Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

48.6°F

Measurement Time: Saturday, May 23, 2026, 1:30 AM 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

59.2°F
Sunny
Sunny
59°F
59.2°F
27%
SW 4 mph
4.6 mph
59°F
25.3°F
0 in
0%
6 mi
1013 mbar
3

Five Day Weather Forecast

Sunny
Sat
H: 67°F
L: 48°F
Patchy rain nearby
Sun
H: 64°F
L: 49°F
Patchy rain nearby
Mon
H: 64°F
L: 47°F
Sunny
Tue
H: 55°F
L: 38°F
Patchy rain nearby
Wed
H: 47°F
L: 36°F

Air Quality

AQI: 1 - Good
PM2.5: 11.75 μg/m3
PM10: 23.95 μg/m3
Carbon Monoxide: 130.85 μg/m3
Nitrogen Dioxide: 1.05 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 134 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:55 AM
Sunset: 8:08 PM
Daylight: 14 hrs 26 mins
Moonrise: 1:01 PM
Moon Transit: 7:39 PM
Moonset: 1:42 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
7:09 PM - 9:39 PM

Minor Periods

12:31 AM - 2:01 PM
1:12 AM - 2:42 AM

Action Rating: 3 out of 5

Saturday, May 23, 2026

Weather Forecast

Sunny
66.5°F
47.7°F
56.3°F
37%
0 in
0%
0%
11 mph
9.9


Air Quality

AQI: 1 - Good
PM2.5: 9.03 μg/m3
PM10: 17.66 μg/m3
Carbon Monoxide: 128.45 μg/m3
Nitrogen Dioxide: 2.71 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 112.56 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:55 AM
Sunset: 8:08 PM
Daylight: 14 hrs 26 mins
Moonrise: 1:01 PM
Moon Transit: 7:39 PM
Moonset: 1:42 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
7:09 PM - 9:39 PM

Minor Periods

12:31 AM - 2:01 PM
1:12 AM - 2:42 AM

Action Rating: 3 out of 5

Sunday, May 24, 2026

Weather Forecast

Patchy rain nearby
64.2°F
49.3°F
55.6°F
48%
0.04 in
82%
0%
9.4 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 11.27 μg/m3
PM10: 23.57 μg/m3
Carbon Monoxide: 127.81 μg/m3
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 108.84 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:55 AM
Sunset: 8:09 PM
Daylight: 14 hrs 27 mins
Moonrise: 2:06 PM
Moon Transit: 8:22 PM
Moonset: 2:07 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
7:52 PM - 10:22 PM

Minor Periods

1:36 PM - 3:06 PM
1:37 AM - 3:07 AM

Action Rating: 4 out of 5

Monday, May 25, 2026

Weather Forecast

Patchy rain nearby
63.6°F
47.3°F
54.5°F
52%
0.01 in
80%
0%
10.7 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 8.91 μg/m3
PM10: 17.09 μg/m3
Carbon Monoxide: 127.05 μg/m3
Nitrogen Dioxide: 3.15 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 93.64 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:55 AM
Sunset: 8:10 PM
Daylight: 14 hrs 29 mins
Moonrise: 3:07 PM
Moon Transit: 9:04 PM
Moonset: 2:31 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

4:10 AM - 6:40 AM
8:34 PM - 11:04 PM

Minor Periods

2:37 PM - 4:07 PM
2:01 AM - 3:31 AM

Action Rating: 3 out of 5

Tuesday, May 26, 2026

Weather Forecast

Sunny
54.7°F
37.6°F
47.3°F
55%
0 in
0%
0%
14.3 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 8.9 μg/m3
PM10: 20.67 μg/m3
Carbon Monoxide: 120.84 μg/m3
Nitrogen Dioxide: 2.75 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 102.16 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:55 AM
Sunset: 8:10 PM
Daylight: 14 hrs 30 mins
Moonrise: 4:08 PM
Moon Transit: 9:46 PM
Moonset: 2:53 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

4:52 AM - 7:22 AM
9:16 PM - 11:46 PM

Minor Periods

3:38 PM - 5:08 PM
2:23 AM - 3:53 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Patchy rain nearby
47°F
35.5°F
40°F
61%
0.17 in
87%
0%
12.1 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 6.76 μg/m3
PM10: 18.43 μg/m3
Carbon Monoxide: 123.8 μg/m3
Nitrogen Dioxide: 4.84 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 67.08 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:55 AM
Sunset: 8:11 PM
Daylight: 14 hrs 31 mins
Moonrise: 5:09 PM
Moon Transit: 10:29 PM
Moonset: 3:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

5:34 AM - 8:04 AM
12:00 AM - 12:00 AM

Minor Periods

4:39 PM - 6:09 PM
2:47 AM - 4:17 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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