Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

62.1°F

Measurement Time: Thursday, August 27, 2026, 9:30 PM PDT

Temperature Locations

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Local Points of Interest

Stanislaus National Forest; Mather, CA; Harden Flat, CA

Tuolumne River

Station Name: TUOLUMNE R AB EARLY INTAKE NR MATHER CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 2,493 feet

Nearest Address:
Preston Falls Trail
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.87936848, -119.947126

Nearby Water Temperatures

Tuolumne River, Groveland, CA (1.3 mi)
Cherry Creek, Groveland, CA (6.3 mi)
Tuolumne River, Groveland, CA (9.1 mi)
Tuolumne River, Groveland, CA (15.9 mi)
Merced River, Yosemite Valley, CA (23.5 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (50 mi)
Deadman Creek, Mammoth Lakes, CA (55.7 mi)
Hot Creek, Mammoth Lakes, CA (61.6 mi)
Hot Creek, Mammoth Lakes, CA (62.1 mi)
San Joaquin River, Friant, CA (63 mi)
Hot Creek, Mammoth Lakes, CA (63.4 mi)
Trout Creek, South Lake Tahoe, CA (71.9 mi)
Upper Truckee River, South Lake Tahoe, CA (72.1 mi)
General Creek, Tahoma, CA (81.5 mi)
South Fork American River, Rescue, CA (83.9 mi)

Weather for Groveland, California

Current Weather

69°F
Slight Chance Light Rain
Slight Chance Light Rain
46%
ENE 3 mph
47°F

Weather Forecast

Light Rain Likely
Overnight
66°F - Light Rain Likely
Showers And Thunderstorms Likely
Friday
85°F - Showers And Thunderstorms Likely
Partly Cloudy then Patchy Smoke
Friday Night
60°F - Partly Cloudy then Patchy Smoke
Patchy Smoke
Saturday
87°F - Patchy Smoke
Clear
Saturday Night
57°F - Clear
Sunny
Sunday
87°F - Sunny
Clear
Sunday Night
57°F - Clear
Sunny
Monday
86°F - Sunny
Mostly Clear
Monday Night
54°F - Mostly Clear
Slight Chance Light Rain
Tuesday
81°F - Slight Chance Light Rain
Slight Chance Light Rain
Tuesday Night
52°F - Slight Chance Light Rain
Slight Chance Light Rain
Wednesday
81°F - Slight Chance Light Rain
Partly Cloudy then Slight Chance Light Rain
Wednesday Night
54°F - Partly Cloudy then Slight Chance Light Rain
Slight Chance Light Rain
Thursday
84°F - Slight Chance Light Rain

Astronomical

Sunrise: 6:27 AM
Sun Transit: 1:00 PM
Sunset: 7:35 PM
Daylight: 13 hrs 8 mins
Moonrise: 7:52 PM
Moon Transit: 1:07 AM
Moonset: 6:55 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
8:52 AM - 11:22 AM

Minor Periods

7:22 PM - 8:52 PM
6:25 AM - 7:55 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:27 AM
Sun Transit: 1:00 PM
Sunset: 7:35 PM
Daylight: 13 hrs 8 mins
Moonrise: 7:52 PM
Moon Transit: 1:07 AM
Moonset: 6:55 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
8:52 AM - 11:22 AM

Minor Periods

7:22 PM - 8:52 PM
6:25 AM - 7:55 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:27 AM
Sun Transit: 1:00 PM
Sunset: 7:35 PM
Daylight: 13 hrs 8 mins
Moonrise: 7:52 PM
Moon Transit: 1:07 AM
Moonset: 6:55 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
8:52 AM - 11:22 AM

Minor Periods

7:22 PM - 8:52 PM
6:25 AM - 7:55 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:27 AM
Sun Transit: 1:00 PM
Sunset: 7:35 PM
Daylight: 13 hrs 8 mins
Moonrise: 7:52 PM
Moon Transit: 1:07 AM
Moonset: 6:55 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
8:52 AM - 11:22 AM

Minor Periods

7:22 PM - 8:52 PM
6:25 AM - 7:55 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:28 AM
Sun Transit: 1:00 PM
Sunset: 7:33 PM
Daylight: 13 hrs 5 mins
Moonrise: 8:16 PM
Moon Transit: 1:50 AM
Moonset: 7:59 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:20 AM - 3:50 AM
9:19 PM - 11:49 PM

Minor Periods

7:46 PM - 9:16 PM
7:29 AM - 8:59 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:28 AM
Sun Transit: 1:00 PM
Sunset: 7:33 PM
Daylight: 13 hrs 5 mins
Moonrise: 8:16 PM
Moon Transit: 1:50 AM
Moonset: 7:59 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:20 AM - 3:50 AM
9:19 PM - 11:49 PM

Minor Periods

7:46 PM - 9:16 PM
7:29 AM - 8:59 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:28 AM
Sun Transit: 1:00 PM
Sunset: 7:32 PM
Daylight: 13 hrs 3 mins
Moonrise: 8:41 PM
Moon Transit: 12:00 AM
Moonset: 9:04 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

8:11 PM - 9:41 PM
8:34 AM - 10:04 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:28 AM
Sun Transit: 1:00 PM
Sunset: 7:32 PM
Daylight: 13 hrs 3 mins
Moonrise: 8:41 PM
Moon Transit: 12:00 AM
Moonset: 9:04 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

8:11 PM - 9:41 PM
8:34 AM - 10:04 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:29 AM
Sun Transit: 1:00 PM
Sunset: 7:30 PM
Daylight: 13 hrs 1 mins
Moonrise: 9:08 PM
Moon Transit: 3:20 AM
Moonset: 10:12 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:50 AM - 5:20 AM
11:06 AM - 1:36 PM

Minor Periods

8:38 PM - 10:08 PM
9:42 AM - 11:12 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:29 AM
Sun Transit: 1:00 PM
Sunset: 7:30 PM
Daylight: 13 hrs 1 mins
Moonrise: 9:08 PM
Moon Transit: 3:20 AM
Moonset: 10:12 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:50 AM - 5:20 AM
11:06 AM - 1:36 PM

Minor Periods

8:38 PM - 10:08 PM
9:42 AM - 11:12 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 7:29 PM
Daylight: 12 hrs 58 mins
Moonrise: 9:40 PM
Moon Transit: 4:09 AM
Moonset: 11:22 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:39 AM - 6:09 AM
11:56 AM - 2:26 PM

Minor Periods

9:10 PM - 10:40 PM
10:52 AM - 12:22 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 7:29 PM
Daylight: 12 hrs 58 mins
Moonrise: 9:40 PM
Moon Transit: 4:09 AM
Moonset: 11:22 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:39 AM - 6:09 AM
11:56 AM - 2:26 PM

Minor Periods

9:10 PM - 10:40 PM
10:52 AM - 12:22 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:31 AM
Sun Transit: 1:00 PM
Sunset: 7:27 PM
Daylight: 12 hrs 56 mins
Moonrise: 10:19 PM
Moon Transit: 5:01 AM
Moonset: 12:34 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:31 AM - 7:01 AM
12:50 AM - 3:20 PM

Minor Periods

9:49 PM - 11:19 PM
12:04 AM - 1:34 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:31 AM
Sun Transit: 1:00 PM
Sunset: 7:27 PM
Daylight: 12 hrs 56 mins
Moonrise: 10:19 PM
Moon Transit: 5:01 AM
Moonset: 12:34 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:31 AM - 7:01 AM
12:50 AM - 3:20 PM

Minor Periods

9:49 PM - 11:19 PM
12:04 AM - 1:34 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:32 AM
Sun Transit: 1:00 PM
Sunset: 7:26 PM
Daylight: 12 hrs 54 mins
Moonrise: 11:06 PM
Moon Transit: 5:58 AM
Moonset: 1:47 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:28 AM - 7:58 AM
1:48 PM - 4:18 PM

Minor Periods

12:00 AM - 12:00 AM
1:17 PM - 2:47 PM

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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