Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

69.1°F

Measurement Time: Tuesday, July 21, 2026, 2:45 PM PDT

Temperature Locations

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Local Points of Interest

Hetch Hetchy Reservoir; Yosemite National Park; White Wolf, CA

Tuolumne River

Station Name: TUOLUMNE R A GRAND CYN OF TUOLUMNE AB HETCH HETCHY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,842 feet

Nearest Address:
White Wolf Road
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.9165884, -119.6598938

Nearby Water Temperatures

Tuolumne River, Groveland, CA (7.7 mi)
Merced River, Yosemite Valley, CA (13.9 mi)
Cherry Creek, Groveland, CA (14.5 mi)
Tuolumne River, Groveland, CA (15.9 mi)
Tuolumne River, Groveland, CA (17.1 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (37 mi)
Deadman Creek, Mammoth Lakes, CA (41 mi)
Hot Creek, Mammoth Lakes, CA (47.6 mi)
Hot Creek, Mammoth Lakes, CA (48.1 mi)
Hot Creek, Mammoth Lakes, CA (49.1 mi)
San Joaquin River, Friant, CA (64.5 mi)
Trout Creek, South Lake Tahoe, CA (71.4 mi)
Upper Truckee River, South Lake Tahoe, CA (71.8 mi)
Walker Lake, Walker Lake, NV (74.3 mi)
Walker Lake, Walker Lake, NV (76.8 mi)

Weather for Groveland, California

Current Weather

55.4°F
Clear
Clear
48.2°F
55.3°F
64%
E 4 mph
8.5 mph
55°F
43.3°F
0 in
6%
6 mi
1020 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 73°F
L: 55°F
Sunny
Wed
H: 76°F
L: 53°F
Sunny
Thu
H: 80°F
L: 54°F
Sunny
Fri
H: 81°F
L: 57°F
Sunny
Sat
H: 80°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 5.9 μg/m3
PM10: 7.2 μg/m3
Carbon Monoxide: 93 μg/m3
Nitrogen Dioxide: 2.8 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:05 PM
Sunset: 8:17 PM
Daylight: 14 hrs 24 mins
Moonrise: 1:56 PM
Moon Transit: 7:08 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

2:12 AM - 4:42 AM
6:38 PM - 9:08 PM

Minor Periods

1:26 PM - 2:56 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Flood Advisory issued July 21 at 12:16PM PDT until July 21 at 3:15PM PDT by NWS Reno NV

Effective: Tue July 21, 2026, 12:16 PM
Expires: Tue July 21, 2026, 3:15 PM

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of Mono county in east central California, including Twin Lakes. * WHEN...Until 315 PM PDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 1212 PM PDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. 0.25 to 0.5 inches of rain have fallen. - Some locations that will experience flooding include... Twin Lakes. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.


Flood Watch issued July 21 at 3:40PM PDT until July 21 at 11:00PM PDT by NWS Reno NV

Effective: Tue July 21, 2026, 3:40 PM
Expires: Tue July 21, 2026, 11:00 PM

* WHAT...Flash flooding caused by excessive rainfall is possible due to thunderstorms. * WHERE...Portions of east central California, including the following areas, Greater Lake Tahoe Area and Mono County and western Nevada, including the following areas, Greater Lake Tahoe Area, Greater Reno-Carson City-Minden Area and Mineral and Southern Lyon Counties. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, urban areas, burn scars, and areas near steep terrain. * ADDITIONAL DETAILS... - Deeper monsoonal moisture combined with daytime heating will produce scattered thunderstorms this afternoon and evening. Slower moving storms could redevelop over similar areas, increasing the risk for heavy rainfall capable of producing flash flooding. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Tuesday, July 21, 2026

Weather Forecast

Patchy rain nearby
72.8°F
55.2°F
63.4°F
54%
0.13 in
57%
0%
10.7 mph
10.9


Air Quality

AQI: 1 - Good
PM2.5: 6.05 μg/m3
PM10: 9.22 μg/m3
Carbon Monoxide: 94.04 μg/m3
Nitrogen Dioxide: 1.39 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 84.08 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:05 PM
Sunset: 8:17 PM
Daylight: 14 hrs 24 mins
Moonrise: 1:56 PM
Moon Transit: 7:08 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

2:12 AM - 4:42 AM
6:38 PM - 9:08 PM

Minor Periods

1:26 PM - 2:56 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
76.3°F
52.8°F
63.5°F
53%
0 in
2%
0%
12.1 mph
12


Air Quality

AQI: 1 - Good
PM2.5: 5.79 μg/m3
PM10: 8.56 μg/m3
Carbon Monoxide: 92.71 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 0.63 μg/m3
Ozone: 73.04 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:05 PM
Sunset: 8:16 PM
Daylight: 14 hrs 22 mins
Moonrise: 2:58 PM
Moon Transit: 7:54 PM
Moonset: 12:15 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

2:56 AM - 5:26 AM
7:24 PM - 9:54 PM

Minor Periods

2:28 PM - 3:58 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
80.3°F
53.5°F
66.3°F
42%
0 in
1%
0%
12.3 mph
12.8


Air Quality

AQI: 1 - Good
PM2.5: 4.84 μg/m3
PM10: 6.63 μg/m3
Carbon Monoxide: 90.42 μg/m3
Nitrogen Dioxide: 2.16 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 74.83 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:05 PM
Sunset: 8:15 PM
Daylight: 14 hrs 21 mins
Moonrise: 4:00 PM
Moon Transit: 8:42 PM
Moonset: 12:46 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

3:43 AM - 6:13 AM
8:12 PM - 10:42 PM

Minor Periods

3:30 PM - 5:00 PM
12:16 AM - 1:46 AM

Action Rating: 4 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
81.1°F
56.6°F
68°F
33%
0 in
1%
0%
13.2 mph
12.4


Air Quality

AQI: 1 - Good
PM2.5: 3.82 μg/m3
PM10: 5.46 μg/m3
Carbon Monoxide: 88.71 μg/m3
Nitrogen Dioxide: 1.61 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 92 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:05 PM
Sunset: 8:15 PM
Daylight: 14 hrs 19 mins
Moonrise: 4:59 PM
Moon Transit: 9:32 PM
Moonset: 1:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:32 AM - 7:02 AM
9:02 PM - 11:32 PM

Minor Periods

4:29 PM - 5:59 PM
12:52 AM - 2:22 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
79.5°F
56.1°F
66.8°F
38%
0 in
1%
0%
12.5 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 3.76 μg/m3
PM10: 4.57 μg/m3
Carbon Monoxide: 96.83 μg/m3
Nitrogen Dioxide: 1.3 μg/m3
Sulphur Dioxide: 0.59 μg/m3
Ozone: 105.92 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 1:05 PM
Sunset: 8:14 PM
Daylight: 14 hrs 18 mins
Moonrise: 5:54 PM
Moon Transit: 10:24 PM
Moonset: 2:05 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
12:00 AM - 12:00 AM

Minor Periods

5:24 PM - 6:54 PM
1:35 AM - 3:05 AM

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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