Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

48.0°F

Measurement Time: Saturday, January 24, 2026, 4:00 PM PST

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

24.4°F
Fog
Fog
16.5°F
24.4°F
10%
ENE 9.4 mph
19.7 mph
16.5°F
-23.2°F
0 in
100%
0 mi
1019 mbar
0

Five Day Weather Forecast

Cloudy
Sun
H: 40°F
L: 24°F
Overcast
Mon
H: 39°F
L: 28°F
Sunny
Tue
H: 40°F
L: 30°F
Light freezing rain
Wed
H: 40°F
L: 26°F
Sunny
Thu
H: 44°F
L: 28°F

Air Quality

AQI: 1 - Good
PM2.5: 1.38 μg/m3
PM10: 1.48 μg/m3
Carbon Monoxide: 135.68 μg/m3
Nitrogen Dioxide: 1.18 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 100 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:11 AM
Sunset: 5:15 PM
Daylight: 10 hrs 6 mins
Moonrise: 10:37 AM
Moon Transit: 5:40 PM
Moonset: 12:44 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
5:10 PM - 7:40 PM

Minor Periods

10:07 AM - 11:37 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Dense Fog Advisory issued January 24 at 1:42PM PST until January 25 at 11:00AM PST by NWS Hanford CA

Effective: Sat January 24, 2026, 1:42 PM
Expires: Sat January 24, 2026, 10:00 PM

* WHAT...Patches of Visibility down to a quarter mile in dense fog. * WHERE...San Joaquin Valley. * WHEN...From 11 PM this evening to 11 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued January 24 at 6:49PM PST until January 25 at 11:00AM PST by NWS Hanford CA

Effective: Sat January 24, 2026, 6:49 PM
Expires: Sun January 25, 2026, 3:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...A portion of central California. * WHEN...From 11 PM this evening to 11 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Sunday, January 25, 2026

Weather Forecast

Cloudy
40.1°F
23.5°F
30°F
26%
0 in
0%
0%
9.8 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 1.93 μg/m3
PM10: 2.3 μg/m3
Carbon Monoxide: 137.64 μg/m3
Nitrogen Dioxide: 1.24 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 99.28 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:11 AM
Sunset: 5:15 PM
Daylight: 10 hrs 6 mins
Moonrise: 10:37 AM
Moon Transit: 5:40 PM
Moonset: 12:44 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
5:10 PM - 7:40 PM

Minor Periods

10:07 AM - 11:37 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, January 26, 2026

Weather Forecast

Overcast
38.5°F
28.2°F
31.9°F
29%
0 in
0%
0%
7.4 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 4.35 μg/m3
PM10: 4.58 μg/m3
Carbon Monoxide: 135.8 μg/m3
Nitrogen Dioxide: 1.81 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 92.16 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:11 AM
Sunset: 5:16 PM
Daylight: 10 hrs 8 mins
Moonrise: 11:10 AM
Moon Transit: 6:34 PM
Moonset: 12:56 AM
Moon Phase: First Quarter
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
6:04 PM - 8:34 PM

Minor Periods

10:40 AM - 12:10 AM
12:26 AM - 1:56 AM

Action Rating: 2 out of 5

Tuesday, January 27, 2026

Weather Forecast

Sunny
39.9°F
29.8°F
33.4°F
24%
0 in
0%
0%
6.7 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 2.33 μg/m3
PM10: 2.57 μg/m3
Carbon Monoxide: 132.08 μg/m3
Nitrogen Dioxide: 1.47 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 101.6 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:12 AM
Sunset: 5:17 PM
Daylight: 10 hrs 10 mins
Moonrise: 11:50 AM
Moon Transit: 7:33 PM
Moonset: 2:10 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

2:24 AM - 4:54 AM
7:03 PM - 9:33 PM

Minor Periods

11:20 AM - 12:50 AM
1:40 AM - 3:10 AM

Action Rating: 2 out of 5

Wednesday, January 28, 2026

Weather Forecast

Light freezing rain
40°F
25.8°F
32.4°F
50%
0.01 in
60%
7%
8.3 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.3 μg/m3
PM10: 3.79 μg/m3
Carbon Monoxide: 126.61 μg/m3
Nitrogen Dioxide: 1.9 μg/m3
Sulphur Dioxide: 1.63 μg/m3
Ozone: 98.64 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:12 AM
Sunset: 5:18 PM
Daylight: 10 hrs 12 mins
Moonrise: 12:40 AM
Moon Transit: 8:35 PM
Moonset: 3:25 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

3:25 AM - 5:55 AM
8:05 PM - 10:35 PM

Minor Periods

12:10 AM - 1:40 PM
2:55 AM - 4:25 AM

Action Rating: 2 out of 5

Thursday, January 29, 2026

Weather Forecast

Sunny
43.6°F
27.8°F
32.6°F
44%
0 in
0%
0%
11.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.75 μg/m3
PM10: 3.24 μg/m3
Carbon Monoxide: 138.25 μg/m3
Nitrogen Dioxide: 2.29 μg/m3
Sulphur Dioxide: 1.26 μg/m3
Ozone: 100.69 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:12 AM
Sunset: 5:19 PM
Daylight: 10 hrs 13 mins
Moonrise: 1:41 PM
Moon Transit: 9:40 PM
Moonset: 4:35 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

4:30 AM - 7:00 AM
9:10 PM - 11:40 PM

Minor Periods

1:11 PM - 2:41 PM
4:05 AM - 5:35 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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