Water Temperature of the Tuolumne River in Groveland, CA
Current Water Temperature
Measurement Time: Wednesday, August 27, 2025, 7:00 PM PDT
Temperature Locations
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Local Points of Interest
Hetch Hetchy Reservoir; Yosemite National Park; White Wolf, CASponsored Content
Station Name: TUOLUMNE R NR HETCH HETCHY CA
Data Source: Water Data - usgc.gov
Elevation Above Sea Level: 3,484 feet / 1,062 meters
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 (66.0 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

Humidity: 59%
Feels Like: 62.8°F
Wind: ENE 5.8 mph
Wind Gusts: 12.2 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast

Thu
H: 67°F
L: 52°F

Fri
H: 67°F
L: 56°F

Sat
H: 69°F
L: 56°F

Sun
H: 74°F
L: 52°F

Mon
H: 74°F
L: 53°F
Air Quality
Nitrogen Dioxide: 1.34 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 114 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:34 PM
Daylight: 13 hrs 7 mins
Moon Transit: 4:58 PM
Moonset: 10:01 PM
Moon Phase: Waxing Crescent
Moon Illumination: 21.1%
Best Times for Fishing or Hunting
Major Periods
12:01 AM - 2:31 AM4:28 PM - 6:58 PM
Minor Periods
9:31 PM - 11:01 PM11:20 AM - 12:50 AM
Action Rating: 2 out of 5
Flood Watch issued August 27 at 10:41AM PDT until August 27 at 10:00PM PDT by NWS Reno NV
Effective: Wed August 27, 2025, 10:41 AM
Expires: Wed August 27, 2025, 10:00 PM
* WHAT...Flash flooding caused by excessive rainfall is possible due to thunderstorms. * WHERE...Portions of California, including the following areas, Greater Lake Tahoe Area, Lassen-Eastern Plumas-Eastern Sierra Counties 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 10 PM PDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. This includes the Davis, Conner, Bear, Mill, Inn, and Tamarack burn scars. Flooding may also occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Heavy rainfall over the last several days has saturated the ground within the region allowing for additional rainfall today to cause flash flooding. - http://www.weather.gov/safety/flood
You should monitor later forecasts and be prepared to take action should Flood Advisories or Flash Flood Warnings be issued.
Flood Watch issued August 27 at 10:41AM PDT until August 27 at 10:00PM PDT by NWS Reno NV
Effective: Wed August 27, 2025, 10:41 AM
Expires: Wed August 27, 2025, 10:00 PM
* WHAT...Flash flooding caused by excessive rainfall is possible due to thunderstorms. * WHERE...Portions of California, including the following areas, Greater Lake Tahoe Area, Lassen-Eastern Plumas-Eastern Sierra Counties 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 10 PM PDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. This includes the Davis, Conner, Bear, Mill, Inn, and Tamarack burn scars. Flooding may also occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Heavy rainfall over the last several days has saturated the ground within the region allowing for additional rainfall today to cause flash flooding. - http://www.weather.gov/safety/flood
You should monitor later forecasts and be prepared to take action should Flood Advisories or Flash Flood Warnings be issued.
Weather Forecast
Average Temperature: 58.1°F
Average Humidity: 55%
Wind: 13.9 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 2.86 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 108.72 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:34 PM
Daylight: 13 hrs 7 mins
Moon Transit: 4:58 PM
Moonset: 10:01 PM
Moon Phase: Waxing Crescent
Moon Illumination: 21.1%
Best Times for Fishing or Hunting
Major Periods
12:01 AM - 2:31 AM4:28 PM - 6:58 PM
Minor Periods
9:31 PM - 11:01 PM11:20 AM - 12:50 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 60.4°F
Average Humidity: 52%
Wind: 12.5 mph
UV Index: 2.3
Air Quality
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 103.08 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:32 PM
Daylight: 13 hrs 5 mins
Moon Transit: 5:44 PM
Moonset: 10:32 PM
Moon Phase: Waxing Crescent
Moon Illumination: 31.0%
Best Times for Fishing or Hunting
Major Periods
12:45 AM - 3:15 AM5:14 PM - 7:44 PM
Minor Periods
10:02 PM - 11:32 PM12:21 AM - 1:51 PM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 61.6°F
Average Humidity: 45%
Wind: 11.9 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 3.18 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 108.6 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:31 PM
Daylight: 13 hrs 3 mins
Moon Transit: 6:32 PM
Moonset: 11:08 PM
Moon Phase: First Quarter
Moon Illumination: 41.9%
Best Times for Fishing or Hunting
Major Periods
1:31 AM - 4:01 AM6:02 PM - 8:32 PM
Minor Periods
12:00 AM - 12:00 AM1:22 PM - 2:52 PM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 62.2°F
Average Humidity: 35%
Wind: 11.9 mph
UV Index: 5
Air Quality
Nitrogen Dioxide: 4.48 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 92.77 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:29 PM
Daylight: 13 hrs mins
Moon Transit: 7:23 PM
Moonset: 12:08 AM
Moon Phase: First Quarter
Moon Illumination: 53.2%
Best Times for Fishing or Hunting
Major Periods
2:20 AM - 4:50 AM6:53 PM - 9:23 PM
Minor Periods
2:23 PM - 3:53 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 60°F
Average Humidity: 39%
Wind: 13.4 mph
UV Index: 5
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:28 PM
Daylight: 12 hrs 58 mins
Moon Transit: 8:16 PM
Moonset: 12:52 AM
Moon Phase: First Quarter
Moon Illumination: 64.3%
Best Times for Fishing or Hunting
Major Periods
3:12 AM - 5:42 AM7:46 PM - 10:16 PM
Minor Periods
3:18 PM - 4:48 PM12:00 AM - 12:00 AM
Action Rating: 3 out of 5