Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

57.7°F

Measurement Time: Tuesday, July 28, 2026, 11:30 PM PDT

Temperature Locations

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Local Points of Interest

Happy Isles Bridge; Yosemite National Park

Merced River

Station Name: MERCED R A HAPPY ISLES BRIDGE NR YOSEMITE CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 4,095 feet

Nearest Address:
Happy Isle Loop Rd
Yosemite Valley, CA 95389
Mariposa County

GPS Coordinates: 37.73131496, -119.5590514

Nearby Water Temperatures

Tuolumne River, Groveland, CA (13.9 mi)
Tuolumne River, Groveland, CA (19.3 mi)
Tuolumne River, Groveland, CA (23.5 mi)
Tuolumne River, Groveland, CA (24.7 mi)
Cherry Creek, Groveland, CA (25.5 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (26.7 mi)
Deadman Creek, Mammoth Lakes, CA (33.9 mi)
Hot Creek, Mammoth Lakes, CA (38.6 mi)
Hot Creek, Mammoth Lakes, CA (39.2 mi)
Hot Creek, Mammoth Lakes, CA (40.8 mi)
San Joaquin River, Friant, CA (52.4 mi)
Walker Lake, Walker Lake, NV (80.9 mi)
Walker Lake, Walker Lake, NV (83.8 mi)
Trout Creek, South Lake Tahoe, CA (85.1 mi)
Upper Truckee River, South Lake Tahoe, CA (85.6 mi)

Weather for Yosemite Valley, California

Current Weather

58.4°F
Sunny
Sunny
48°F
58.4°F
17%
E 5.6 mph
11.7 mph
57.9°F
14°F
0 in
0%
6 mi
1016 mbar
0.4

Five Day Weather Forecast

Sunny
Wed
H: 79°F
L: 54°F
Sunny
Thu
H: 82°F
L: 58°F
Sunny
Fri
H: 86°F
L: 61°F
Sunny
Sat
H: 86°F
L: 63°F
Sunny
Sun
H: 85°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 4.3 μg/m3
PM10: 5.3 μg/m3
Carbon Monoxide: 88 μg/m3
Nitrogen Dioxide: 3.7 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:04 PM
Sunset: 8:10 PM
Daylight: 14 hrs 10 mins
Moonrise: 8:32 PM
Moon Transit: 12:54 AM
Moonset: 5:54 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:24 AM - 2:54 AM
8:43 AM - 11:13 AM

Minor Periods

8:02 PM - 9:32 PM
5:24 AM - 6:54 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
79°F
54°F
66°F
18%
0 in
0%
0%
10.7 mph
11.3


Air Quality

AQI: 1 - Good
PM2.5: 3.92 μg/m3
PM10: 4.84 μg/m3
Carbon Monoxide: 91.83 μg/m3
Nitrogen Dioxide: 2.91 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 102.5 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:04 PM
Sunset: 8:10 PM
Daylight: 14 hrs 10 mins
Moonrise: 8:32 PM
Moon Transit: 12:54 AM
Moonset: 5:54 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:24 AM - 2:54 AM
8:43 AM - 11:13 AM

Minor Periods

8:02 PM - 9:32 PM
5:24 AM - 6:54 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
81.9°F
58°F
68.7°F
21%
0 in
0%
0%
10.5 mph
12


Air Quality

AQI: 1 - Good
PM2.5: 4.08 μg/m3
PM10: 5.09 μg/m3
Carbon Monoxide: 93.63 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 0.59 μg/m3
Ozone: 98.67 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:04 PM
Sunset: 8:09 PM
Daylight: 14 hrs 8 mins
Moonrise: 8:58 PM
Moon Transit: 1:40 AM
Moonset: 6:57 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:10 AM - 3:40 AM
9:30 AM - 12:00 AM

Minor Periods

8:28 PM - 9:58 PM
6:27 AM - 7:57 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
85.5°F
60.5°F
71.6°F
20%
0 in
0%
0%
11 mph
11.8


Air Quality

AQI: 1 - Good
PM2.5: 4.28 μg/m3
PM10: 5.49 μg/m3
Carbon Monoxide: 94.79 μg/m3
Nitrogen Dioxide: 2.58 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 95.54 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:04 PM
Sunset: 8:08 PM
Daylight: 14 hrs 6 mins
Moonrise: 9:23 PM
Moon Transit: 2:24 AM
Moonset: 8:00 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:54 AM - 4:24 AM
10:13 AM - 12:43 AM

Minor Periods

8:53 PM - 10:23 PM
7:30 AM - 9:00 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
85.9°F
62.6°F
72.9°F
16%
0 in
0%
0%
11.2 mph
11.7


Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 5.76 μg/m3
Carbon Monoxide: 97.73 μg/m3
Nitrogen Dioxide: 2.49 μg/m3
Sulphur Dioxide: 0.55 μg/m3
Ozone: 98.5 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:04 PM
Sunset: 8:07 PM
Daylight: 14 hrs 5 mins
Moonrise: 9:46 PM
Moon Transit: 3:08 AM
Moonset: 9:03 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:38 AM - 5:08 AM
10:56 AM - 1:26 PM

Minor Periods

9:16 PM - 10:46 PM
8:33 AM - 10:03 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
85.2°F
62.5°F
72.2°F
17%
0 in
0%
0%
11.2 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.85 μg/m3
PM10: 6.05 μg/m3
Carbon Monoxide: 123 μg/m3
Nitrogen Dioxide: 5.05 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 74.67 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:04 PM
Sunset: 8:06 PM
Daylight: 14 hrs 3 mins
Moonrise: 10:10 PM
Moon Transit: 3:51 AM
Moonset: 10:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:21 AM - 5:51 AM
3:20 PM - 5:50 PM

Minor Periods

9:40 PM - 11:10 PM
9:36 AM - 11:06 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.

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