Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

37.8°F

Measurement Time: Sunday, November 23, 2025, 3:30 AM PST

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

44.8°F
Sunny
Conditions: Sunny
Humidity: 53%
Feels Like: 44.7°F
Wind: W 2.2 mph
Wind Gusts: 2.4 mph
Pressure: 30.18 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 2.9

Five Day Weather Forecast

Sunny
Sun
H: 46°F
L: 28°F
Sunny
Mon
H: 47°F
L: 37°F
Sunny
Tue
H: 50°F
L: 36°F
Sunny
Wed
H: 51°F
L: 36°F
Sunny
Thu
H: 52°F
L: 39°F

Air Quality

AQI: 1 - Good
PM2.5: 6.05 μg/m3
PM10: 6.35 μg/m3
Carbon Monoxide: 129.85 μg/m3
Nitrogen Dioxide: 6.95 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 68 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 11:44 AM
Sunset: 4:42 PM
Daylight: 9 hrs 55 mins
Moonrise: 10:06 AM
Moon Transit: 2:39 PM
Moonset: 7:15 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:09 PM - 4:39 PM

Minor Periods

6:45 PM - 8:15 PM
9:36 AM - 11:06 AM

Action Rating: 3 out of 5

Dense Fog Advisory issued November 22 at 10:14PM PST until November 23 at 11:00AM PST by NWS Sacramento CA

Effective: Sat November 22, 2025, 10:14 PM
Expires: Sun November 23, 2025, 11:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Carquinez Strait and Delta, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...From 3 AM to 11 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued November 22 at 10:02PM PST until November 23 at 10:00AM PST by NWS Hanford CA

Effective: Sat November 22, 2025, 10:02 PM
Expires: Sun November 23, 2025, 6:15 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Bakersfield, Buttonwillow - Lost Hills - I5, Caruthers - San Joaquin - Selma, Delano-Wasco-Shafter, Fresno-Clovis, Hanford - Corcoran - Lemoore, Los Banos - Dos Palos, Merced - Madera - Mendota, and West Side of Fresno and Kings Counties. * WHEN...From 3 AM to 10 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to, Interstate 5, as well as California State Routes 99, 33, 41, 43, 46, 59, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued November 23 at 3:47AM PST until November 23 at 10:00AM PST by NWS Hanford CA

Effective: Sun November 23, 2025, 3:47 AM
Expires: Sun November 23, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Bakersfield, Buttonwillow - Lost Hills - I5, Caruthers - San Joaquin - Selma, Delano-Wasco-Shafter, Fresno-Clovis, Hanford - Corcoran - Lemoore, Los Banos - Dos Palos, Merced - Madera - Mendota, and West Side of Fresno and Kings Counties. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to, Interstate 5, as well as California State Routes 99, 33, 41, 43, 46, 59, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued November 23 at 9:55AM PST until November 23 at 11:00AM PST by NWS Hanford CA

Effective: Sun November 23, 2025, 9:55 AM
Expires: Sun November 23, 2025, 11:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Bakersfield, Buttonwillow - Lost Hills - I5, Caruthers - San Joaquin - Selma, Delano-Wasco-Shafter, Fresno-Clovis, Hanford - Corcoran - Lemoore, Los Banos - Dos Palos, Merced - Madera - Mendota, and West Side of Fresno and Kings Counties. * WHEN...Until 11 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to, Interstate 5, as well as California State Routes 99, 33, 41, 43, 46, 59, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Sunday, November 23, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 36°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 3.45 μg/m3
PM10: 3.7 μg/m3
Carbon Monoxide: 126.89 μg/m3
Nitrogen Dioxide: 3.41 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 75.96 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 11:44 AM
Sunset: 4:42 PM
Daylight: 9 hrs 55 mins
Moonrise: 10:06 AM
Moon Transit: 2:39 PM
Moonset: 7:15 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:09 PM - 4:39 PM

Minor Periods

6:45 PM - 8:15 PM
9:36 AM - 11:06 AM

Action Rating: 3 out of 5

Monday, November 24, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 40.5°F
Average Humidity: 36%
Chance of Rain: 0%
Wind: 8.5 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 3.49 μg/m3
PM10: 3.68 μg/m3
Carbon Monoxide: 116.09 μg/m3
Nitrogen Dioxide: 4.64 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 74.96 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 11:45 AM
Sunset: 4:42 PM
Daylight: 9 hrs 53 mins
Moonrise: 10:49 AM
Moon Transit: 3:30 PM
Moonset: 8:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:00 PM - 5:30 PM

Minor Periods

7:47 PM - 9:17 PM
10:19 AM - 11:49 AM

Action Rating: 2 out of 5

Tuesday, November 25, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 41.9°F
Average Humidity: 40%
Chance of Rain: 0%
Wind: 8.5 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 2.86 μg/m3
PM10: 3.15 μg/m3
Carbon Monoxide: 112.45 μg/m3
Nitrogen Dioxide: 4.58 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 78.92 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 11:45 AM
Sunset: 4:41 PM
Daylight: 9 hrs 52 mins
Moonrise: 11:24 AM
Moon Transit: 4:19 PM
Moonset: 9:21 PM
Moon Phase: Waxing Crescent
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:49 PM - 6:19 PM

Minor Periods

8:51 PM - 10:21 PM
10:54 AM - 12:24 AM

Action Rating: 2 out of 5

Wednesday, November 26, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 41.3°F
Average Humidity: 50%
Chance of Rain: 0%
Wind: 8.1 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 2.8 μg/m3
PM10: 3 μg/m3
Carbon Monoxide: 107.81 μg/m3
Nitrogen Dioxide: 4.63 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 77.6 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 11:45 AM
Sunset: 4:41 PM
Daylight: 9 hrs 51 mins
Moonrise: 11:55 AM
Moon Transit: 5:06 PM
Moonset: 10:26 PM
Moon Phase: First Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

12:08 AM - 2:38 AM
4:36 PM - 7:06 PM

Minor Periods

9:56 PM - 11:26 PM
11:25 AM - 12:55 AM

Action Rating: 3 out of 5

Thursday, November 27, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 42.2°F
Average Humidity: 42%
Chance of Rain: 0%
Wind: 6.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 3.23 μg/m3
PM10: 3.37 μg/m3
Carbon Monoxide: 134.16 μg/m3
Nitrogen Dioxide: 6.23 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 67.54 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 11:46 AM
Sunset: 4:41 PM
Daylight: 9 hrs 49 mins
Moonrise: 12:22 AM
Moon Transit: 5:52 PM
Moonset: 11:31 PM
Moon Phase: First Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

12:55 AM - 3:25 AM
5:22 PM - 7:52 PM

Minor Periods

12:00 AM - 12:00 AM
11:52 AM - 1:22 PM

Action Rating: 2 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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