Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

52.5°F

Measurement Time: Monday, September 28, 2026, 4:30 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

68°F
Areas Of Smoke
Areas Of Smoke
39%
W 5 mph
42°F

Weather Forecast

Areas Of Smoke
This Afternoon
68°F - Areas Of Smoke
Areas Of Smoke
Tonight
52°F - Areas Of Smoke
Patchy Smoke
Tuesday
81°F - Patchy Smoke
Clear
Tuesday Night
56°F - Clear
Sunny
Wednesday
85°F - Sunny
Clear
Wednesday Night
58°F - Clear
Sunny
Thursday
87°F - Sunny
Mostly Clear
Thursday Night
59°F - Mostly Clear
Sunny
Friday
87°F - Sunny
Partly Cloudy
Friday Night
58°F - Partly Cloudy
Sunny
Saturday
86°F - Sunny
Mostly Clear
Saturday Night
59°F - Mostly Clear
Sunny
Sunday
85°F - Sunny
Mostly Clear
Sunday Night
58°F - Mostly Clear

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:48 AM
Sunset: 6:46 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:40 PM
Moon Transit: 2:02 AM
Moonset: 9:07 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:32 AM - 4:02 AM
9:52 AM - 12:22 AM

Minor Periods

7:10 PM - 8:40 PM
8:37 AM - 10:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:48 AM
Sunset: 6:46 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:40 PM
Moon Transit: 2:02 AM
Moonset: 9:07 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:32 AM - 4:02 AM
9:52 AM - 12:22 AM

Minor Periods

7:10 PM - 8:40 PM
8:37 AM - 10:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:48 AM
Sunset: 6:46 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:40 PM
Moon Transit: 2:02 AM
Moonset: 9:07 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:32 AM - 4:02 AM
9:52 AM - 12:22 AM

Minor Periods

7:10 PM - 8:40 PM
8:37 AM - 10:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:48 AM
Sunset: 6:44 PM
Daylight: 11 hrs 52 mins
Moonrise: 8:17 PM
Moon Transit: 2:54 AM
Moonset: 10:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:24 AM - 4:54 AM
10:46 AM - 1:16 PM

Minor Periods

7:47 PM - 9:17 PM
9:51 AM - 11:21 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:48 AM
Sunset: 6:44 PM
Daylight: 11 hrs 52 mins
Moonrise: 8:17 PM
Moon Transit: 2:54 AM
Moonset: 10:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:24 AM - 4:54 AM
10:46 AM - 1:16 PM

Minor Periods

7:47 PM - 9:17 PM
9:51 AM - 11:21 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:48 AM
Sunset: 6:43 PM
Daylight: 11 hrs 50 mins
Moonrise: 9:03 PM
Moon Transit: 3:51 AM
Moonset: 11:35 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:21 AM - 5:51 AM
11:44 AM - 2:14 PM

Minor Periods

8:33 PM - 10:03 PM
11:05 AM - 12:35 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:48 AM
Sunset: 6:43 PM
Daylight: 11 hrs 50 mins
Moonrise: 9:03 PM
Moon Transit: 3:51 AM
Moonset: 11:35 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:21 AM - 5:51 AM
11:44 AM - 2:14 PM

Minor Periods

8:33 PM - 10:03 PM
11:05 AM - 12:35 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:47 AM
Sunset: 6:41 PM
Daylight: 11 hrs 47 mins
Moonrise: 9:58 PM
Moon Transit: 4:51 AM
Moonset: 12:46 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:21 AM - 6:51 AM
12:46 AM - 3:16 PM

Minor Periods

9:28 PM - 10:58 PM
12:16 AM - 1:46 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:47 AM
Sunset: 6:41 PM
Daylight: 11 hrs 47 mins
Moonrise: 9:58 PM
Moon Transit: 4:51 AM
Moonset: 12:46 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:21 AM - 6:51 AM
12:46 AM - 3:16 PM

Minor Periods

9:28 PM - 10:58 PM
12:16 AM - 1:46 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:47 AM
Sunset: 6:40 PM
Daylight: 11 hrs 45 mins
Moonrise: 11:03 PM
Moon Transit: 5:54 AM
Moonset: 1:50 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
1:49 PM - 4:19 PM

Minor Periods

12:00 AM - 12:00 AM
1:20 PM - 2:50 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:47 AM
Sunset: 6:40 PM
Daylight: 11 hrs 45 mins
Moonrise: 11:03 PM
Moon Transit: 5:54 AM
Moonset: 1:50 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
1:49 PM - 4:19 PM

Minor Periods

12:00 AM - 12:00 AM
1:20 PM - 2:50 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:47 AM
Sunset: 6:38 PM
Daylight: 11 hrs 42 mins
Moonrise: 12:03 AM
Moon Transit: 6:56 AM
Moonset: 2:44 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:26 AM - 8:56 AM
2:50 PM - 5:20 PM

Minor Periods

2:14 PM - 3:44 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:47 AM
Sunset: 6:38 PM
Daylight: 11 hrs 42 mins
Moonrise: 12:03 AM
Moon Transit: 6:56 AM
Moonset: 2:44 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:26 AM - 8:56 AM
2:50 PM - 5:20 PM

Minor Periods

2:14 PM - 3:44 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:46 AM
Sunset: 6:37 PM
Daylight: 11 hrs 40 mins
Moonrise: 12:15 AM
Moon Transit: 7:56 AM
Moonset: 3:28 PM
Moon Phase: Last Quarter
Moon Illumination: 32.9%

Best Times for Fishing or Hunting

Major Periods

7:26 AM - 9:56 AM
3:49 PM - 6:19 PM

Minor Periods

2:58 PM - 4:28 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:46 AM
Sunset: 6:37 PM
Daylight: 11 hrs 40 mins
Moonrise: 12:15 AM
Moon Transit: 7:56 AM
Moonset: 3:28 PM
Moon Phase: Last Quarter
Moon Illumination: 32.9%

Best Times for Fishing or Hunting

Major Periods

7:26 AM - 9:56 AM
3:49 PM - 6:19 PM

Minor Periods

2:58 PM - 4:28 PM
12:00 AM - 12:00 AM

Action Rating: 4 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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