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

Current Water Temperature

46.0°F

Measurement Time: Friday, April 24, 2026, 8:00 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

44.1°F
Patchy rain nearby
Patchy rain nearby
39.2°F
44.1°F
55%
SW 8.7 mph
10 mph
39.2°F
29.1°F
0 in
90%
6 mi
1010 mbar
4.7

Five Day Weather Forecast

Patchy rain nearby
Fri
H: 45°F
L: 27°F
Moderate rain
Sat
H: 44°F
L: 27°F
Patchy light snow
Sun
H: 39°F
L: 24°F
Light freezing rain
Mon
H: 42°F
L: 19°F
Sunny
Tue
H: 51°F
L: 25°F

Air Quality

AQI: 1 - Good
PM2.5: 4.88 μg/m3
PM10: 6.78 μg/m3
Carbon Monoxide: 148.68 μg/m3
Nitrogen Dioxide: 2.38 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 102 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 12:54 AM
Sunset: 7:40 PM
Daylight: 13 hrs 31 mins
Moonrise: 12:53 AM
Moon Transit: 8:07 PM
Moonset: 2:38 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
7:37 PM - 10:07 PM

Minor Periods

12:23 AM - 1:53 PM
2:08 AM - 3:38 AM

Action Rating: 4 out of 5

Friday, April 24, 2026

Weather Forecast

Patchy rain nearby
45.3°F
26.5°F
35.5°F
64%
0.02 in
84%
3%
9.4 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 2.49 μg/m3
PM10: 3.58 μg/m3
Carbon Monoxide: 139.56 μg/m3
Nitrogen Dioxide: 2.17 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 119.04 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 12:54 AM
Sunset: 7:40 PM
Daylight: 13 hrs 31 mins
Moonrise: 12:53 AM
Moon Transit: 8:07 PM
Moonset: 2:38 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
7:37 PM - 10:07 PM

Minor Periods

12:23 AM - 1:53 PM
2:08 AM - 3:38 AM

Action Rating: 4 out of 5

Saturday, April 25, 2026

Weather Forecast

Moderate rain
44°F
26.8°F
34.9°F
75%
0.3 in
88%
14%
7.2 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 3.53 μg/m3
PM10: 5.66 μg/m3
Carbon Monoxide: 136.6 μg/m3
Nitrogen Dioxide: 1.52 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 113.64 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 12:54 AM
Sunset: 7:41 PM
Daylight: 13 hrs 33 mins
Moonrise: 2:01 PM
Moon Transit: 8:54 PM
Moonset: 3:10 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%

Best Times for Fishing or Hunting

Major Periods

4:00 AM - 6:30 AM
8:24 PM - 10:54 PM

Minor Periods

1:31 PM - 3:01 PM
2:40 AM - 4:10 AM

Action Rating: 3 out of 5

Sunday, April 26, 2026

Weather Forecast

Patchy light snow
39.4°F
24°F
32.2°F
81%
0.13 in
85%
35%
9.4 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 2.29 μg/m3
PM10: 3.91 μg/m3
Carbon Monoxide: 145.84 μg/m3
Nitrogen Dioxide: 1.41 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 109.88 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 12:54 AM
Sunset: 7:42 PM
Daylight: 13 hrs 35 mins
Moonrise: 3:07 PM
Moon Transit: 9:39 PM
Moonset: 3:37 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

4:47 AM - 7:17 AM
9:09 PM - 11:39 PM

Minor Periods

2:37 PM - 4:07 PM
3:07 AM - 4:37 AM

Action Rating: 2 out of 5

Monday, April 27, 2026

Weather Forecast

Light freezing rain
42.3°F
18.6°F
31.2°F
66%
0.01 in
80%
3%
6.5 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 1.74 μg/m3
PM10: 3.25 μg/m3
Carbon Monoxide: 133.91 μg/m3
Nitrogen Dioxide: 1.13 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 105.64 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 12:53 AM
Sunset: 7:43 PM
Daylight: 13 hrs 37 mins
Moonrise: 4:10 PM
Moon Transit: 10:21 PM
Moonset: 4:01 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
12:00 AM - 12:00 AM

Minor Periods

3:40 PM - 5:10 PM
3:31 AM - 5:01 AM

Action Rating: 2 out of 5

Tuesday, April 28, 2026

Weather Forecast

Sunny
51.1°F
25.3°F
37.9°F
59%
0 in
0%
0%
8.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.52 μg/m3
PM10: 5.94 μg/m3
Carbon Monoxide: 139.39 μg/m3
Nitrogen Dioxide: 2.29 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 106.77 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 12:53 AM
Sunset: 7:44 PM
Daylight: 13 hrs 40 mins
Moonrise: 5:11 PM
Moon Transit: 11:03 PM
Moonset: 4:24 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.6%

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
12:00 AM - 12:00 AM

Minor Periods

4:41 PM - 6:11 PM
3:54 AM - 5:24 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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