide: 130.88 μg/m3
Nitrogen Dioxide: 5.3 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 64.79 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:32 PM
Sunset: 8:26 PM
Daylight: 13 hrs 46 mins
Moonrise: 9:19 AM
Moon Transit: 4:21 PM
Moonset: 11:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

2:15 AM - 4:45 AM
3:51 PM - 6:21 PM

Minor Periods

12:00 AM - 12:00 AM
8:49 AM - 10:19 AM

Action Rating: 2 out of 5

Thursday, June 18, 2026

Weather Forecast

Sunny
95.3°F
79.9°F
86.1°F
79%
0 in
11%
0%
19.9 mph
12


Air Quality

AQI: 1 - Good
PM2.5: 8.6 μg/m3
PM10: 10.48 μg/m3
Carbon Monoxide: 131.46 μg/m3
Nitrogen Dioxide: 3.14 μg/m3
Sulphur Dioxide: 2.94 μg/m3
Ozone: 88.08 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:32 PM
Sunset: 8:26 PM
Daylight: 13 hrs 46 mins
Moonrise: 10:27 AM
Moon Transit: 5:15 PM
Moonset: 12:16 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

3:13 AM - 5:43 AM
4:45 PM - 7:15 PM

Minor Periods

9:57 AM - 11:27 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, June 19, 2026

Weather Forecast

Partly Cloudy
96.4°F
79.9°F
86.7°F
75%
0 in
11%
0%
16.8 mph
12.3


Air Quality

AQI: 1 - Good
PM2.5: 7.88 μg/m3
PM10: 10.58 μg/m3
Carbon Monoxide: 122.33 μg/m3
Nitrogen Dioxide: 3.08 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 68.5 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:33 PM
Sunset: 8:26 PM
Daylight: 13 hrs 46 mins
Moonrise: 11:31 AM
Moon Transit: 6:05 PM
Moonset: 12:57 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

4:05 AM - 6:35 AM
5:35 PM - 8:05 PM

Minor Periods

11:01 AM - 12:31 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Saturday, June 20, 2026

Weather Forecast

Partly Cloudy
93.6°F
78.2°F
84.2°F
79%
0 in
17%
0%
18.1 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.11 μg/m3
PM10: 9.83 μg/m3
Carbon Monoxide: 139 μg/m3
Nitrogen Dioxide: 4.24 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 49.25 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:33 PM
Sunset: 8:27 PM
Daylight: 13 hrs 46 mins
Moonrise: 12:31 AM
Moon Transit: 6:50 PM
Moonset: 12:32 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%

Best Times for Fishing or Hunting

Major Periods

4:53 AM - 7:23 AM
6:20 PM - 8:50 PM

Minor Periods

12:01 AM - 1:31 PM
12:02 AM - 1:32 AM

Action Rating: 3 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.

Webcams Near Mercedes, TX

Sponsored Content