Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

51.6°F

Measurement Time: Sunday, October 11, 2026, 7:00 AM 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

49.5°F

Conditions: Sunny
Humidity: 45%
Feels Like: 43.5°F
Wind: SSW 13.2 mph
Wind Gusts: 22.6 mph

Pressure: 29.52 in
Precipitation: 0 in
Cloud Cover: 5%
Visibility: 6 mi
UV Index: 0.8

Weather Forecast

Sun
H: 51°F
L: 28°F

Mon
H: 43°F
L: 23°F

Tue
H: 54°F
L: 20°F

Wed
H: 62°F
L: 33°F

Thu
H: 68°F
L: 38°F

Air Quality

AQI: 1 - Good

PM2.5: 5.7 μg/m3

PM10: 9.8 μg/m3

Carbon Monoxide: 115 μg/m3
Nitrogen Dioxide: 0.5 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 99 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:45 AM
Sunset: 6:27 PM
Daylight: 11 hrs 23 mins

Moonrise: 8:14 AM
Moon Transit: 1:33 PM
Moonset: 6:44 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

9:20 PM - 11:50 PM
1:03 PM - 3:33 PM

Minor Periods

6:14 PM - 7:44 PM
7:44 AM - 9:14 AM

Action Rating: 4 out of 5

Sunday, October 11, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 39.5°F
Average Humidity: 68%

Chance of Rain: 22%
Wind: 13.6 mph
UV Index: 0.9

Air Quality

AQI: 1 - Good

PM2.5: 5.48 μg/m3

PM10: 11.05 μg/m3

Carbon Monoxide: 117.88 μg/m3
Nitrogen Dioxide: 1.03 μg/m3
Sulphur Dioxide: 0.43 μg/m3
Ozone: 88.71 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:45 AM
Sunset: 6:27 PM
Daylight: 11 hrs 23 mins

Moonrise: 8:14 AM
Moon Transit: 1:33 PM
Moonset: 6:44 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

9:20 PM - 11:50 PM
1:03 PM - 3:33 PM

Minor Periods

6:14 PM - 7:44 PM
7:44 AM - 9:14 AM

Action Rating: 4 out of 5

Monday, October 12, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 31.3°F
Average Humidity: 77%

Chance of Rain: 61%
Wind: 10.5 mph
UV Index: 1.3

Air Quality

AQI: 1 - Good

PM2.5: 4.83 μg/m3

PM10: 14.24 μg/m3

Carbon Monoxide: 109 μg/m3
Nitrogen Dioxide: 0.65 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 94.46 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:45 AM
Sunset: 6:26 PM
Daylight: 11 hrs 21 mins

Moonrise: 9:19 AM
Moon Transit: 2:20 PM
Moonset: 7:15 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:50 PM - 4:20 PM

Minor Periods

6:45 PM - 8:15 PM
8:49 AM - 10:19 AM

Action Rating: 4 out of 5

Tuesday, October 13, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 34.7°F
Average Humidity: 50%

Chance of Rain: 2%
Wind: 9.4 mph
UV Index: 4

Air Quality

AQI: 1 - Good

PM2.5: 1.17 μg/m3

PM10: 1.82 μg/m3

Carbon Monoxide: 106.54 μg/m3
Nitrogen Dioxide: 1.23 μg/m3
Sulphur Dioxide: 0.12 μg/m3
Ozone: 88.71 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:45 AM
Sunset: 6:24 PM
Daylight: 11 hrs 18 mins

Moonrise: 10:23 AM
Moon Transit: 3:09 PM
Moonset: 7:52 PM
Moon Phase: New
Moon Illumination: 4.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:39 PM - 5:09 PM

Minor Periods

7:22 PM - 8:52 PM
9:53 AM - 11:23 AM

Action Rating: 3 out of 5

Wednesday, October 14, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 44.9°F
Average Humidity: 20%

Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 5

Air Quality

AQI: 1 - Good

PM2.5: 1.75 μg/m3

PM10: 3.18 μg/m3

Carbon Monoxide: 108.24 μg/m3
Nitrogen Dioxide: 1.58 μg/m3
Sulphur Dioxide: 0.22 μg/m3
Ozone: 89.29 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:45 AM
Sunset: 6:23 PM
Daylight: 11 hrs 16 mins

Moonrise: 11:24 AM
Moon Transit: 4:00 PM
Moonset: 8:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 9.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:30 PM - 6:00 PM

Minor Periods

8:04 PM - 9:34 PM
10:54 AM - 12:24 AM

Action Rating: 3 out of 5

Thursday, October 15, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 49.1°F
Average Humidity: 23%

Chance of Rain: 0%
Wind: 11 mph
UV Index: 6

Air Quality

AQI: 1 - Good

PM2.5: 1.67 μg/m3

PM10: 3.88 μg/m3

Carbon Monoxide: 119 μg/m3
Nitrogen Dioxide: 1.52 μg/m3
Sulphur Dioxide: 0.23 μg/m3
Ozone: 81.83 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:44 AM
Sunset: 6:22 PM
Daylight: 11 hrs 14 mins

Moonrise: 12:21 AM
Moon Transit: 4:51 PM
Moonset: 9:23 PM
Moon Phase: Waxing Crescent
Moon Illumination: 17.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:21 PM - 6:51 PM

Minor Periods

8:53 PM - 10:23 PM
11:51 AM - 1:21 PM

Action Rating: 3 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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