Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

47.1°F

Measurement Time: Saturday, February 7, 2026, 12:15 AM 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

44.6°F
Sunny
Sunny
41.3°F
51.7°F
76%
ENE 5.8 mph
12.2 mph
51.2°F
16.6°F
0 in
0%
9 mi
1025 mbar
0.4

Five Day Weather Forecast

Sunny
Sat
H: 71°F
L: 41°F
Sunny
Sun
H: 64°F
L: 34°F
Overcast
Mon
H: 60°F
L: 41°F
Moderate rain
Tue
H: 51°F
L: 41°F
Sunny
Wed
H: 51°F
L: 24°F

Air Quality

AQI: 1 - Good
PM2.5: 8.55 μg/m3
PM10: 11.65 μg/m3
Carbon Monoxide: 150.85 μg/m3
Nitrogen Dioxide: 6.55 μg/m3
Sulphur Dioxide: 3.45 μg/m3
Ozone: 91 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:13 AM
Sunset: 5:30 PM
Daylight: 10 hrs 32 mins
Moonrise: 11:55 PM
Moon Transit: 4:21 AM
Moonset: 9:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

3:51 AM - 6:21 AM
12:06 AM - 2:36 PM

Minor Periods

12:00 AM - 12:00 AM
9:12 AM - 10:42 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued February 6 at 10:04PM PST until February 7 at 10:00AM PST by NWS Hanford CA

Effective: Fri February 6, 2026, 10:04 PM
Expires: Sat February 7, 2026, 7:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Caruthers - San Joaquin - Selma, Delano-Wasco-Shafter, Fresno-Clovis, Hanford - Corcoran - Lemoore, Merced - Madera - Mendota, Planada - Le Grand - Snelling, Southeast San Joaquin Valley, and Visalia - Porterville - Reedley. * WHEN...Until 10 AM PST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Saturday, February 7, 2026

Weather Forecast

Sunny
70.7°F
40.8°F
56.9°F
36%
0 in
0%
0%
7.6 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 4.03 μg/m3
PM10: 6.06 μg/m3
Carbon Monoxide: 158.61 μg/m3
Nitrogen Dioxide: 5.11 μg/m3
Sulphur Dioxide: 1.84 μg/m3
Ozone: 74.72 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:13 AM
Sunset: 5:30 PM
Daylight: 10 hrs 32 mins
Moonrise: 11:55 PM
Moon Transit: 4:21 AM
Moonset: 9:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

3:51 AM - 6:21 AM
12:06 AM - 2:36 PM

Minor Periods

12:00 AM - 12:00 AM
9:12 AM - 10:42 AM

Action Rating: 2 out of 5

Sunday, February 8, 2026

Weather Forecast

Sunny
63.7°F
34°F
47.2°F
57%
0 in
0%
0%
7.6 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 6.96 μg/m3
PM10: 9.13 μg/m3
Carbon Monoxide: 157.97 μg/m3
Nitrogen Dioxide: 6.1 μg/m3
Sulphur Dioxide: 2.43 μg/m3
Ozone: 68.6 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:13 AM
Sunset: 5:31 PM
Daylight: 10 hrs 34 mins
Moonrise: 12:55 AM
Moon Transit: 5:05 AM
Moonset: 10:09 AM
Moon Phase: Last Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

4:35 AM - 7:05 AM
12:50 AM - 3:20 PM

Minor Periods

9:39 AM - 11:09 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, February 9, 2026

Weather Forecast

Overcast
59.7°F
41.2°F
49.9°F
48%
0 in
0%
0%
5.8 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 6.94 μg/m3
PM10: 7.88 μg/m3
Carbon Monoxide: 157.48 μg/m3
Nitrogen Dioxide: 5.88 μg/m3
Sulphur Dioxide: 2.16 μg/m3
Ozone: 57.96 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:14 AM
Sunset: 5:32 PM
Daylight: 10 hrs 36 mins
Moonrise: 12:57 AM
Moon Transit: 5:50 AM
Moonset: 10:40 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

5:20 AM - 7:50 AM
1:37 PM - 4:07 PM

Minor Periods

10:10 AM - 11:40 AM
12:27 AM - 1:57 AM

Action Rating: 2 out of 5

Tuesday, February 10, 2026

Weather Forecast

Moderate rain
51.4°F
40.7°F
46.6°F
71%
0.51 in
76%
0%
6.5 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 8.11 μg/m3
PM10: 8.94 μg/m3
Carbon Monoxide: 196.11 μg/m3
Nitrogen Dioxide: 6.59 μg/m3
Sulphur Dioxide: 1.97 μg/m3
Ozone: 50.6 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:14 AM
Sunset: 5:33 PM
Daylight: 10 hrs 38 mins
Moonrise: 1:58 AM
Moon Transit: 6:38 AM
Moonset: 11:16 AM
Moon Phase: Last Quarter
Moon Illumination: 30.3%

Best Times for Fishing or Hunting

Major Periods

6:08 AM - 8:38 AM
2:25 PM - 4:55 PM

Minor Periods

10:46 AM - 12:16 AM
1:28 AM - 2:58 AM

Action Rating: 2 out of 5

Wednesday, February 11, 2026

Weather Forecast

Sunny
50.6°F
24.3°F
35.5°F
75%
0 in
0%
0%
7.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.7 μg/m3
PM10: 5.27 μg/m3
Carbon Monoxide: 169.62 μg/m3
Nitrogen Dioxide: 4.63 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 67.15 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:14 AM
Sunset: 5:34 PM
Daylight: 10 hrs 40 mins
Moonrise: 2:57 AM
Moon Transit: 7:29 AM
Moonset: 12:00 AM
Moon Phase: Last Quarter
Moon Illumination: 20.5%

Best Times for Fishing or Hunting

Major Periods

6:59 AM - 9:29 AM
3:16 PM - 5:46 PM

Minor Periods

11:30 AM - 1:00 PM
2:27 AM - 3:57 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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