Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

34.7°F

Measurement Time: Friday, February 13, 2026, 4:30 AM PST

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

32.4°F
Sunny
Sunny
28.7°F
42.7°F
69%
W 3.8 mph
5.1 mph
39.7°F
25.4°F
0 in
0%
9 mi
1020 mbar
3.7

Five Day Weather Forecast

Sunny
Fri
H: 44°F
L: 24°F
Overcast
Sat
H: 41°F
L: 24°F
Partly Cloudy
Sun
H: 40°F
L: 28°F
Moderate or heavy snow showers
Mon
H: 29°F
L: 20°F
Moderate or heavy snow in area with thunder
Tue
H: 20°F
L: 16°F

Air Quality

AQI: 1 - Good
PM2.5: 5.05 μg/m3
PM10: 5.95 μg/m3
Carbon Monoxide: 133.85 μg/m3
Nitrogen Dioxide: 6.35 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 83 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:12 AM
Sunset: 5:35 PM
Daylight: 10 hrs 45 mins
Moonrise: 4:40 AM
Moon Transit: 9:12 AM
Moonset: 1:47 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

8:42 AM - 11:12 AM
5:03 PM - 7:33 PM

Minor Periods

1:17 PM - 2:47 PM
4:10 AM - 5:40 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued February 12 at 10:05PM PST until February 14 at 10:00AM PST by NWS Hanford CA

Effective: Thu February 12, 2026, 10:05 PM
Expires: Fri February 13, 2026, 7:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. Worst case scenario with visibility down to zero. * WHERE...A portion of central California. * WHEN...Until 10 AM PST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 180 and 198.

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


Dense Fog Advisory issued February 13 at 6:45AM PST until February 14 at 10:00AM PST by NWS Hanford CA

Effective: Fri February 13, 2026, 6:45 AM
Expires: Fri February 13, 2026, 2:45 PM

* WHAT...Visibility one quarter mile or less in dense fog. Worst case scenario with visibility down to zero. * WHERE...A portion of central California. * WHEN...Until 10 AM PST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 180 and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Friday, February 13, 2026

Weather Forecast

Sunny
43.9°F
23.5°F
32.3°F
68%
0 in
0%
0%
9.6 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 3.05 μg/m3
PM10: 3.93 μg/m3
Carbon Monoxide: 133.93 μg/m3
Nitrogen Dioxide: 2.89 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 91.4 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:12 AM
Sunset: 5:35 PM
Daylight: 10 hrs 45 mins
Moonrise: 4:40 AM
Moon Transit: 9:12 AM
Moonset: 1:47 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

8:42 AM - 11:12 AM
5:03 PM - 7:33 PM

Minor Periods

1:17 PM - 2:47 PM
4:10 AM - 5:40 AM

Action Rating: 2 out of 5

Saturday, February 14, 2026

Weather Forecast

Overcast
41.4°F
24.1°F
34.2°F
63%
0 in
0%
0%
8.5 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 4.37 μg/m3
PM10: 5.51 μg/m3
Carbon Monoxide: 138.77 μg/m3
Nitrogen Dioxide: 3.52 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 95.12 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:12 AM
Sunset: 5:36 PM
Daylight: 10 hrs 47 mins
Moonrise: 5:22 AM
Moon Transit: 10:03 AM
Moonset: 2:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

5:54 PM - 8:24 PM
9:33 AM - 12:03 AM

Minor Periods

2:21 PM - 3:51 PM
4:52 AM - 6:22 AM

Action Rating: 4 out of 5

Sunday, February 15, 2026

Weather Forecast

Partly Cloudy
40.1°F
28.4°F
33.2°F
51%
0 in
0%
0%
9.6 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 6.45 μg/m3
PM10: 8.59 μg/m3
Carbon Monoxide: 140.37 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 100.68 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:12 AM
Sunset: 5:37 PM
Daylight: 10 hrs 50 mins
Moonrise: 5:59 AM
Moon Transit: 10:54 AM
Moonset: 3:56 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

6:44 PM - 9:14 PM
10:24 AM - 12:54 AM

Minor Periods

3:26 PM - 4:56 PM
5:29 AM - 6:59 AM

Action Rating: 3 out of 5

Monday, February 16, 2026

Weather Forecast

Moderate or heavy snow showers
28.8°F
19.5°F
25.2°F
86%
3.06 in
85%
32%
17.7 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 4.43 μg/m3
Carbon Monoxide: 131.46 μg/m3
Nitrogen Dioxide: 2.98 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 96.6 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:12 AM
Sunset: 5:38 PM
Daylight: 10 hrs 52 mins
Moonrise: 6:30 AM
Moon Transit: 11:42 AM
Moonset: 5:03 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

7:31 PM - 10:01 PM
11:12 AM - 1:42 PM

Minor Periods

4:33 PM - 6:03 PM
6:00 AM - 7:30 AM

Action Rating: 4 out of 5

Tuesday, February 17, 2026

Weather Forecast

Moderate or heavy snow in area with thunder
19.5°F
16.2°F
17.9°F
99%
2.43 in
69%
64%
20.6 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 1.3 μg/m3
PM10: 1.46 μg/m3
Carbon Monoxide: 140.77 μg/m3
Nitrogen Dioxide: 2.4 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 96.62 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:12 AM
Sunset: 5:40 PM
Daylight: 10 hrs 54 mins
Moonrise: 6:58 AM
Moon Transit: 12:29 AM
Moonset: 6:10 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

8:18 PM - 10:48 PM
11:59 AM - 2:29 PM

Minor Periods

5:40 PM - 7:10 PM
6:28 AM - 7:58 AM

Action Rating: 5 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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