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

Current Water Temperature

52.3°F

Measurement Time: Friday, July 10, 2026, 1:00 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

67.6°F
Sunny
Sunny
57.7°F
67.6°F
8%
SW 4.9 mph
5.7 mph
67.6°F
4.4°F
0 in
2%
6 mi
1014 mbar
1.8

Five Day Weather Forecast

Sunny
Fri
H: 81°F
L: 49°F
Sunny
Sat
H: 83°F
L: 51°F
Partly Cloudy
Sun
H: 79°F
L: 53°F
Sunny
Mon
H: 69°F
L: 49°F
Sunny
Tue
H: 72°F
L: 47°F

Air Quality

AQI: 1 - Good
PM2.5: 4.8 μg/m3
PM10: 5.9 μg/m3
Carbon Monoxide: 95 μg/m3
Nitrogen Dioxide: 2.6 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:01 PM
Sunset: 8:20 PM
Daylight: 14 hrs 36 mins
Moonrise: 1:38 AM
Moon Transit: 9:11 AM
Moonset: 4:55 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.7%

Best Times for Fishing or Hunting

Major Periods

8:41 AM - 11:11 AM
5:09 PM - 7:39 PM

Minor Periods

4:25 PM - 5:55 PM
1:08 AM - 2:38 AM

Action Rating: 2 out of 5

Lake Wind Advisory issued July 9 at 10:46PM PDT until July 10 at 11:00PM PDT by NWS Hanford CA

Effective: Thu July 9, 2026, 10:46 PM
Expires: Fri July 10, 2026, 7:00 AM

* WHAT...West winds 15 to 20 mph with gusts up to 35 mph. * WHERE...West Side Mountains north of Highway 198, including San Luis Reservoir. * WHEN...Until 11 PM PDT Friday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Friday, July 10, 2026

Weather Forecast

Sunny
81.1°F
48.6°F
64°F
21%
0 in
0%
0%
16.3 mph
12.5


Air Quality

AQI: 1 - Good
PM2.5: 3.4 μg/m3
PM10: 4.29 μg/m3
Carbon Monoxide: 96.29 μg/m3
Nitrogen Dioxide: 2.31 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 83.33 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:01 PM
Sunset: 8:20 PM
Daylight: 14 hrs 36 mins
Moonrise: 1:38 AM
Moon Transit: 9:11 AM
Moonset: 4:55 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.7%

Best Times for Fishing or Hunting

Major Periods

8:41 AM - 11:11 AM
5:09 PM - 7:39 PM

Minor Periods

4:25 PM - 5:55 PM
1:08 AM - 2:38 AM

Action Rating: 2 out of 5

Saturday, July 11, 2026

Weather Forecast

Sunny
83°F
50.6°F
66.5°F
17%
0 in
1%
0%
16.3 mph
12.9


Air Quality

AQI: 1 - Good
PM2.5: 3.56 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 89.08 μg/m3
Nitrogen Dioxide: 2.38 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 80.33 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:01 PM
Sunset: 8:20 PM
Daylight: 14 hrs 35 mins
Moonrise: 2:25 AM
Moon Transit: 10:14 AM
Moonset: 6:10 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

6:14 PM - 8:44 PM
9:44 AM - 12:14 AM

Minor Periods

5:40 PM - 7:10 PM
1:55 AM - 3:25 AM

Action Rating: 3 out of 5

Sunday, July 12, 2026

Weather Forecast

Partly Cloudy
79°F
52.9°F
64.5°F
28%
0.01 in
17%
0%
17.9 mph
12.2


Air Quality

AQI: 1 - Good
PM2.5: 4.28 μg/m3
PM10: 5.85 μg/m3
Carbon Monoxide: 92.5 μg/m3
Nitrogen Dioxide: 2.03 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 81.67 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:02 PM
Sunset: 8:19 PM
Daylight: 14 hrs 34 mins
Moonrise: 3:24 AM
Moon Transit: 11:21 AM
Moonset: 7:17 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

7:21 PM - 9:51 PM
10:51 AM - 1:21 PM

Minor Periods

6:47 PM - 8:17 PM
2:54 AM - 4:24 AM

Action Rating: 3 out of 5

Monday, July 13, 2026

Weather Forecast

Sunny
69.3°F
49.1°F
58.9°F
57%
0.11 in
57%
0%
6.5 mph
10.7


Air Quality

AQI: 1 - Good
PM2.5: 5.4 μg/m3
PM10: 8.28 μg/m3
Carbon Monoxide: 103.3 μg/m3
Nitrogen Dioxide: 1.93 μg/m3
Sulphur Dioxide: 0.36 μg/m3
Ozone: 84.58 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:02 PM
Sunset: 8:19 PM
Daylight: 14 hrs 33 mins
Moonrise: 4:34 AM
Moon Transit: 12:27 AM
Moonset: 8:14 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

8:27 PM - 10:57 PM
11:57 AM - 2:27 PM

Minor Periods

7:44 PM - 9:14 PM
4:04 AM - 5:34 AM

Action Rating: 5 out of 5

Tuesday, July 14, 2026

Weather Forecast

Sunny
71.9°F
46.8°F
60.1°F
51%
0.01 in
17%
0%
4.9 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 6.8 μg/m3
PM10: 9.98 μg/m3
Carbon Monoxide: 125.17 μg/m3
Nitrogen Dioxide: 6.48 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 66.33 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:02 PM
Sunset: 8:18 PM
Daylight: 14 hrs 32 mins
Moonrise: 5:51 AM
Moon Transit: 1:31 PM
Moonset: 9:00 PM
Moon Phase: New
Moon Illumination: 1.9%

Best Times for Fishing or Hunting

Major Periods

9:28 PM - 11:58 PM
1:01 PM - 3:31 PM

Minor Periods

8:30 PM - 10:00 PM
5:21 AM - 6:51 AM

Action Rating: 5 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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