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

Current Water Temperature

52.5°F

Measurement Time: Friday, September 4, 2026, 6:00 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

39°F
Mostly Clear
Mostly Clear
92%
SW 5 mph
37°F

Weather Forecast

Mostly Clear
Overnight
36°F - Mostly Clear
Sunny
Saturday
64°F - Sunny
Mostly Clear
Saturday Night
38°F - Mostly Clear
Sunny
Sunday
62°F - Sunny
Clear
Sunday Night
36°F - Clear
Sunny
Labor Day
68°F - Sunny
Mostly Clear
Monday Night
40°F - Mostly Clear
Sunny then Slight Chance Light Rain
Tuesday
69°F - Sunny then Slight Chance Light Rain
Slight Chance Light Rain
Tuesday Night
45°F - Slight Chance Light Rain
Chance Light Rain
Wednesday
70°F - Chance Light Rain
Slight Chance Light Rain
Wednesday Night
46°F - Slight Chance Light Rain
Chance Showers And Thunderstorms
Thursday
71°F - Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms then Partly Cloudy
Thursday Night
45°F - Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And Thunderstorms
Friday
69°F - Slight Chance Showers And Thunderstorms

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:19 PM
Daylight: 12 hrs 49 mins
Moonrise: 12:02 AM
Moon Transit: 7:58 AM
Moonset: 3:53 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
3:57 PM - 6:27 PM

Minor Periods

3:23 PM - 4:53 PM
12:00 AM - 12:00 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: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:19 PM
Daylight: 12 hrs 49 mins
Moonrise: 12:02 AM
Moon Transit: 7:58 AM
Moonset: 3:53 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
3:57 PM - 6:27 PM

Minor Periods

3:23 PM - 4:53 PM
12:00 AM - 12:00 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: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:19 PM
Daylight: 12 hrs 49 mins
Moonrise: 12:02 AM
Moon Transit: 7:58 AM
Moonset: 3:53 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
3:57 PM - 6:27 PM

Minor Periods

3:23 PM - 4:53 PM
12:00 AM - 12:00 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: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:19 PM
Daylight: 12 hrs 49 mins
Moonrise: 12:02 AM
Moon Transit: 7:58 AM
Moonset: 3:53 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
3:57 PM - 6:27 PM

Minor Periods

3:23 PM - 4:53 PM
12:00 AM - 12:00 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: 6:31 AM
Sun Transit: 12:54 AM
Sunset: 7:17 PM
Daylight: 12 hrs 46 mins
Moonrise: 1:10 AM
Moon Transit: 9:00 AM
Moonset: 4:45 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:30 AM - 11:00 AM
4:58 PM - 7:28 PM

Minor Periods

4:15 PM - 5:45 PM
12:40 AM - 2:10 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: 6:31 AM
Sun Transit: 12:54 AM
Sunset: 7:17 PM
Daylight: 12 hrs 46 mins
Moonrise: 1:10 AM
Moon Transit: 9:00 AM
Moonset: 4:45 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:30 AM - 11:00 AM
4:58 PM - 7:28 PM

Minor Periods

4:15 PM - 5:45 PM
12:40 AM - 2:10 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: 6:32 AM
Sun Transit: 12:54 AM
Sunset: 7:16 PM
Daylight: 12 hrs 44 mins
Moonrise: 2:24 AM
Moon Transit: 10:00 AM
Moonset: 5:27 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

5:57 PM - 8:27 PM
9:30 AM - 12:00 AM

Minor Periods

4:57 PM - 6:27 PM
1:54 AM - 3:24 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: 6:32 AM
Sun Transit: 12:54 AM
Sunset: 7:16 PM
Daylight: 12 hrs 44 mins
Moonrise: 2:24 AM
Moon Transit: 10:00 AM
Moonset: 5:27 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

5:57 PM - 8:27 PM
9:30 AM - 12:00 AM

Minor Periods

4:57 PM - 6:27 PM
1:54 AM - 3:24 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: 6:33 AM
Sun Transit: 12:53 AM
Sunset: 7:14 PM
Daylight: 12 hrs 42 mins
Moonrise: 3:38 AM
Moon Transit: 10:56 AM
Moonset: 6:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

6:51 PM - 9:21 PM
10:26 AM - 12:56 AM

Minor Periods

5:32 PM - 7:02 PM
3:08 AM - 4:38 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: 6:33 AM
Sun Transit: 12:53 AM
Sunset: 7:14 PM
Daylight: 12 hrs 42 mins
Moonrise: 3:38 AM
Moon Transit: 10:56 AM
Moonset: 6:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

6:51 PM - 9:21 PM
10:26 AM - 12:56 AM

Minor Periods

5:32 PM - 7:02 PM
3:08 AM - 4:38 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: 6:34 AM
Sun Transit: 12:53 AM
Sunset: 7:13 PM
Daylight: 12 hrs 39 mins
Moonrise: 4:52 AM
Moon Transit: 11:47 AM
Moonset: 6:32 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

7:41 PM - 10:11 PM
11:17 AM - 1:47 PM

Minor Periods

6:02 PM - 7:32 PM
4:22 AM - 5:52 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: 6:34 AM
Sun Transit: 12:53 AM
Sunset: 7:13 PM
Daylight: 12 hrs 39 mins
Moonrise: 4:52 AM
Moon Transit: 11:47 AM
Moonset: 6:32 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

7:41 PM - 10:11 PM
11:17 AM - 1:47 PM

Minor Periods

6:02 PM - 7:32 PM
4:22 AM - 5:52 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: 6:35 AM
Sun Transit: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 37 mins
Moonrise: 6:03 AM
Moon Transit: 12:35 AM
Moonset: 6:58 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

8:28 PM - 10:58 PM
12:05 AM - 2:35 PM

Minor Periods

6:28 PM - 7:58 PM
5:33 AM - 7:03 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: 6:35 AM
Sun Transit: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 37 mins
Moonrise: 6:03 AM
Moon Transit: 12:35 AM
Moonset: 6:58 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

8:28 PM - 10:58 PM
12:05 AM - 2:35 PM

Minor Periods

6:28 PM - 7:58 PM
5:33 AM - 7:03 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: 6:35 AM
Sun Transit: 12:52 AM
Sunset: 7:10 PM
Daylight: 12 hrs 35 mins
Moonrise: 7:10 AM
Moon Transit: 1:21 PM
Moonset: 7:22 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

9:14 PM - 11:44 PM
12:51 AM - 3:21 PM

Minor Periods

6:52 PM - 8:22 PM
6:40 AM - 8:10 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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