Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

43.9°F

Measurement Time: Tuesday, January 13, 2026, 7:30 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

52.8°F
Clear
Clear
52.7°F
52.8°F
27%
ENE 8.1 mph
16.9 mph
52.7°F
19.6°F
0 in
0%
6 mi
1025 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 73°F
L: 41°F
Sunny
Thu
H: 69°F
L: 39°F
Sunny
Fri
H: 69°F
L: 36°F
Sunny
Sat
H: 67°F
L: 38°F
Sunny
Sun
H: 67°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 2.35 μg/m3
PM10: 2.75 μg/m3
Carbon Monoxide: 147.85 μg/m3
Nitrogen Dioxide: 3.25 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:08 AM
Sunset: 5:04 PM
Daylight: 9 hrs 49 mins
Moonrise: 4:09 AM
Moon Transit: 8:46 AM
Moonset: 1:21 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

8:16 AM - 10:46 AM
4:33 PM - 7:03 PM

Minor Periods

12:51 AM - 2:21 PM
3:39 AM - 5:09 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued January 13 at 12:51PM PST until January 14 at 11:00AM PST by NWS Hanford CA

Effective: Tue January 13, 2026, 12:51 PM
Expires: Tue January 13, 2026, 9:00 PM

* WHAT...Visibility one quarter mile to as low as 200 feet in dense fog. * WHERE...San Joaquin Valley. * WHEN...From 1 AM to 11 AM PST Wednesday. * 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 13 at 8:08PM PST until January 14 at 11:00AM PST by NWS Hanford CA

Effective: Tue January 13, 2026, 8:08 PM
Expires: Wed January 14, 2026, 5:00 AM

* WHAT...Visibility one quarter mile to as low as 200 feet in dense fog. * WHERE...San Joaquin Valley. * WHEN...From 1 AM to 11 AM PST Wednesday. * 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.
Wednesday, January 14, 2026

Weather Forecast

Sunny
72.5°F
40.8°F
56.8°F
34%
0 in
0%
0%
8.3 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 5.05 μg/m3
PM10: 5.48 μg/m3
Carbon Monoxide: 137.93 μg/m3
Nitrogen Dioxide: 4.47 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 55.52 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:08 AM
Sunset: 5:04 PM
Daylight: 9 hrs 49 mins
Moonrise: 4:09 AM
Moon Transit: 8:46 AM
Moonset: 1:21 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

8:16 AM - 10:46 AM
4:33 PM - 7:03 PM

Minor Periods

12:51 AM - 2:21 PM
3:39 AM - 5:09 AM

Action Rating: 2 out of 5

Thursday, January 15, 2026

Weather Forecast

Sunny
69.3°F
39°F
50.1°F
34%
0 in
0%
0%
8.3 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.71 μg/m3
PM10: 2.88 μg/m3
Carbon Monoxide: 132.41 μg/m3
Nitrogen Dioxide: 4.28 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 58.16 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:05 PM
Daylight: 9 hrs 51 mins
Moonrise: 5:07 AM
Moon Transit: 9:37 AM
Moonset: 2:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

5:25 PM - 7:55 PM
9:07 AM - 11:37 AM

Minor Periods

1:38 PM - 3:08 PM
4:37 AM - 6:07 AM

Action Rating: 3 out of 5

Friday, January 16, 2026

Weather Forecast

Sunny
68.5°F
36°F
46.3°F
40%
0 in
0%
0%
7.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.27 μg/m3
PM10: 2.41 μg/m3
Carbon Monoxide: 129.57 μg/m3
Nitrogen Dioxide: 4.37 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 60.4 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:06 PM
Daylight: 9 hrs 52 mins
Moonrise: 6:00 AM
Moon Transit: 10:30 AM
Moonset: 3:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

6:18 PM - 8:48 PM
10:00 AM - 12:30 AM

Minor Periods

2:32 PM - 4:02 PM
5:30 AM - 7:00 AM

Action Rating: 3 out of 5

Saturday, January 17, 2026

Weather Forecast

Sunny
67.3°F
37.7°F
47.3°F
44%
0 in
0%
0%
7.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.21 μg/m3
PM10: 2.43 μg/m3
Carbon Monoxide: 131.9 μg/m3
Nitrogen Dioxide: 4.1 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 65.16 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 12:10 AM
Sunset: 5:07 PM
Daylight: 9 hrs 53 mins
Moonrise: 6:48 AM
Moon Transit: 11:22 AM
Moonset: 4:02 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

7:10 PM - 9:40 PM
10:52 AM - 1:22 PM

Minor Periods

3:32 PM - 5:02 PM
6:18 AM - 7:48 AM

Action Rating: 4 out of 5

Sunday, January 18, 2026

Weather Forecast

Sunny
67.3°F
37.9°F
45.1°F
46%
0 in
0%
0%
7.4 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 2.46 μg/m3
PM10: 2.59 μg/m3
Carbon Monoxide: 164.98 μg/m3
Nitrogen Dioxide: 5.87 μg/m3
Sulphur Dioxide: 1.32 μg/m3
Ozone: 50.69 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 12:10 AM
Sunset: 5:08 PM
Daylight: 9 hrs 55 mins
Moonrise: 7:27 AM
Moon Transit: 12:14 AM
Moonset: 5:06 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

8:01 PM - 10:31 PM
11:44 AM - 2:14 PM

Minor Periods

4:36 PM - 6:06 PM
6:57 AM - 8:27 AM

Action Rating: 4 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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