Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

32.0°F

Measurement Time: Sunday, October 4, 2026, 6:31 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

86°F
Patchy Smoke
Patchy Smoke
23%
WSW 10 mph
44°F

Weather Forecast

Patchy Smoke
This Afternoon
87°F - Patchy Smoke
Patchy Smoke
Tonight
59°F - Patchy Smoke
Patchy Smoke
Monday
83°F - Patchy Smoke
Patchy Smoke then Mostly Clear
Monday Night
58°F - Patchy Smoke then Mostly Clear
Sunny
Tuesday
85°F - Sunny
Clear
Tuesday Night
59°F - Clear
Sunny
Wednesday
86°F - Sunny
Clear
Wednesday Night
59°F - Clear
Sunny
Thursday
86°F - Sunny
Mostly Clear
Thursday Night
59°F - Mostly Clear
Sunny
Friday
82°F - Sunny
Partly Cloudy
Friday Night
56°F - Partly Cloudy
Mostly Sunny
Saturday
73°F - Mostly Sunny
Partly Cloudy
Saturday Night
51°F - Partly Cloudy

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

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: 6:58 AM
Sun Transit: 12:46 AM
Sunset: 6:35 PM
Daylight: 11 hrs 38 mins
Moonrise: 1:28 AM
Moon Transit: 8:51 AM
Moonset: 4:04 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:21 AM - 10:51 AM
4:43 PM - 7:13 PM

Minor Periods

3:34 PM - 5:04 PM
12:58 AM - 2:28 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: 6:58 AM
Sun Transit: 12:46 AM
Sunset: 6:35 PM
Daylight: 11 hrs 38 mins
Moonrise: 1:28 AM
Moon Transit: 8:51 AM
Moonset: 4:04 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:21 AM - 10:51 AM
4:43 PM - 7:13 PM

Minor Periods

3:34 PM - 5:04 PM
12:58 AM - 2:28 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: 6:58 AM
Sun Transit: 12:46 AM
Sunset: 6:34 PM
Daylight: 11 hrs 35 mins
Moonrise: 2:40 AM
Moon Transit: 9:43 AM
Moonset: 4:35 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

5:33 PM - 8:03 PM
9:13 AM - 11:43 AM

Minor Periods

4:05 PM - 5:35 PM
2:10 AM - 3:40 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: 6:58 AM
Sun Transit: 12:46 AM
Sunset: 6:34 PM
Daylight: 11 hrs 35 mins
Moonrise: 2:40 AM
Moon Transit: 9:43 AM
Moonset: 4:35 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

5:33 PM - 8:03 PM
9:13 AM - 11:43 AM

Minor Periods

4:05 PM - 5:35 PM
2:10 AM - 3:40 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: 6:59 AM
Sun Transit: 12:45 AM
Sunset: 6:32 PM
Daylight: 11 hrs 33 mins
Moonrise: 3:50 AM
Moon Transit: 10:31 AM
Moonset: 5:01 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

6:20 PM - 8:50 PM
10:01 AM - 12:31 AM

Minor Periods

4:31 PM - 6:01 PM
3:20 AM - 4:50 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: 6:59 AM
Sun Transit: 12:45 AM
Sunset: 6:32 PM
Daylight: 11 hrs 33 mins
Moonrise: 3:50 AM
Moon Transit: 10:31 AM
Moonset: 5:01 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

6:20 PM - 8:50 PM
10:01 AM - 12:31 AM

Minor Periods

4:31 PM - 6:01 PM
3:20 AM - 4:50 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: 7:00 AM
Sun Transit: 12:45 AM
Sunset: 6:31 PM
Daylight: 11 hrs 31 mins
Moonrise: 4:57 AM
Moon Transit: 11:16 AM
Moonset: 5:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

7:05 PM - 9:35 PM
10:46 AM - 1:16 PM

Minor Periods

4:56 PM - 6:26 PM
4:27 AM - 5:57 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: 7:00 AM
Sun Transit: 12:45 AM
Sunset: 6:31 PM
Daylight: 11 hrs 31 mins
Moonrise: 4:57 AM
Moon Transit: 11:16 AM
Moonset: 5:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

7:05 PM - 9:35 PM
10:46 AM - 1:16 PM

Minor Periods

4:56 PM - 6:26 PM
4:27 AM - 5:57 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: 7:01 AM
Sun Transit: 12:45 AM
Sunset: 6:29 PM
Daylight: 11 hrs 28 mins
Moonrise: 6:03 AM
Moon Transit: 12:01 AM
Moonset: 5:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

7:50 PM - 10:20 PM
11:31 AM - 2:01 PM

Minor Periods

5:21 PM - 6:51 PM
5:33 AM - 7:03 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: 7:01 AM
Sun Transit: 12:45 AM
Sunset: 6:29 PM
Daylight: 11 hrs 28 mins
Moonrise: 6:03 AM
Moon Transit: 12:01 AM
Moonset: 5:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

7:50 PM - 10:20 PM
11:31 AM - 2:01 PM

Minor Periods

5:21 PM - 6:51 PM
5:33 AM - 7:03 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: 7:02 AM
Sun Transit: 12:45 AM
Sunset: 6:28 PM
Daylight: 11 hrs 26 mins
Moonrise: 7:08 AM
Moon Transit: 12:46 AM
Moonset: 6:16 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

8:35 PM - 11:05 PM
12:16 AM - 2:46 PM

Minor Periods

5:46 PM - 7:16 PM
6:38 AM - 8:08 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: 7:02 AM
Sun Transit: 12:45 AM
Sunset: 6:28 PM
Daylight: 11 hrs 26 mins
Moonrise: 7:08 AM
Moon Transit: 12:46 AM
Moonset: 6:16 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

8:35 PM - 11:05 PM
12:16 AM - 2:46 PM

Minor Periods

5:46 PM - 7:16 PM
6:38 AM - 8:08 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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