Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

48.4°F 9.1°C
Frigid Dangerously Cold
48.4°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Tuesday, November 10, 2026, 10:30 PM PST

Temperature Locations

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Local Points of Interest

Stanislaus National Forest; Mather, CA; Harden Flat, CA

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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

55.9°F
Sunny
Conditions: Sunny
Humidity: 15%
Feels Like: 45.3°F
Wind: ENE 10.3 mph
Wind Gusts: 11.2 mph
Pressure: 30.03 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 52.6 mi
UV Index: 0

Weather Forecast

Sunny
Wed
H: 78°F
L: 53°F
Overcast
Thu
H: 75°F
L: 54°F
Moderate Rain Showers
Fri
H: 62°F
L: 44°F
Moderate Drizzle
Sat
H: 59°F
L: 44°F
Overcast
Sun
H: 63°F
L: 44°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.5 μg/m³
Good
PM10
3 μg/m³
Good
Ozone (O3)
48 μg/m³
Photochemical
NO2
3.8 μg/m³
Nitrogen Dioxide
SO2
0.1 μg/m³
Sulfur Dioxide
CO
118 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 15m daylight
Sunrise 6:36 AM
Solar Noon 11:43 AM
Sunset 4:51 PM
Moon
New • 2%
Moonrise 9:11 AM
Transit 1:44 PM
Moonset 6:17 PM

Best Times for Fishing or Hunting

Major Periods

12:48 AM - 3:18 AM
1:14 PM - 3:44 PM

Minor Periods

8:41 AM - 10:11 AM
5:47 PM - 7:17 PM
Action Rating:
Good Action 3/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 63.9°F
Average Humidity: 16%
Chance of Rain: 0%
Wind: 10.1 mph
UV Index: 4.2

Air Quality

EPA Index 1 • Good
PM2.5
3.5 μg/m³
Good
PM10
4 μg/m³
Good
Ozone (O3)
71.8 μg/m³
Photochemical
NO2
2.7 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
119.9 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 15m daylight
Sunrise 6:36 AM
Solar Noon 11:43 AM
Sunset 4:51 PM
Moon
New • 2%
Moonrise 9:11 AM
Transit 1:44 PM
Moonset 6:17 PM

Best Times for Fishing or Hunting

Major Periods

12:48 AM - 3:18 AM
1:14 PM - 3:44 PM

Minor Periods

8:41 AM - 10:11 AM
5:47 PM - 7:17 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 63.1°F
Average Humidity: 24%
Chance of Rain: 4%
Wind: 9.7 mph
UV Index: 4.1

Air Quality

EPA Index 1 • Good
PM2.5
3 μg/m³
Good
PM10
3.5 μg/m³
Good
Ozone (O3)
81.8 μg/m³
Photochemical
NO2
2.5 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
119.8 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 13m daylight
Sunrise 6:38 AM
Solar Noon 11:43 AM
Sunset 4:50 PM
Moon
Waxing Crescent • 6%
Moonrise 10:04 AM
Transit 2:36 PM
Moonset 7:10 PM

Best Times for Fishing or Hunting

Major Periods

1:40 AM - 4:10 AM
2:06 PM - 4:36 PM

Minor Periods

9:34 AM - 11:04 AM
6:40 PM - 8:10 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Moderate Rain Showers
Average Temperature: 53.1°F
Average Humidity: 67%
Chance of Rain: 98%
Wind: 17 mph
UV Index: 3.4

Air Quality

EPA Index 1 • Good
PM2.5
3.8 μg/m³
Good
PM10
4.8 μg/m³
Good
Ozone (O3)
89.3 μg/m³
Photochemical
NO2
1.7 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
122 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 11m daylight
Sunrise 6:39 AM
Solar Noon 11:44 AM
Sunset 4:50 PM
Moon
Waxing Crescent • 13%
Moonrise 10:50 AM
Transit 3:26 PM
Moonset 8:07 PM

Best Times for Fishing or Hunting

Major Periods

2:31 AM - 5:01 AM
2:56 PM - 5:26 PM

Minor Periods

10:20 AM - 11:50 AM
7:37 PM - 9:07 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Moderate Drizzle
Average Temperature: 48.9°F
Average Humidity: 75%
Chance of Rain: 75%
Wind: 6.5 mph
UV Index: 3.8

Air Quality

EPA Index 1 • Good
PM2.5
2.7 μg/m³
Good
PM10
3.9 μg/m³
Good
Ozone (O3)
73.3 μg/m³
Photochemical
NO2
1.9 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
122.5 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 9m daylight
Sunrise 6:40 AM
Solar Noon 11:44 AM
Sunset 4:49 PM
Moon
Waxing Crescent • 21%
Moonrise 11:28 AM
Transit 4:15 PM
Moonset 9:07 PM

Best Times for Fishing or Hunting

Major Periods

3:21 AM - 5:51 AM
3:45 PM - 6:15 PM

Minor Periods

10:58 AM - 12:28 PM
8:37 PM - 10:07 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 51.1°F
Average Humidity: 60%
Chance of Rain: 53%
Wind: 6.5 mph
UV Index: 3.6

Air Quality

EPA Index 1 • Good
PM2.5
4 μg/m³
Good
PM10
5.8 μg/m³
Good
Ozone (O3)
69.7 μg/m³
Photochemical
NO2
2 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
138.6 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 8m daylight
Sunrise 6:41 AM
Solar Noon 11:44 AM
Sunset 4:48 PM
Moon
Waxing Crescent • 31%
Moonrise 12:01 PM
Transit 5:01 PM
Moonset 10:08 PM

Best Times for Fishing or Hunting

Major Periods

4:08 AM - 6:38 AM
4:31 PM - 7:01 PM

Minor Periods

11:31 AM - 1:01 PM
9:38 PM - 11:08 PM
Action Rating:
Very Good 4/5
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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