Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

50.7°F

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, CA

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Tuolumne River

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

62.8°F
Clear
Conditions: Clear
Humidity: 59%
Feels Like: 62.8°F
Wind: ENE 5.8 mph
Wind Gusts: 12.2 mph
Pressure: 30.08 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 67°F
L: 52°F
Partly Cloudy
Fri
H: 67°F
L: 56°F
Sunny
Sat
H: 69°F
L: 56°F
Sunny
Sun
H: 74°F
L: 52°F
Sunny
Mon
H: 74°F
L: 53°F

Air Quality

PM2.5: 4.36 μg/m3
PM10: 5.71 μg/m3
Carbon Monoxide: 159.43 μg/m3
Nitrogen Dioxide: 1.34 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 114 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:00 PM
Sunset: 7:34 PM
Daylight: 13 hrs 7 mins
Moonrise: 11:50 AM
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 AM
4:28 PM - 6:58 PM

Minor Periods

9:31 PM - 11:01 PM
11:20 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.


Thursday, August 28, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 58.1°F
Average Humidity: 55%
Chance of Rain: 85%
Wind: 13.9 mph
UV Index: 2.4

Air Quality

AQI: 1 - Good
PM2.5: 8.81 μg/m3
PM10: 11.02 μg/m3
Carbon Monoxide: 190.31 μg/m3
Nitrogen Dioxide: 2.86 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 108.72 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:00 PM
Sunset: 7:34 PM
Daylight: 13 hrs 7 mins
Moonrise: 11:50 AM
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 AM
4:28 PM - 6:58 PM

Minor Periods

9:31 PM - 11:01 PM
11:20 AM - 12:50 AM

Action Rating: 2 out of 5

Friday, August 29, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 60.4°F
Average Humidity: 52%
Chance of Rain: 0%
Wind: 12.5 mph
UV Index: 2.3

Air Quality

AQI: 1 - Good
PM2.5: 6.46 μg/m3
PM10: 7.53 μg/m3
Carbon Monoxide: 186.01 μg/m3
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 103.08 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 1:00 PM
Sunset: 7:32 PM
Daylight: 13 hrs 5 mins
Moonrise: 12:51 AM
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 AM
5:14 PM - 7:44 PM

Minor Periods

10:02 PM - 11:32 PM
12:21 AM - 1:51 PM

Action Rating: 3 out of 5

Saturday, August 30, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 61.6°F
Average Humidity: 45%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 5.81 μg/m3
PM10: 6.82 μg/m3
Carbon Monoxide: 186.48 μg/m3
Nitrogen Dioxide: 3.18 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 108.6 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 1:00 PM
Sunset: 7:31 PM
Daylight: 13 hrs 3 mins
Moonrise: 1:52 PM
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 AM
6:02 PM - 8:32 PM

Minor Periods

12:00 AM - 12:00 AM
1:22 PM - 2:52 PM

Action Rating: 2 out of 5

Sunday, August 31, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 62.2°F
Average Humidity: 35%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 5

Air Quality

AQI: 1 - Good
PM2.5: 4.53 μg/m3
PM10: 5.19 μg/m3
Carbon Monoxide: 194.16 μg/m3
Nitrogen Dioxide: 4.48 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 92.77 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 1:00 PM
Sunset: 7:29 PM
Daylight: 13 hrs mins
Moonrise: 2:53 PM
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 AM
6:53 PM - 9:23 PM

Minor Periods

2:23 PM - 3:53 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, September 1, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 60°F
Average Humidity: 39%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 5

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 1:00 PM
Sunset: 7:28 PM
Daylight: 12 hrs 58 mins
Moonrise: 3:48 PM
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 AM
7:46 PM - 10:16 PM

Minor Periods

3:18 PM - 4:48 PM
12:00 AM - 12:00 AM

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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