Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

53.6°F

Measurement Time: Monday, July 20, 2026, 10:00 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 NR HETCH HETCHY CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,484 feet

Nearest Address:
Hetch Hetchy Road
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.93742147, -119.7982326

Nearby Water Temperatures

Cherry Creek, Groveland, CA (6.8 mi)
Tuolumne River, Groveland, CA (7.7 mi)
Tuolumne River, Groveland, CA (9.1 mi)
Tuolumne River, Groveland, CA (10.1 mi)
Merced River, Yosemite Valley, CA (19.3 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (44.2 mi)
Deadman Creek, Mammoth Lakes, CA (48.6 mi)
Hot Creek, Mammoth Lakes, CA (55.1 mi)
Hot Creek, Mammoth Lakes, CA (55.6 mi)
Hot Creek, Mammoth Lakes, CA (56.7 mi)
San Joaquin River, Friant, CA (66 mi)
Trout Creek, South Lake Tahoe, CA (68.5 mi)
Upper Truckee River, South Lake Tahoe, CA (68.9 mi)
Walker Lake, Walker Lake, NV (78.6 mi)
General Creek, Tahoma, CA (78.9 mi)

Weather for Groveland, California

Current Weather

57.7°F
Partly Cloudy
Partly Cloudy
48.6°F
57.7°F
57%
ENE 3.4 mph
7 mph
58.1°F
42.4°F
0 in
48%
6 mi
1018 mbar
0

Five Day Weather Forecast

Partly Cloudy
Tue
H: 76°F
L: 56°F
Sunny
Wed
H: 77°F
L: 53°F
Sunny
Thu
H: 80°F
L: 54°F
Sunny
Fri
H: 80°F
L: 54°F
Sunny
Sat
H: 79°F
L: 54°F

Air Quality

AQI: 1 - Good
PM2.5: 1.9 μg/m3
PM10: 2.4 μg/m3
Carbon Monoxide: 92 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 62 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:05 PM
Sunset: 8:18 PM
Daylight: 14 hrs 24 mins
Moonrise: 1:56 PM
Moon Transit: 7:09 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

2:11 AM - 4:41 AM
6:39 PM - 9:09 PM

Minor Periods

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

Action Rating: 2 out of 5

Flood Watch issued July 21 at 2:58AM PDT until July 21 at 11:00PM PDT by NWS Reno NV

Effective: Tue July 21, 2026, 2:58 AM
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...From noon PDT today through 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

Partly Cloudy
75.5°F
55.8°F
64.4°F
44%
0.02 in
36%
0%
9.6 mph
10.9


Air Quality

AQI: 1 - Good
PM2.5: 3.93 μg/m3
PM10: 5.2 μg/m3
Carbon Monoxide: 92.58 μg/m3
Nitrogen Dioxide: 1.94 μg/m3
Sulphur Dioxide: 0.33 μg/m3
Ozone: 72.25 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:05 PM
Sunset: 8:18 PM
Daylight: 14 hrs 24 mins
Moonrise: 1:56 PM
Moon Transit: 7:09 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

2:11 AM - 4:41 AM
6:39 PM - 9:09 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
77.2°F
52.7°F
64.3°F
46%
0 in
1%
0%
13.4 mph
12


Air Quality

AQI: 1 - Good
PM2.5: 4.15 μg/m3
PM10: 4.88 μg/m3
Carbon Monoxide: 91.54 μg/m3
Nitrogen Dioxide: 2.14 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 62.54 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:05 PM
Sunset: 8:17 PM
Daylight: 14 hrs 23 mins
Moonrise: 2:59 PM
Moon Transit: 7:55 PM
Moonset: 12:16 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

2:56 AM - 5:26 AM
7:25 PM - 9:55 PM

Minor Periods

2:29 PM - 3:59 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
79.9°F
53.6°F
65.8°F
41%
0 in
1%
0%
14.1 mph
12.8


Air Quality

AQI: 1 - Good
PM2.5: 4.01 μg/m3
PM10: 4.59 μg/m3
Carbon Monoxide: 90.04 μg/m3
Nitrogen Dioxide: 1.7 μg/m3
Sulphur Dioxide: 0.59 μg/m3
Ozone: 74.63 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:05 PM
Sunset: 8:16 PM
Daylight: 14 hrs 21 mins
Moonrise: 4:00 PM
Moon Transit: 8:43 PM
Moonset: 12:47 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

3:30 PM - 5:00 PM
12:17 AM - 1:47 AM

Action Rating: 4 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
80.2°F
53.8°F
66.5°F
32%
0 in
1%
0%
13.4 mph
12.4


Air Quality

AQI: 1 - Good
PM2.5: 3.51 μg/m3
PM10: 4.38 μg/m3
Carbon Monoxide: 94.42 μg/m3
Nitrogen Dioxide: 1.58 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 88.29 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 1:05 PM
Sunset: 8:15 PM
Daylight: 14 hrs 19 mins
Moonrise: 5:00 PM
Moon Transit: 9:33 PM
Moonset: 1:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:31 AM - 7:01 AM
9:03 PM - 11:33 PM

Minor Periods

4:30 PM - 6:00 PM
12:52 AM - 2:22 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
79.4°F
53.8°F
65.8°F
34%
0 in
1%
0%
13.2 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 3.75 μg/m3
PM10: 4.92 μg/m3
Carbon Monoxide: 110.67 μg/m3
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 80.33 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:05 PM
Sunset: 8:15 PM
Daylight: 14 hrs 18 mins
Moonrise: 5:55 PM
Moon Transit: 10:24 PM
Moonset: 2:06 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

5:25 PM - 6:55 PM
1:36 AM - 3:06 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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