Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

39.7°F

Measurement Time: Thursday, February 12, 2026, 10:45 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 A GRAND CYN OF TUOLUMNE AB HETCH HETCHY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,842 feet

Nearest Address:
White Wolf Road
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.9165884, -119.6598938

Nearby Water Temperatures

Tuolumne River, Groveland, CA (7.7 mi)
Merced River, Yosemite Valley, CA (13.9 mi)
Cherry Creek, Groveland, CA (14.5 mi)
Tuolumne River, Groveland, CA (15.9 mi)
Tuolumne River, Groveland, CA (17.1 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (37 mi)
Deadman Creek, Mammoth Lakes, CA (41 mi)
Hot Creek, Mammoth Lakes, CA (47.6 mi)
Hot Creek, Mammoth Lakes, CA (48.1 mi)
Hot Creek, Mammoth Lakes, CA (49.1 mi)
San Joaquin River, Friant, CA (64.5 mi)
Trout Creek, South Lake Tahoe, CA (71.4 mi)
Upper Truckee River, South Lake Tahoe, CA (71.8 mi)
Walker Lake, Walker Lake, NV (74.3 mi)
Walker Lake, Walker Lake, NV (76.8 mi)

Weather for Groveland, California

Current Weather

27.5°F
Partly Cloudy
Partly Cloudy
19°F
27.5°F
84%
ENE 10.3 mph
21.6 mph
19°F
23.3°F
0 in
0%
9 mi
1021 mbar
0

Five Day Weather Forecast

Thundery outbreaks in nearby
Thu
H: 37°F
L: 14°F
Sunny
Fri
H: 43°F
L: 14°F
Overcast
Sat
H: 39°F
L: 25°F
Overcast
Sun
H: 38°F
L: 19°F
Moderate or heavy snow in area with thunder
Mon
H: 27°F
L: 19°F

Air Quality

AQI: 1 - Good
PM2.5: 1.08 μg/m3
PM10: 1.08 μg/m3
Carbon Monoxide: 123.68 μg/m3
Nitrogen Dioxide: 1.08 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 94 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:12 AM
Sunset: 5:34 PM
Daylight: 10 hrs 42 mins
Moonrise: 3:51 AM
Moon Transit: 8:20 AM
Moonset: 12:49 AM
Moon Phase: Waning Crescent
Moon Illumination: 12.2%

Best Times for Fishing or Hunting

Major Periods

7:50 AM - 10:20 AM
4:10 PM - 6:40 PM

Minor Periods

12:19 AM - 1:49 PM
3:21 AM - 4:51 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued February 12 at 1:34PM PST until February 14 at 10:00AM PST by NWS Hanford CA

Effective: Thu February 12, 2026, 1:34 PM
Expires: Thu February 12, 2026, 10:15 PM

* WHAT...Visibility one quarter mile or less in dense fog. Worst case scenario with visibility down to zero. * WHERE...San Joaquin Valley, including Merced County southward to Bakersfield. * WHEN...From midnight tonight to 10 AM PST Saturday. However, improved visibility during late Friday morning until late Friday evening. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 180 and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Thursday, February 12, 2026

Weather Forecast

Thundery outbreaks in nearby
37.4°F
13.6°F
26.3°F
77%
0 in
0%
0%
11 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 1.46 μg/m3
PM10: 1.83 μg/m3
Carbon Monoxide: 129 μg/m3
Nitrogen Dioxide: 1.37 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 94.44 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:12 AM
Sunset: 5:34 PM
Daylight: 10 hrs 42 mins
Moonrise: 3:51 AM
Moon Transit: 8:20 AM
Moonset: 12:49 AM
Moon Phase: Waning Crescent
Moon Illumination: 12.2%

Best Times for Fishing or Hunting

Major Periods

7:50 AM - 10:20 AM
4:10 PM - 6:40 PM

Minor Periods

12:19 AM - 1:49 PM
3:21 AM - 4:51 AM

Action Rating: 2 out of 5

Friday, February 13, 2026

Weather Forecast

Sunny
43°F
14.2°F
27.9°F
68%
0 in
0%
0%
11.4 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 1.53 μg/m3
PM10: 1.8 μg/m3
Carbon Monoxide: 127.88 μg/m3
Nitrogen Dioxide: 1.3 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 99.04 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:12 AM
Sunset: 5:35 PM
Daylight: 10 hrs 45 mins
Moonrise: 4:41 AM
Moon Transit: 9:12 AM
Moonset: 1:47 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

8:42 AM - 11:12 AM
5:02 PM - 7:32 PM

Minor Periods

1:17 PM - 2:47 PM
4:11 AM - 5:41 AM

Action Rating: 2 out of 5

Saturday, February 14, 2026

Weather Forecast

Overcast
39.4°F
24.6°F
32.1°F
60%
0 in
0%
0%
8.7 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.97 μg/m3
PM10: 3.71 μg/m3
Carbon Monoxide: 144.84 μg/m3
Nitrogen Dioxide: 1.81 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 107.88 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:12 AM
Sunset: 5:36 PM
Daylight: 10 hrs 47 mins
Moonrise: 5:23 AM
Moon Transit: 10:04 AM
Moonset: 2:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

5:54 PM - 8:24 PM
9:34 AM - 12:04 AM

Minor Periods

2:21 PM - 3:51 PM
4:53 AM - 6:23 AM

Action Rating: 4 out of 5

Sunday, February 15, 2026

Weather Forecast

Overcast
37.6°F
19.4°F
28.3°F
52%
0 in
0%
0%
8.5 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 5.24 μg/m3
PM10: 6.88 μg/m3
Carbon Monoxide: 135.71 μg/m3
Nitrogen Dioxide: 1.82 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 113.48 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:12 AM
Sunset: 5:38 PM
Daylight: 10 hrs 49 mins
Moonrise: 6:00 AM
Moon Transit: 10:54 AM
Moonset: 3:56 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

6:43 PM - 9:13 PM
10:24 AM - 12:54 AM

Minor Periods

3:26 PM - 4:56 PM
5:30 AM - 7:00 AM

Action Rating: 3 out of 5

Monday, February 16, 2026

Weather Forecast

Moderate or heavy snow in area with thunder
27.2°F
19°F
21.7°F
90%
1.63 in
62%
48%
15.2 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 2.59 μg/m3
PM10: 3.02 μg/m3
Carbon Monoxide: 141.72 μg/m3
Nitrogen Dioxide: 1.62 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 110.85 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:12 AM
Sunset: 5:39 PM
Daylight: 10 hrs 51 mins
Moonrise: 6:31 AM
Moon Transit: 11:43 AM
Moonset: 5:03 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

7:31 PM - 10:01 PM
11:13 AM - 1:43 PM

Minor Periods

4:33 PM - 6:03 PM
6:01 AM - 7:31 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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