Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

61.2°F

Measurement Time: Tuesday, July 7, 2026, 7:30 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

55.8°F
Clear
Clear
47.5°F
55.8°F
44%
E 5.1 mph
10.8 mph
54.9°F
34.5°F
0 in
0%
6 mi
1019 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 77°F
L: 55°F
Sunny
Thu
H: 78°F
L: 55°F
Sunny
Fri
H: 81°F
L: 57°F
Sunny
Sat
H: 82°F
L: 60°F
Sunny
Sun
H: 83°F
L: 61°F

Air Quality

AQI: 1 - Good
PM2.5: 4.8 μg/m3
PM10: 5.8 μg/m3
Carbon Monoxide: 88 μg/m3
Nitrogen Dioxide: 6.3 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:03 PM
Sunset: 8:23 PM
Daylight: 14 hrs 39 mins
Moonrise: 12:32 AM
Moon Transit: 7:23 AM
Moonset: 2:28 PM
Moon Phase: Last Quarter
Moon Illumination: 26.8%

Best Times for Fishing or Hunting

Major Periods

6:53 AM - 9:23 AM
3:14 PM - 5:44 PM

Minor Periods

1:58 PM - 3:28 PM
12:02 AM - 1:32 AM

Action Rating: 2 out of 5

Lake Wind Advisory issued July 7 at 2:35PM PDT until July 9 at 11:00PM PDT by NWS Hanford CA

Effective: Tue July 7, 2026, 2:35 PM
Expires: Wed July 8, 2026, 3:00 PM

* WHAT...West winds 15 to 20 mph with gusts up to 35 mph. * WHERE...West Side Mountains north of 198. * WHEN...Until 11 PM PDT Thursday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Wednesday, July 8, 2026

Weather Forecast

Sunny
77.3°F
55.1°F
65.1°F
29%
0 in
0%
0%
11.2 mph
12.1


Air Quality

AQI: 1 - Good
PM2.5: 4.71 μg/m3
PM10: 6.18 μg/m3
Carbon Monoxide: 91.38 μg/m3
Nitrogen Dioxide: 2.86 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 89.38 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:03 PM
Sunset: 8:23 PM
Daylight: 14 hrs 39 mins
Moonrise: 12:32 AM
Moon Transit: 7:23 AM
Moonset: 2:28 PM
Moon Phase: Last Quarter
Moon Illumination: 26.8%

Best Times for Fishing or Hunting

Major Periods

6:53 AM - 9:23 AM
3:14 PM - 5:44 PM

Minor Periods

1:58 PM - 3:28 PM
12:02 AM - 1:32 AM

Action Rating: 2 out of 5

Thursday, July 9, 2026

Weather Forecast

Sunny
78.4°F
55.3°F
66°F
19%
0 in
0%
0%
10.7 mph
12


Air Quality

AQI: 1 - Good
PM2.5: 4.26 μg/m3
PM10: 5.85 μg/m3
Carbon Monoxide: 92.54 μg/m3
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 95.54 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:03 PM
Sunset: 8:22 PM
Daylight: 14 hrs 38 mins
Moonrise: 1:02 AM
Moon Transit: 8:15 AM
Moonset: 3:41 PM
Moon Phase: Last Quarter
Moon Illumination: 17.4%

Best Times for Fishing or Hunting

Major Periods

7:45 AM - 10:15 AM
4:08 PM - 6:38 PM

Minor Periods

3:11 PM - 4:41 PM
12:32 AM - 2:02 AM

Action Rating: 2 out of 5

Friday, July 10, 2026

Weather Forecast

Sunny
81°F
56.9°F
68.1°F
19%
0 in
0%
0%
10.7 mph
12.7


Air Quality

AQI: 1 - Good
PM2.5: 4.42 μg/m3
PM10: 5.93 μg/m3
Carbon Monoxide: 93.29 μg/m3
Nitrogen Dioxide: 2.65 μg/m3
Sulphur Dioxide: 0.55 μg/m3
Ozone: 93.58 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:03 PM
Sunset: 8:22 PM
Daylight: 14 hrs 37 mins
Moonrise: 1:39 AM
Moon Transit: 9:13 AM
Moonset: 4:58 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.7%

Best Times for Fishing or Hunting

Major Periods

8:43 AM - 11:13 AM
5:07 PM - 7:37 PM

Minor Periods

4:28 PM - 5:58 PM
1:09 AM - 2:39 AM

Action Rating: 2 out of 5

Saturday, July 11, 2026

Weather Forecast

Sunny
82.4°F
60.1°F
70.2°F
20%
0 in
1%
0%
11.2 mph
12.6


Air Quality

AQI: 1 - Good
PM2.5: 4.21 μg/m3
PM10: 5.52 μg/m3
Carbon Monoxide: 98.37 μg/m3
Nitrogen Dioxide: 2.52 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 89.58 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:03 PM
Sunset: 8:22 PM
Daylight: 14 hrs 36 mins
Moonrise: 2:27 AM
Moon Transit: 10:16 AM
Moonset: 6:12 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

6:12 PM - 8:42 PM
9:46 AM - 12:16 AM

Minor Periods

5:42 PM - 7:12 PM
1:57 AM - 3:27 AM

Action Rating: 3 out of 5

Sunday, July 12, 2026

Weather Forecast

Sunny
83.3°F
61.4°F
71.7°F
22%
0 in
2%
0%
12.1 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.67 μg/m3
PM10: 5.97 μg/m3
Carbon Monoxide: 117.83 μg/m3
Nitrogen Dioxide: 4.45 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:03 PM
Sunset: 8:21 PM
Daylight: 14 hrs 35 mins
Moonrise: 3:25 AM
Moon Transit: 11:23 AM
Moonset: 7:20 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

7:19 PM - 9:49 PM
10:53 AM - 1:23 PM

Minor Periods

6:50 PM - 8:20 PM
2:55 AM - 4:25 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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