Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

46.4°F

Measurement Time: Monday, May 18, 2026, 4:15 PM PDT

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

33.5°F
Clear
Clear
25.6°F
33.5°F
34%
ENE 10.5 mph
22.1 mph
25.6°F
7.8°F
0 in
0%
6 mi
1020 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 51°F
L: 26°F
Sunny
Tue
H: 56°F
L: 32°F
Sunny
Wed
H: 59°F
L: 38°F
Sunny
Thu
H: 64°F
L: 42°F
Sunny
Fri
H: 65°F
L: 43°F

Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 3.08 μg/m3
Carbon Monoxide: 118.68 μg/m3
Nitrogen Dioxide: 1.88 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:55 AM
Sunset: 8:05 PM
Daylight: 14 hrs 19 mins
Moonrise: 7:03 AM
Moon Transit: 3:01 PM
Moonset: 10:59 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:31 PM - 5:01 PM

Minor Periods

10:29 PM - 11:59 PM
6:33 AM - 8:03 AM

Action Rating: 3 out of 5

Red Flag Warning issued May 18 at 2:43PM PDT until May 18 at 8:00PM PDT by NWS Hanford CA

Effective: Mon May 18, 2026, 2:43 PM
Expires: Mon May 18, 2026, 8:00 PM

* AFFECTED AREA...Fire weather zone 579 West Side Hills on the Coastal Range. Fire weather zone 580 San Joaquin Valley. * WIND...GUSTING TO 20 MPH. * HUMIDITY...15% OR LESS THROUGH MONDAY EVENING. * HIGHEST THREAT...LOW RELATIVE HUMIDITIES LEADING TO EASIER FIRE STARTS. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
Monday, May 18, 2026

Weather Forecast

Sunny
51.1°F
26.2°F
38.7°F
29%
0 in
0%
0%
14.8 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 3.36 μg/m3
Carbon Monoxide: 123.52 μg/m3
Nitrogen Dioxide: 1.03 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 103.68 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:55 AM
Sunset: 8:05 PM
Daylight: 14 hrs 19 mins
Moonrise: 7:03 AM
Moon Transit: 3:01 PM
Moonset: 10:59 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:31 PM - 5:01 PM

Minor Periods

10:29 PM - 11:59 PM
6:33 AM - 8:03 AM

Action Rating: 3 out of 5

Tuesday, May 19, 2026

Weather Forecast

Sunny
56.1°F
31.8°F
43.6°F
33%
0 in
0%
0%
11.6 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 2.51 μg/m3
PM10: 3.39 μg/m3
Carbon Monoxide: 121.52 μg/m3
Nitrogen Dioxide: 1.48 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 96.36 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:55 AM
Sunset: 8:06 PM
Daylight: 14 hrs 21 mins
Moonrise: 8:13 AM
Moon Transit: 4:07 PM
Moonset: 11:55 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:37 PM - 6:07 PM

Minor Periods

12:00 AM - 12:00 AM
7:43 AM - 9:13 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Sunny
58.6°F
37.6°F
48°F
36%
0 in
0%
0%
9.8 mph
9.8


Air Quality

AQI: 1 - Good
PM2.5: 2.73 μg/m3
PM10: 3.84 μg/m3
Carbon Monoxide: 118.64 μg/m3
Nitrogen Dioxide: 1.72 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 94 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:55 AM
Sunset: 8:07 PM
Daylight: 14 hrs 22 mins
Moonrise: 9:27 AM
Moon Transit: 5:08 PM
Moonset: 12:55 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
4:38 PM - 7:08 PM

Minor Periods

8:57 AM - 10:27 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, May 21, 2026

Weather Forecast

Sunny
64.4°F
42.1°F
52.6°F
44%
0 in
0%
0%
13 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.39 μg/m3
PM10: 5.63 μg/m3
Carbon Monoxide: 122.56 μg/m3
Nitrogen Dioxide: 1.77 μg/m3
Sulphur Dioxide: 0.97 μg/m3
Ozone: 98.4 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:55 AM
Sunset: 8:07 PM
Daylight: 14 hrs 24 mins
Moonrise: 10:43 AM
Moon Transit: 6:04 PM
Moonset: 12:39 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

1:00 AM - 3:30 AM
5:34 PM - 8:04 PM

Minor Periods

10:13 AM - 11:43 AM
12:09 AM - 1:39 AM

Action Rating: 3 out of 5

Friday, May 22, 2026

Weather Forecast

Sunny
65.4°F
43°F
53.6°F
44%
0 in
0%
0%
12.3 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 4.87 μg/m3
PM10: 6 μg/m3
Carbon Monoxide: 139.96 μg/m3
Nitrogen Dioxide: 2.55 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 89.62 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:55 AM
Sunset: 8:08 PM
Daylight: 14 hrs 25 mins
Moonrise: 11:54 AM
Moon Transit: 6:54 PM
Moonset: 1:14 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

1:54 AM - 4:24 AM
6:24 PM - 8:54 PM

Minor Periods

11:24 AM - 12:54 AM
12:44 AM - 2:14 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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