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

Current Water Temperature

49.3°F

Measurement Time: Friday, September 25, 2026, 7:00 PM 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

41°F
Mostly Clear
Mostly Clear
67%
SW 5 mph
31°F

Weather Forecast

Mostly Clear
Overnight
39°F - Mostly Clear
Sunny
Saturday
66°F - Sunny
Partly Cloudy
Saturday Night
38°F - Partly Cloudy
Sunny
Sunday
62°F - Sunny
Partly Cloudy then Chance Light Rain
Sunday Night
34°F - Partly Cloudy then Chance Light Rain
Chance Light Rain then Chance Showers And Thunderstorms
Monday
57°F - Chance Light Rain then Chance Showers And Thunderstorms
Slight Chance Light Rain then Mostly Clear
Monday Night
35°F - Slight Chance Light Rain then Mostly Clear
Sunny
Tuesday
67°F - Sunny
Mostly Clear
Tuesday Night
39°F - Mostly Clear
Sunny
Wednesday
73°F - Sunny
Mostly Clear
Wednesday Night
41°F - Mostly Clear
Sunny
Thursday
72°F - Sunny
Mostly Clear
Thursday Night
40°F - Mostly Clear
Sunny
Friday
71°F - Sunny

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:47 AM
Sunset: 6:47 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:40 PM
Moon Transit: 5:33 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
5:03 AM - 7:33 AM

Minor Periods

6:10 PM - 7:40 PM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:47 AM
Sunset: 6:47 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:40 PM
Moon Transit: 5:33 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
5:03 AM - 7:33 AM

Minor Periods

6:10 PM - 7:40 PM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:47 AM
Sunset: 6:47 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:40 PM
Moon Transit: 5:33 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
5:03 AM - 7:33 AM

Minor Periods

6:10 PM - 7:40 PM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:47 AM
Sunset: 6:47 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:40 PM
Moon Transit: 5:33 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
5:03 AM - 7:33 AM

Minor Periods

6:10 PM - 7:40 PM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:47 AM
Sunset: 6:45 PM
Daylight: 11 hrs 57 mins
Moonrise: 7:07 PM
Moon Transit: 1:11 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:41 AM - 3:11 AM
9:05 AM - 11:35 AM

Minor Periods

6:37 PM - 8:07 PM
7:25 AM - 8:55 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:47 AM
Sunset: 6:45 PM
Daylight: 11 hrs 57 mins
Moonrise: 7:07 PM
Moon Transit: 1:11 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:41 AM - 3:11 AM
9:05 AM - 11:35 AM

Minor Periods

6:37 PM - 8:07 PM
7:25 AM - 8:55 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:46 AM
Sunset: 6:44 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:38 PM
Moon Transit: 2:00 AM
Moonset: 9:05 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
9:54 AM - 12:24 AM

Minor Periods

7:08 PM - 8:38 PM
8:35 AM - 10:05 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:46 AM
Sunset: 6:44 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:38 PM
Moon Transit: 2:00 AM
Moonset: 9:05 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
9:54 AM - 12:24 AM

Minor Periods

7:08 PM - 8:38 PM
8:35 AM - 10:05 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:46 AM
Sunset: 6:42 PM
Daylight: 11 hrs 52 mins
Moonrise: 8:16 PM
Moon Transit: 2:52 AM
Moonset: 10:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:22 AM - 4:52 AM
10:48 AM - 1:18 PM

Minor Periods

7:46 PM - 9:16 PM
9:49 AM - 11:19 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:46 AM
Sunset: 6:42 PM
Daylight: 11 hrs 52 mins
Moonrise: 8:16 PM
Moon Transit: 2:52 AM
Moonset: 10:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:22 AM - 4:52 AM
10:48 AM - 1:18 PM

Minor Periods

7:46 PM - 9:16 PM
9:49 AM - 11:19 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:46 AM
Sunset: 6:41 PM
Daylight: 11 hrs 50 mins
Moonrise: 9:01 PM
Moon Transit: 3:49 AM
Moonset: 11:32 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
11:46 AM - 2:16 PM

Minor Periods

8:31 PM - 10:01 PM
11:02 AM - 12:32 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:46 AM
Sunset: 6:41 PM
Daylight: 11 hrs 50 mins
Moonrise: 9:01 PM
Moon Transit: 3:49 AM
Moonset: 11:32 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
11:46 AM - 2:16 PM

Minor Periods

8:31 PM - 10:01 PM
11:02 AM - 12:32 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:45 AM
Sunset: 6:39 PM
Daylight: 11 hrs 47 mins
Moonrise: 9:57 PM
Moon Transit: 4:49 AM
Moonset: 12:44 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
12:48 AM - 3:18 PM

Minor Periods

9:27 PM - 10:57 PM
12:14 AM - 1:44 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:45 AM
Sunset: 6:39 PM
Daylight: 11 hrs 47 mins
Moonrise: 9:57 PM
Moon Transit: 4:49 AM
Moonset: 12:44 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
12:48 AM - 3:18 PM

Minor Periods

9:27 PM - 10:57 PM
12:14 AM - 1:44 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:45 AM
Sunset: 6:38 PM
Daylight: 11 hrs 45 mins
Moonrise: 11:02 PM
Moon Transit: 5:52 AM
Moonset: 1:48 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
1:51 PM - 4:21 PM

Minor Periods

12:00 AM - 12:00 AM
1:18 PM - 2:48 PM

Action Rating: 2 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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