Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

48.2°F

Measurement Time: Friday, January 23, 2026, 1:00 AM 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

38.6°F
Sunny
Sunny
36.2°F
38.6°F
72%
W 2.7 mph
3.1 mph
36.2°F
30.2°F
0 in
0%
8 mi
1015 mbar
1.8

Five Day Weather Forecast

Sunny
Fri
H: 42°F
L: 24°F
Sunny
Sat
H: 34°F
L: 19°F
Partly Cloudy
Sun
H: 38°F
L: 23°F
Partly Cloudy
Mon
H: 38°F
L: 27°F
Sunny
Tue
H: 43°F
L: 26°F

Air Quality

AQI: 1 - Good
PM2.5: 11.58 μg/m3
PM10: 12.58 μg/m3
Carbon Monoxide: 141.68 μg/m3
Nitrogen Dioxide: 2.28 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:11 AM
Sunset: 5:12 PM
Daylight: 10 hrs 3 mins
Moonrise: 9:44 AM
Moon Transit: 6:54 AM
Moonset: 10:35 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
6:24 AM - 8:54 AM

Minor Periods

10:05 PM - 11:35 PM
9:14 AM - 10:44 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued January 22 at 4:25PM PST until January 23 at 11:00AM PST by NWS Sacramento CA

Effective: Thu January 22, 2026, 4:25 PM
Expires: Fri January 23, 2026, 11:00 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...From 10 PM this evening to 11 AM PST Friday. * 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 23 at 12:47AM PST until January 23 at 11:00AM PST by NWS Sacramento CA

Effective: Fri January 23, 2026, 12:47 AM
Expires: Fri January 23, 2026, 11:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Carquinez Strait and Delta, Central and Southern Sacramento Valley, and Northern San Joaquin Valley. * WHEN...Until 11 AM PST this morning. * 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 22 at 8:25PM PST until January 24 at 11:00AM PST by NWS Hanford CA

Effective: Thu January 22, 2026, 8:25 PM
Expires: Fri January 23, 2026, 4:30 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.


Dense Fog Advisory issued January 23 at 4:10AM PST until January 24 at 11:00AM PST by NWS Hanford CA

Effective: Fri January 23, 2026, 4:10 AM
Expires: Fri January 23, 2026, 1:00 PM

* 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.
Friday, January 23, 2026

Weather Forecast

Sunny
42.4°F
24.1°F
33.3°F
72%
0 in
0%
0%
8.1 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 7.83 μg/m3
PM10: 8.88 μg/m3
Carbon Monoxide: 105.68 μg/m3
Nitrogen Dioxide: 1.85 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 87.16 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:11 AM
Sunset: 5:12 PM
Daylight: 10 hrs 3 mins
Moonrise: 9:44 AM
Moon Transit: 6:54 AM
Moonset: 10:35 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
6:24 AM - 8:54 AM

Minor Periods

10:05 PM - 11:35 PM
9:14 AM - 10:44 AM

Action Rating: 2 out of 5

Saturday, January 24, 2026

Weather Forecast

Sunny
33.8°F
19.4°F
24.9°F
55%
0 in
0%
0%
11.4 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 5.45 μg/m3
PM10: 5.98 μg/m3
Carbon Monoxide: 131.88 μg/m3
Nitrogen Dioxide: 1.4 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 92.48 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:11 AM
Sunset: 5:14 PM
Daylight: 10 hrs 4 mins
Moonrise: 10:09 AM
Moon Transit: 4:50 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
4:20 PM - 6:50 PM

Minor Periods

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

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Partly Cloudy
38.3°F
22.5°F
29.2°F
32%
0 in
0%
0%
8.5 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 2.96 μg/m3
Carbon Monoxide: 138.48 μg/m3
Nitrogen Dioxide: 1.33 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 97.2 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

Partly Cloudy
38.3°F
26.7°F
30.5°F
50%
0 in
0%
0%
5.8 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.09 μg/m3
PM10: 7.54 μg/m3
Carbon Monoxide: 138.42 μg/m3
Nitrogen Dioxide: 2.02 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 90.52 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
42.9°F
26.2°F
32.4°F
60%
0 in
0%
0%
5.8 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 4.23 μg/m3
PM10: 4.49 μg/m3
Carbon Monoxide: 152.89 μg/m3
Nitrogen Dioxide: 2.12 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 92.54 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

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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