Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

45.5°F

Measurement Time: Friday, January 23, 2026, 10:30 PM PST

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

41.9°F
Clear
Clear
41.7°F
41.9°F
65%
ENE 6.7 mph
14.1 mph
41.7°F
31.4°F
0 in
0%
8 mi
1013 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 58°F
L: 33°F
Partly Cloudy
Sun
H: 54°F
L: 26°F
Cloudy
Mon
H: 58°F
L: 37°F
Sunny
Tue
H: 58°F
L: 33°F
Partly Cloudy
Wed
H: 57°F
L: 35°F

Air Quality

AQI: 1 - Good
PM2.5: 8.95 μg/m3
PM10: 9.45 μg/m3
Carbon Monoxide: 177.85 μg/m3
Nitrogen Dioxide: 6.35 μg/m3
Sulphur Dioxide: 3.45 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:11 AM
Sunset: 5:14 PM
Daylight: 10 hrs 5 mins
Moonrise: 10:10 AM
Moon Transit: 4:51 PM
Moonset: 11:44 PM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

12:00 AM - 12:00 AM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued January 23 at 2:34PM PST until January 24 at 10:00AM PST by NWS Sacramento CA

Effective: Fri January 23, 2026, 2:34 PM
Expires: Sat January 24, 2026, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Carquinez Strait and Delta, Central Sacramento Valley, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...Until 10 AM PST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous during the evening commute and the Saturday morning commute. * ADDITIONAL DETAILS...Dangerous driving conditions with visibilities lower than 500 feet at times.

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


Dense Fog Advisory issued January 23 at 8:49PM PST until January 24 at 11:00AM PST by NWS Hanford CA

Effective: Fri January 23, 2026, 8:49 PM
Expires: Sat January 24, 2026, 5:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...A portion of central California. * WHEN...Until 11 AM PST Saturday. * 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. Fog will clear in the afternoons and return by the evening hours.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Saturday, January 24, 2026

Weather Forecast

Sunny
58.3°F
33.3°F
46.8°F
63%
0 in
0%
0%
8.3 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 9.45 μg/m3
PM10: 9.81 μg/m3
Carbon Monoxide: 169.49 μg/m3
Nitrogen Dioxide: 6.23 μg/m3
Sulphur Dioxide: 2.31 μg/m3
Ozone: 55.4 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:11 AM
Sunset: 5:14 PM
Daylight: 10 hrs 5 mins
Moonrise: 10:10 AM
Moon Transit: 4:51 PM
Moonset: 11:44 PM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

12:00 AM - 12:00 AM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Partly Cloudy
54.3°F
25.7°F
39.3°F
28%
0 in
0%
0%
7.8 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.9 μg/m3
PM10: 5.38 μg/m3
Carbon Monoxide: 159.37 μg/m3
Nitrogen Dioxide: 4.95 μg/m3
Sulphur Dioxide: 2.43 μg/m3
Ozone: 69.64 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:12 AM
Sunset: 5:15 PM
Daylight: 10 hrs 6 mins
Moonrise: 10:38 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

12:37 AM - 3:07 AM
5:10 PM - 7:40 PM

Minor Periods

10:08 AM - 11:38 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, January 26, 2026

Weather Forecast

Cloudy
57.6°F
37°F
46°F
28%
0 in
0%
0%
7.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.19 μg/m3
PM10: 7.65 μg/m3
Carbon Monoxide: 161.89 μg/m3
Nitrogen Dioxide: 5.74 μg/m3
Sulphur Dioxide: 2.26 μg/m3
Ozone: 58.76 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:12 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

1:28 AM - 3:58 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
57.7°F
33.3°F
40.6°F
30%
0 in
0%
0%
6.9 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 3.99 μg/m3
PM10: 4.24 μg/m3
Carbon Monoxide: 154.77 μg/m3
Nitrogen Dioxide: 5.32 μg/m3
Sulphur Dioxide: 2.08 μg/m3
Ozone: 68.32 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:12 AM
Sunset: 5:18 PM
Daylight: 10 hrs 10 mins
Moonrise: 11:51 AM
Moon Transit: 7:33 PM
Moonset: 2:11 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

11:21 AM - 12:51 AM
1:41 AM - 3:11 AM

Action Rating: 2 out of 5

Wednesday, January 28, 2026

Weather Forecast

Partly Cloudy
57.3°F
35°F
43°F
44%
0 in
0%
0%
7.2 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 3.92 μg/m3
PM10: 4.17 μg/m3
Carbon Monoxide: 177.22 μg/m3
Nitrogen Dioxide: 5.53 μg/m3
Sulphur Dioxide: 1.99 μg/m3
Ozone: 68.38 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:12 AM
Sunset: 5:19 PM
Daylight: 10 hrs 12 mins
Moonrise: 12:41 AM
Moon Transit: 8:36 PM
Moonset: 3:25 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

3:24 AM - 5:54 AM
8:06 PM - 10:36 PM

Minor Periods

12:11 AM - 1:41 PM
2:55 AM - 4:25 AM

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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