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

Current Water Temperature

45.5°F

Measurement Time: Saturday, May 23, 2026, 5:00 AM PDT

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

63.5°F
Sunny
Sunny
63.5°F
63.5°F
21%
SW 7.4 mph
8.5 mph
63.5°F
23°F
0 in
3%
6 mi
1012 mbar
9.6

Five Day Weather Forecast

Sunny
Sat
H: 66°F
L: 40°F
Patchy rain nearby
Sun
H: 62°F
L: 42°F
Patchy rain nearby
Mon
H: 65°F
L: 40°F
Sunny
Tue
H: 56°F
L: 34°F
Moderate rain
Wed
H: 46°F
L: 27°F

Air Quality

AQI: 1 - Good
PM2.5: 8.58 μg/m3
PM10: 15.48 μg/m3
Carbon Monoxide: 133.68 μg/m3
Nitrogen Dioxide: 1.38 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 113 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:53 AM
Sunset: 8:06 PM
Daylight: 14 hrs 25 mins
Moonrise: 1:00 PM
Moon Transit: 7:37 PM
Moonset: 1:40 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

2:45 AM - 5:15 AM
7:07 PM - 9:37 PM

Minor Periods

12:30 AM - 2:00 PM
1:10 AM - 2:40 AM

Action Rating: 3 out of 5

Saturday, May 23, 2026

Weather Forecast

Sunny
65.5°F
39.7°F
52.4°F
38%
0 in
0%
0%
14.3 mph
10.2


Air Quality

AQI: 1 - Good
PM2.5: 8.43 μg/m3
PM10: 12.97 μg/m3
Carbon Monoxide: 130.08 μg/m3
Nitrogen Dioxide: 3.08 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 102.84 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:53 AM
Sunset: 8:06 PM
Daylight: 14 hrs 25 mins
Moonrise: 1:00 PM
Moon Transit: 7:37 PM
Moonset: 1:40 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

2:45 AM - 5:15 AM
7:07 PM - 9:37 PM

Minor Periods

12:30 AM - 2:00 PM
1:10 AM - 2:40 AM

Action Rating: 3 out of 5

Sunday, May 24, 2026

Weather Forecast

Patchy rain nearby
62.3°F
42.1°F
50.2°F
53%
0.16 in
86%
0%
10.7 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 10.63 μg/m3
PM10: 18.79 μg/m3
Carbon Monoxide: 130.92 μg/m3
Nitrogen Dioxide: 2.67 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 103.24 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:53 AM
Sunset: 8:07 PM
Daylight: 14 hrs 27 mins
Moonrise: 2:04 PM
Moon Transit: 8:21 PM
Moonset: 2:05 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
7:51 PM - 10:21 PM

Minor Periods

1:34 PM - 3:04 PM
1:35 AM - 3:05 AM

Action Rating: 4 out of 5

Monday, May 25, 2026

Weather Forecast

Patchy rain nearby
64.7°F
39.9°F
51.2°F
51%
0.01 in
88%
0%
14.3 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 9.34 μg/m3
PM10: 14.28 μg/m3
Carbon Monoxide: 130.72 μg/m3
Nitrogen Dioxide: 3 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 93.16 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 12:53 AM
Sunset: 8:08 PM
Daylight: 14 hrs 28 mins
Moonrise: 3:05 PM
Moon Transit: 9:02 PM
Moonset: 2:29 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

4:12 AM - 6:42 AM
8:32 PM - 11:02 PM

Minor Periods

2:35 PM - 4:05 PM
1:59 AM - 3:29 AM

Action Rating: 3 out of 5

Tuesday, May 26, 2026

Weather Forecast

Sunny
55.5°F
33.8°F
44.5°F
56%
0 in
0%
0%
19.2 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 7.27 μg/m3
PM10: 13.01 μg/m3
Carbon Monoxide: 124.94 μg/m3
Nitrogen Dioxide: 2.36 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 92.04 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 12:53 AM
Sunset: 8:08 PM
Daylight: 14 hrs 29 mins
Moonrise: 4:06 PM
Moon Transit: 9:44 PM
Moonset: 2:52 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

4:54 AM - 7:24 AM
9:14 PM - 11:44 PM

Minor Periods

3:36 PM - 5:06 PM
2:22 AM - 3:52 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Moderate rain
45.8°F
26.5°F
34.5°F
71%
0.63 in
86%
20%
11.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 6.54 μg/m3
PM10: 12.02 μg/m3
Carbon Monoxide: 128.68 μg/m3
Nitrogen Dioxide: 2.64 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 78.77 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 12:53 AM
Sunset: 8:09 PM
Daylight: 14 hrs 31 mins
Moonrise: 5:07 PM
Moon Transit: 10:27 PM
Moonset: 3:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

5:36 AM - 8:06 AM
12:00 AM - 12:00 AM

Minor Periods

4:37 PM - 6:07 PM
2:45 AM - 4:15 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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