Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

51.3°F

Measurement Time: Wednesday, May 13, 2026, 4:30 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

48.3°F
Clear
Clear
45.9°F
48.3°F
43%
ENE 5.8 mph
12.2 mph
45.9°F
27°F
0 in
0%
6 mi
1018 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 66°F
L: 47°F
Sunny
Fri
H: 64°F
L: 48°F
Sunny
Sat
H: 57°F
L: 43°F
Sunny
Sun
H: 58°F
L: 42°F
Sunny
Mon
H: 62°F
L: 41°F

Air Quality

AQI: 1 - Good
PM2.5: 3.55 μg/m3
PM10: 5.45 μg/m3
Carbon Monoxide: 126.85 μg/m3
Nitrogen Dioxide: 2.65 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:54 AM
Sunset: 8:01 PM
Daylight: 14 hrs 11 mins
Moonrise: 4:05 AM
Moon Transit: 10:54 AM
Moonset: 5:56 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

6:45 PM - 9:15 PM
10:24 AM - 12:54 AM

Minor Periods

5:26 PM - 6:56 PM
3:35 AM - 5:05 AM

Action Rating: 2 out of 5

Thursday, May 14, 2026

Weather Forecast

Sunny
66°F
46.8°F
55.6°F
38%
0 in
0%
0%
10.1 mph
9.8


Air Quality

AQI: 1 - Good
PM2.5: 5.17 μg/m3
PM10: 10.62 μg/m3
Carbon Monoxide: 124.81 μg/m3
Nitrogen Dioxide: 3.51 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 79.64 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:54 AM
Sunset: 8:01 PM
Daylight: 14 hrs 11 mins
Moonrise: 4:05 AM
Moon Transit: 10:54 AM
Moonset: 5:56 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

6:45 PM - 9:15 PM
10:24 AM - 12:54 AM

Minor Periods

5:26 PM - 6:56 PM
3:35 AM - 5:05 AM

Action Rating: 2 out of 5

Friday, May 15, 2026

Weather Forecast

Sunny
63.9°F
47.5°F
54.8°F
40%
0 in
0%
0%
10.1 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 6.14 μg/m3
PM10: 10.39 μg/m3
Carbon Monoxide: 135.25 μg/m3
Nitrogen Dioxide: 3.32 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 90.4 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:54 AM
Sunset: 8:01 PM
Daylight: 14 hrs 13 mins
Moonrise: 4:37 AM
Moon Transit: 11:48 AM
Moonset: 7:13 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

7:42 PM - 10:12 PM
11:18 AM - 1:48 PM

Minor Periods

6:43 PM - 8:13 PM
4:07 AM - 5:37 AM

Action Rating: 6 out of 5

Saturday, May 16, 2026

Weather Forecast

Sunny
57.2°F
43°F
49.4°F
35%
0 in
0%
0%
12.1 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 5.53 μg/m3
PM10: 9.83 μg/m3
Carbon Monoxide: 129.91 μg/m3
Nitrogen Dioxide: 2.84 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 97.4 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:54 AM
Sunset: 8:02 PM
Daylight: 14 hrs 15 mins
Moonrise: 5:15 AM
Moon Transit: 12:48 AM
Moonset: 8:33 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

8:43 PM - 11:13 PM
12:18 AM - 2:48 PM

Minor Periods

8:03 PM - 9:33 PM
4:45 AM - 6:15 AM

Action Rating: 5 out of 5

Sunday, May 17, 2026

Weather Forecast

Sunny
58°F
41.5°F
49.5°F
44%
0 in
0%
0%
10.3 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 4.35 μg/m3
PM10: 9.21 μg/m3
Carbon Monoxide: 138.06 μg/m3
Nitrogen Dioxide: 2.95 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 83.68 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:54 AM
Sunset: 8:03 PM
Daylight: 14 hrs 17 mins
Moonrise: 6:04 AM
Moon Transit: 1:53 PM
Moonset: 9:50 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:23 PM - 3:53 PM

Minor Periods

9:20 PM - 10:50 PM
5:34 AM - 7:04 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Sunny
62.2°F
41°F
51.1°F
46%
0 in
0%
0%
9.2 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 3.32 μg/m3
PM10: 7.37 μg/m3
Carbon Monoxide: 138 μg/m3
Nitrogen Dioxide: 4.27 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 64.54 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 18 mins
Moonrise: 7:03 AM
Moon Transit: 3:00 PM
Moonset: 10:58 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:30 PM - 5:00 PM

Minor Periods

10:28 PM - 11:58 PM
6:33 AM - 8:03 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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