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

Current Water Temperature

44.8°F

Measurement Time: Monday, October 5, 2026, 3:00 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°F
Sunny
Sunny
36%
0 mph
39°F

Weather Forecast

Sunny
Today
73°F - Sunny
Patchy Smoke then Mostly Clear
Tonight
44°F - Patchy Smoke then Mostly Clear
Sunny
Tuesday
74°F - Sunny
Mostly Clear
Tuesday Night
43°F - Mostly Clear
Sunny
Wednesday
76°F - Sunny
Clear
Wednesday Night
44°F - Clear
Sunny
Thursday
75°F - Sunny
Mostly Clear
Thursday Night
44°F - Mostly Clear
Sunny
Friday
73°F - Sunny
Mostly Clear
Friday Night
43°F - Mostly Clear
Sunny
Saturday
65°F - Sunny
Mostly Clear
Saturday Night
37°F - Mostly Clear
Sunny
Sunday
59°F - Sunny
Mostly Clear
Sunday Night
31°F - Mostly Clear

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:44 AM
Sunset: 6:33 PM
Daylight: 11 hrs 38 mins
Moonrise: 1:26 AM
Moon Transit: 8:49 AM
Moonset: 4:02 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:19 AM - 10:49 AM
4:45 PM - 7:15 PM

Minor Periods

3:32 PM - 5:02 PM
12:56 AM - 2:26 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: 6:56 AM
Sun Transit: 12:44 AM
Sunset: 6:33 PM
Daylight: 11 hrs 38 mins
Moonrise: 1:26 AM
Moon Transit: 8:49 AM
Moonset: 4:02 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:19 AM - 10:49 AM
4:45 PM - 7:15 PM

Minor Periods

3:32 PM - 5:02 PM
12:56 AM - 2:26 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: 6:56 AM
Sun Transit: 12:44 AM
Sunset: 6:33 PM
Daylight: 11 hrs 38 mins
Moonrise: 1:26 AM
Moon Transit: 8:49 AM
Moonset: 4:02 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:19 AM - 10:49 AM
4:45 PM - 7:15 PM

Minor Periods

3:32 PM - 5:02 PM
12:56 AM - 2:26 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: 6:57 AM
Sun Transit: 12:44 AM
Sunset: 6:32 PM
Daylight: 11 hrs 35 mins
Moonrise: 2:38 AM
Moon Transit: 9:41 AM
Moonset: 4:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

5:35 PM - 8:05 PM
9:11 AM - 11:41 AM

Minor Periods

4:03 PM - 5:33 PM
2:08 AM - 3:38 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: 6:57 AM
Sun Transit: 12:44 AM
Sunset: 6:32 PM
Daylight: 11 hrs 35 mins
Moonrise: 2:38 AM
Moon Transit: 9:41 AM
Moonset: 4:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

5:35 PM - 8:05 PM
9:11 AM - 11:41 AM

Minor Periods

4:03 PM - 5:33 PM
2:08 AM - 3:38 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: 6:57 AM
Sun Transit: 12:44 AM
Sunset: 6:30 PM
Daylight: 11 hrs 33 mins
Moonrise: 3:48 AM
Moon Transit: 10:29 AM
Moonset: 4:59 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

6:22 PM - 8:52 PM
9:59 AM - 12:29 AM

Minor Periods

4:29 PM - 5:59 PM
3:18 AM - 4:48 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: 6:57 AM
Sun Transit: 12:44 AM
Sunset: 6:30 PM
Daylight: 11 hrs 33 mins
Moonrise: 3:48 AM
Moon Transit: 10:29 AM
Moonset: 4:59 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

6:22 PM - 8:52 PM
9:59 AM - 12:29 AM

Minor Periods

4:29 PM - 5:59 PM
3:18 AM - 4:48 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: 6:58 AM
Sun Transit: 12:43 AM
Sunset: 6:29 PM
Daylight: 11 hrs 31 mins
Moonrise: 4:55 AM
Moon Transit: 11:15 AM
Moonset: 5:24 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

7:07 PM - 9:37 PM
10:45 AM - 1:15 PM

Minor Periods

4:54 PM - 6:24 PM
4:25 AM - 5:55 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: 6:58 AM
Sun Transit: 12:43 AM
Sunset: 6:29 PM
Daylight: 11 hrs 31 mins
Moonrise: 4:55 AM
Moon Transit: 11:15 AM
Moonset: 5:24 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

7:07 PM - 9:37 PM
10:45 AM - 1:15 PM

Minor Periods

4:54 PM - 6:24 PM
4:25 AM - 5:55 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: 6:59 AM
Sun Transit: 12:43 AM
Sunset: 6:28 PM
Daylight: 11 hrs 28 mins
Moonrise: 6:01 AM
Moon Transit: 12:00 AM
Moonset: 5:49 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

7:52 PM - 10:22 PM
11:30 AM - 2:00 PM

Minor Periods

5:19 PM - 6:49 PM
5:31 AM - 7:01 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: 6:59 AM
Sun Transit: 12:43 AM
Sunset: 6:28 PM
Daylight: 11 hrs 28 mins
Moonrise: 6:01 AM
Moon Transit: 12:00 AM
Moonset: 5:49 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

7:52 PM - 10:22 PM
11:30 AM - 2:00 PM

Minor Periods

5:19 PM - 6:49 PM
5:31 AM - 7:01 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: 7:00 AM
Sun Transit: 12:43 AM
Sunset: 6:26 PM
Daylight: 11 hrs 26 mins
Moonrise: 7:06 AM
Moon Transit: 12:44 AM
Moonset: 6:14 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

8:37 PM - 11:07 PM
12:14 AM - 2:44 PM

Minor Periods

5:44 PM - 7:14 PM
6:36 AM - 8:06 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: 7:00 AM
Sun Transit: 12:43 AM
Sunset: 6:26 PM
Daylight: 11 hrs 26 mins
Moonrise: 7:06 AM
Moon Transit: 12:44 AM
Moonset: 6:14 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

8:37 PM - 11:07 PM
12:14 AM - 2:44 PM

Minor Periods

5:44 PM - 7:14 PM
6:36 AM - 8:06 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: 7:01 AM
Sun Transit: 12:43 AM
Sunset: 6:25 PM
Daylight: 11 hrs 24 mins
Moonrise: 8:11 AM
Moon Transit: 1:30 PM
Moonset: 6:42 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

9:23 PM - 11:53 PM
1:00 PM - 3:30 PM

Minor Periods

6:12 PM - 7:42 PM
7:41 AM - 9:11 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: 7:01 AM
Sun Transit: 12:43 AM
Sunset: 6:25 PM
Daylight: 11 hrs 24 mins
Moonrise: 8:11 AM
Moon Transit: 1:30 PM
Moonset: 6:42 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

9:23 PM - 11:53 PM
1:00 PM - 3:30 PM

Minor Periods

6:12 PM - 7:42 PM
7:41 AM - 9:11 AM

Action Rating: 4 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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