Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

43.9°F

Measurement Time: Monday, January 26, 2026, 10:45 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

44°F
Clear
Clear
43°F
44°F
16%
ENE 7.8 mph
16.4 mph
43°F
0.9°F
0 in
0%
9 mi
1025 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 63°F
L: 43°F
Sunny
Wed
H: 60°F
L: 35°F
Sunny
Thu
H: 64°F
L: 37°F
Partly Cloudy
Fri
H: 66°F
L: 38°F
Sunny
Sat
H: 69°F
L: 42°F

Air Quality

AQI: 1 - Good
PM2.5: 6.75 μg/m3
PM10: 7.25 μg/m3
Carbon Monoxide: 151.85 μg/m3
Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 2.85 μg/m3
Ozone: 94 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

Dense Fog Advisory issued January 26 at 1:40PM PST until January 27 at 11:00AM PST by NWS Sacramento CA

Effective: Mon January 26, 2026, 1:40 PM
Expires: Tue January 27, 2026, 11:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Central Sacramento Valley, Southern Sacramento Valley, and Northern San Joaquin Valley. * WHEN...From 10 PM this evening to 11 AM PST Tuesday. * IMPACTS...Low visibility could make driving conditions hazardous.

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


Dense Fog Advisory issued January 26 at 8:47PM PST until January 27 at 11:00AM PST by NWS Hanford CA

Effective: Mon January 26, 2026, 8:47 PM
Expires: Tue January 27, 2026, 5:00 AM

* WHAT...Visibility one quarter mile or less with some areas down to 800 feet in dense fog. * WHERE...A portion of central California. * WHEN...From midnight tonight to 11 AM PST Tuesday. * 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 27 at 3:13AM PST until January 27 at 11:00AM PST by NWS Hanford CA

Effective: Tue January 27, 2026, 3:13 AM
Expires: Tue January 27, 2026, 11:00 AM

* WHAT...Visibility one quarter mile or less with some areas down to 800 feet in dense fog. * WHERE...San Joaquin Valley. * WHEN...Until 11 AM PST this morning. * 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.
Tuesday, January 27, 2026

Weather Forecast

Sunny
62.8°F
43.2°F
51°F
23%
0 in
0%
0%
8.1 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 5.23 μg/m3
PM10: 5.69 μg/m3
Carbon Monoxide: 153.97 μg/m3
Nitrogen Dioxide: 4.92 μg/m3
Sulphur Dioxide: 1.88 μg/m3
Ozone: 69.08 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

Sunny
59.7°F
34.5°F
44.4°F
37%
0 in
0%
0%
7.2 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 5.73 μg/m3
PM10: 6.31 μg/m3
Carbon Monoxide: 154.69 μg/m3
Nitrogen Dioxide: 4.69 μg/m3
Sulphur Dioxide: 2.09 μg/m3
Ozone: 69.04 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

Thursday, January 29, 2026

Weather Forecast

Sunny
64°F
37°F
47.1°F
39%
0 in
0%
0%
6.9 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 4.85 μg/m3
PM10: 6.07 μg/m3
Carbon Monoxide: 161.77 μg/m3
Nitrogen Dioxide: 5.24 μg/m3
Sulphur Dioxide: 1.7 μg/m3
Ozone: 63.96 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:12 AM
Sunset: 5:20 PM
Daylight: 10 hrs 14 mins
Moonrise: 1:42 PM
Moon Transit: 9:41 PM
Moonset: 4:36 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
9:11 PM - 11:41 PM

Minor Periods

1:12 PM - 2:42 PM
4:06 AM - 5:36 AM

Action Rating: 3 out of 5

Friday, January 30, 2026

Weather Forecast

Partly Cloudy
66.1°F
38.1°F
47.5°F
46%
0 in
0%
0%
6.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.69 μg/m3
PM10: 7.12 μg/m3
Carbon Monoxide: 157.68 μg/m3
Nitrogen Dioxide: 5.11 μg/m3
Sulphur Dioxide: 1.63 μg/m3
Ozone: 60.2 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:13 AM
Sunset: 5:21 PM
Daylight: 10 hrs 16 mins
Moonrise: 2:53 PM
Moon Transit: 10:44 PM
Moonset: 5:37 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

5:33 AM - 8:03 AM
12:00 AM - 12:00 AM

Minor Periods

2:23 PM - 3:53 PM
5:07 AM - 6:37 AM

Action Rating: 3 out of 5

Saturday, January 31, 2026

Weather Forecast

Sunny
68.6°F
42°F
51.3°F
48%
0 in
0%
0%
7.4 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 5.94 μg/m3
PM10: 7.37 μg/m3
Carbon Monoxide: 187.41 μg/m3
Nitrogen Dioxide: 6.53 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 57.62 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:13 AM
Sunset: 5:22 PM
Daylight: 10 hrs 17 mins
Moonrise: 4:09 PM
Moon Transit: 11:44 PM
Moonset: 6:28 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

6:35 AM - 9:05 AM
12:00 AM - 12:00 AM

Minor Periods

3:39 PM - 5:09 PM
5:58 AM - 7:28 AM

Action Rating: 5 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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