Water Temperature of the Middle Fork San Joaquin River in Mammoth Lakes, CA

Current Water Temperature

31.8°F

Measurement Time: Saturday, January 24, 2026, 11:00 PM PST

Temperature Locations

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Local Points of Interest

Devils Postpile National Monument

Middle Fork San Joaquin River

Station Name: MF SAN JOAQUIN R NR MAMMOTH LAKES CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 7,618 feet

Nearest Address:
A12 Devils Postpile Campground Rd
Mammoth Lakes, CA 93546
Madera County

GPS Coordinates: 37.63194444, -119.0863889

Nearby Water Temperatures

Deadman Creek, Mammoth Lakes, CA (11.5 mi)
Hot Creek, Mammoth Lakes, CA (12.3 mi)
Hot Creek, Mammoth Lakes, CA (12.9 mi)
Hot Creek, Mammoth Lakes, CA (14.9 mi)
Merced River, Yosemite Valley, CA (26.7 mi)
Tuolumne River, Groveland, CA (37 mi)
Tuolumne River, Groveland, CA (44.2 mi)
Tuolumne River, Groveland, CA (50 mi)
Cherry Creek, Groveland, CA (51 mi)
Tuolumne River, Groveland, CA (51.3 mi)
San Joaquin River, Friant, CA (56.8 mi)
Walker Lake, Walker Lake, NV (76.4 mi)
Walker Lake, Walker Lake, NV (79.8 mi)
Trout Creek, South Lake Tahoe, CA (101.1 mi)
Upper Truckee River, South Lake Tahoe, CA (101.8 mi)

Weather for Mammoth Lakes, California

Current Weather

-1.5°F
Clear
Clear
-7.8°F
14.3°F
70%
SW 2.7 mph
5.6 mph
6°F
-10.7°F
0 in
0%
9 mi
1023 mbar
0

Five Day Weather Forecast

Partly Cloudy
Sun
H: 39°F
L: 13°F
Sunny
Mon
H: 39°F
L: 20°F
Partly Cloudy
Tue
H: 40°F
L: 20°F
Overcast
Wed
H: 43°F
L: 26°F
Sunny
Thu
H: 44°F
L: 25°F

Air Quality

AQI: 1 - Good
PM2.5: 1.68 μg/m3
PM10: 1.98 μg/m3
Carbon Monoxide: 141.68 μg/m3
Nitrogen Dioxide: 0.98 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 104 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:08 AM
Sunset: 5:13 PM
Daylight: 10 hrs 7 mins
Moonrise: 10:35 AM
Moon Transit: 5:37 PM
Moonset: 12:40 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

12:41 AM - 3:11 AM
5:07 PM - 7:37 PM

Minor Periods

10:05 AM - 11:35 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, January 25, 2026

Weather Forecast

Partly Cloudy
38.5°F
13.1°F
24.5°F
43%
0 in
0%
0%
4.5 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.39 μg/m3
PM10: 2.94 μg/m3
Carbon Monoxide: 142.68 μg/m3
Nitrogen Dioxide: 1.81 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 84.08 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:08 AM
Sunset: 5:13 PM
Daylight: 10 hrs 7 mins
Moonrise: 10:35 AM
Moon Transit: 5:37 PM
Moonset: 12:40 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

12:41 AM - 3:11 AM
5:07 PM - 7:37 PM

Minor Periods

10:05 AM - 11:35 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, January 26, 2026

Weather Forecast

Sunny
39°F
20.1°F
26.6°F
44%
0 in
0%
0%
6.7 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 3.58 μg/m3
PM10: 3.83 μg/m3
Carbon Monoxide: 144.96 μg/m3
Nitrogen Dioxide: 2.7 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 82.32 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:08 AM
Sunset: 5:14 PM
Daylight: 10 hrs 9 mins
Moonrise: 11:07 AM
Moon Transit: 6:31 PM
Moonset: 12:52 AM
Moon Phase: First Quarter
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

1:32 AM - 4:02 AM
6:01 PM - 8:31 PM

Minor Periods

10:37 AM - 12:07 AM
12:22 AM - 1:52 AM

Action Rating: 2 out of 5

Tuesday, January 27, 2026

Weather Forecast

Partly Cloudy
39.7°F
20.3°F
27.3°F
38%
0 in
0%
0%
4.7 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 2.22 μg/m3
PM10: 2.48 μg/m3
Carbon Monoxide: 139 μg/m3
Nitrogen Dioxide: 2.37 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 85.68 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:09 AM
Sunset: 5:15 PM
Daylight: 10 hrs 11 mins
Moonrise: 11:48 AM
Moon Transit: 7:30 PM
Moonset: 2:06 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

2:27 AM - 4:57 AM
7:00 PM - 9:30 PM

Minor Periods

11:18 AM - 12:48 AM
1:36 AM - 3:06 AM

Action Rating: 2 out of 5

Wednesday, January 28, 2026

Weather Forecast

Overcast
42.5°F
25.9°F
30.8°F
51%
0 in
0%
0%
4.5 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.76 μg/m3
PM10: 3.08 μg/m3
Carbon Monoxide: 131.04 μg/m3
Nitrogen Dioxide: 2.18 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 87.28 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:09 AM
Sunset: 5:16 PM
Daylight: 10 hrs 13 mins
Moonrise: 12:39 AM
Moon Transit: 8:33 PM
Moonset: 3:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
8:03 PM - 10:33 PM

Minor Periods

12:09 AM - 1:39 PM
2:50 AM - 4:20 AM

Action Rating: 2 out of 5

Thursday, January 29, 2026

Weather Forecast

Sunny
43.9°F
24.7°F
31.6°F
57%
0 in
0%
0%
3.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.72 μg/m3
PM10: 5.76 μg/m3
Carbon Monoxide: 147.35 μg/m3
Nitrogen Dioxide: 2.47 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 89.92 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:09 AM
Sunset: 5:17 PM
Daylight: 10 hrs 15 mins
Moonrise: 1:40 PM
Moon Transit: 9:37 PM
Moonset: 4:31 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

4:32 AM - 7:02 AM
9:07 PM - 11:37 PM

Minor Periods

1:10 PM - 2:40 PM
4:01 AM - 5:31 AM

Action Rating: 3 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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