Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

63.5°F

Measurement Time: Sunday, July 20, 2025, 9:30 AM PDT

Temperature Locations

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Local Points of Interest

Happy Isles Bridge; Yosemite National Park

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Merced River

Station Name: MERCED R A HAPPY ISLES BRIDGE NR YOSEMITE CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 4,094 feet / 1,248 meters

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

71.9°F
Sunny
Conditions: Sunny
Humidity: 40%
Feels Like: 75.3°F
Wind: WSW 11 mph
Wind Gusts: 12.6 mph
Pressure: 29.95 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 3.3

Five Day Weather Forecast

Sunny
Sun
H: 74°F
L: 60°F
Sunny
Mon
H: 68°F
L: 51°F
Sunny
Tue
H: 64°F
L: 51°F
Partly Cloudy
Wed
H: 64°F
L: 50°F
Sunny
Thu
H: 68°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 10.18 μg/m3
PM10: 10.55 μg/m3
Carbon Monoxide: 236.8 μg/m3
Nitrogen Dioxide: 8.51 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 109 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:04 PM
Sunset: 8:17 PM
Daylight: 14 hrs 24 mins
Moonrise: 1:24 AM
Moon Transit: 9:04 AM
Moonset: 4:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

8:34 AM - 11:04 AM
4:58 PM - 7:28 PM

Minor Periods

4:24 PM - 5:54 PM
12:54 AM - 2:24 AM

Action Rating: 2 out of 5

Lake Wind Advisory issued July 20 at 1:46AM PDT until July 20 at 11:00PM PDT by NWS Reno NV

Effective: Sun July 20, 2025, 1:46 AM
Expires: Mon July 21, 2025, 11:00 AM

* WHAT...For the first Lake Wind Advisory, west winds 15 to 20 mph with gusts up to 30 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. For the second Lake Wind Advisory, west winds 20 to 25 mph with gusts up to 35 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. * WHERE...Greater Lake Tahoe Area, and Western Nevada Basin and Range including Pyramid Lake. * WHEN...For the first Lake Wind Advisory, from 2 PM this afternoon to 11 PM PDT this evening. For the second Lake Wind Advisory, from 11 AM to 11 PM PDT Monday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.


Lake Wind Advisory issued July 20 at 1:46AM PDT until July 21 at 11:00PM PDT by NWS Reno NV

Effective: Sun July 20, 2025, 1:46 AM
Expires: Mon July 21, 2025, 11:00 AM

* WHAT...For the first Lake Wind Advisory, west winds 15 to 20 mph with gusts up to 30 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. For the second Lake Wind Advisory, west winds 20 to 25 mph with gusts up to 35 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. * WHERE...Greater Lake Tahoe Area, and Western Nevada Basin and Range including Pyramid Lake. * WHEN...For the first Lake Wind Advisory, from 2 PM this afternoon to 11 PM PDT this evening. For the second Lake Wind Advisory, from 11 AM to 11 PM PDT Monday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.


Lake Wind Advisory issued July 20 at 1:46AM PDT until July 20 at 11:00PM PDT by NWS Reno NV

Effective: Sun July 20, 2025, 1:46 AM
Expires: Mon July 21, 2025, 11:00 AM

* WHAT...For the first Lake Wind Advisory, west winds 15 to 20 mph with gusts up to 30 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. For the second Lake Wind Advisory, west winds 20 to 25 mph with gusts up to 35 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. * WHERE...Greater Lake Tahoe Area, and Western Nevada Basin and Range including Pyramid Lake. * WHEN...For the first Lake Wind Advisory, from 2 PM this afternoon to 11 PM PDT this evening. For the second Lake Wind Advisory, from 11 AM to 11 PM PDT Monday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.


Lake Wind Advisory issued July 20 at 1:46AM PDT until July 21 at 11:00PM PDT by NWS Reno NV

Effective: Sun July 20, 2025, 1:46 AM
Expires: Mon July 21, 2025, 11:00 AM

* WHAT...For the first Lake Wind Advisory, west winds 15 to 20 mph with gusts up to 30 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. For the second Lake Wind Advisory, west winds 20 to 25 mph with gusts up to 35 mph and wave heights of 1 to 3 feet on Lake Tahoe and Pyramid Lake. * WHERE...Greater Lake Tahoe Area, and Western Nevada Basin and Range including Pyramid Lake. * WHEN...For the first Lake Wind Advisory, from 2 PM this afternoon to 11 PM PDT this evening. For the second Lake Wind Advisory, from 11 AM to 11 PM PDT Monday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.
Sunday, July 20, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 66.9°F
Average Humidity: 42%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 10.99 μg/m3
PM10: 11.88 μg/m3
Carbon Monoxide: 260.04 μg/m3
Nitrogen Dioxide: 4.17 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 120.68 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:04 PM
Sunset: 8:17 PM
Daylight: 14 hrs 24 mins
Moonrise: 1:24 AM
Moon Transit: 9:04 AM
Moonset: 4:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

8:34 AM - 11:04 AM
4:58 PM - 7:28 PM

Minor Periods

4:24 PM - 5:54 PM
12:54 AM - 2:24 AM

Action Rating: 2 out of 5

Monday, July 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 60.1°F
Average Humidity: 45%
Chance of Rain: 0%
Wind: 12.3 mph
UV Index: 3.1

Air Quality

AQI: 1 - Good
PM2.5: 7.43 μg/m3
PM10: 7.87 μg/m3
Carbon Monoxide: 207.13 μg/m3
Nitrogen Dioxide: 3.58 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 122.6 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:04 PM
Sunset: 8:16 PM
Daylight: 14 hrs 23 mins
Moonrise: 2:13 AM
Moon Transit: 10:07 AM
Moonset: 6:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

6:01 PM - 8:31 PM
9:37 AM - 12:07 AM

Minor Periods

5:35 PM - 7:05 PM
1:43 AM - 3:13 AM

Action Rating: 3 out of 5

Tuesday, July 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 56.5°F
Average Humidity: 52%
Chance of Rain: 0%
Wind: 11.2 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 7.41 μg/m3
PM10: 8.35 μg/m3
Carbon Monoxide: 206.53 μg/m3
Nitrogen Dioxide: 4.08 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 93.88 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:04 PM
Sunset: 8:15 PM
Daylight: 14 hrs 21 mins
Moonrise: 3:12 AM
Moon Transit: 11:10 AM
Moonset: 7:07 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

7:05 PM - 9:35 PM
10:40 AM - 1:10 PM

Minor Periods

6:37 PM - 8:07 PM
2:42 AM - 4:12 AM

Action Rating: 3 out of 5

Wednesday, July 23, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 54.1°F
Average Humidity: 45%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 9.46 μg/m3
PM10: 10.29 μg/m3
Carbon Monoxide: 216.67 μg/m3
Nitrogen Dioxide: 4.62 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 95.8 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:04 PM
Sunset: 8:14 PM
Daylight: 14 hrs 20 mins
Moonrise: 4:20 AM
Moon Transit: 12:12 AM
Moonset: 7:58 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

8:06 PM - 10:36 PM
11:42 AM - 2:12 PM

Minor Periods

7:28 PM - 8:58 PM
3:50 AM - 5:20 AM

Action Rating: 3 out of 5

Thursday, July 24, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 57.6°F
Average Humidity: 45%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 13.52 μg/m3
PM10: 14.43 μg/m3
Carbon Monoxide: 301.12 μg/m3
Nitrogen Dioxide: 6.59 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 95.08 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 1:04 PM
Sunset: 8:14 PM
Daylight: 14 hrs 18 mins
Moonrise: 5:32 AM
Moon Transit: 1:10 PM
Moonset: 8:39 PM
Moon Phase: New
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

9:02 PM - 11:32 PM
12:40 AM - 3:10 PM

Minor Periods

8:09 PM - 9:39 PM
5:02 AM - 6:32 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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