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

Current Water Temperature

54.5°F

Measurement Time: Friday, August 28, 2026, 5:00 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

48°F
Slight Chance Light Rain
Slight Chance Light Rain
96%
SW 10 mph
47°F

Weather Forecast

Slight Chance Light Rain
Overnight
45°F - Slight Chance Light Rain
Slight Chance Showers And Thunderstorms
Saturday
68°F - Slight Chance Showers And Thunderstorms
Mostly Clear
Saturday Night
40°F - Mostly Clear
Sunny
Sunday
70°F - Sunny
Mostly Clear
Sunday Night
41°F - Mostly Clear
Sunny
Monday
70°F - Sunny
Mostly Clear
Monday Night
39°F - Mostly Clear
Sunny
Tuesday
65°F - Sunny
Mostly Clear
Tuesday Night
36°F - Mostly Clear
Sunny
Wednesday
65°F - Sunny
Partly Cloudy
Wednesday Night
39°F - Partly Cloudy
Slight Chance Light Rain
Thursday
67°F - Slight Chance Light Rain
Slight Chance Light Rain
Thursday Night
41°F - Slight Chance Light Rain
Slight Chance Light Rain
Friday
69°F - Slight Chance Light Rain

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:57 AM
Sunset: 7:29 PM
Daylight: 13 hrs 5 mins
Moonrise: 8:13 PM
Moon Transit: 1:47 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
9:19 PM - 11:49 PM

Minor Periods

7:43 PM - 9:13 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: 6:24 AM
Sun Transit: 12:57 AM
Sunset: 7:29 PM
Daylight: 13 hrs 5 mins
Moonrise: 8:13 PM
Moon Transit: 1:47 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
9:19 PM - 11:49 PM

Minor Periods

7:43 PM - 9:13 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: 6:24 AM
Sun Transit: 12:57 AM
Sunset: 7:29 PM
Daylight: 13 hrs 5 mins
Moonrise: 8:13 PM
Moon Transit: 1:47 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
9:19 PM - 11:49 PM

Minor Periods

7:43 PM - 9:13 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: 6:24 AM
Sun Transit: 12:57 AM
Sunset: 7:29 PM
Daylight: 13 hrs 5 mins
Moonrise: 8:13 PM
Moon Transit: 1:47 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
9:19 PM - 11:49 PM

Minor Periods

7:43 PM - 9:13 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: 6:25 AM
Sun Transit: 12:56 AM
Sunset: 7:28 PM
Daylight: 13 hrs 3 mins
Moonrise: 8:38 PM
Moon Transit: 12:00 AM
Moonset: 9:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

8:08 PM - 9:38 PM
8:31 AM - 10:01 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: 6:25 AM
Sun Transit: 12:56 AM
Sunset: 7:28 PM
Daylight: 13 hrs 3 mins
Moonrise: 8:38 PM
Moon Transit: 12:00 AM
Moonset: 9:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

8:08 PM - 9:38 PM
8:31 AM - 10:01 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: 6:26 AM
Sun Transit: 12:56 AM
Sunset: 7:26 PM
Daylight: 13 hrs mins
Moonrise: 9:05 PM
Moon Transit: 3:16 AM
Moonset: 10:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:46 AM - 5:16 AM
11:10 AM - 1:40 PM

Minor Periods

8:35 PM - 10:05 PM
9:38 AM - 11:08 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: 6:26 AM
Sun Transit: 12:56 AM
Sunset: 7:26 PM
Daylight: 13 hrs mins
Moonrise: 9:05 PM
Moon Transit: 3:16 AM
Moonset: 10:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:46 AM - 5:16 AM
11:10 AM - 1:40 PM

Minor Periods

8:35 PM - 10:05 PM
9:38 AM - 11:08 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: 6:27 AM
Sun Transit: 12:56 AM
Sunset: 7:25 PM
Daylight: 12 hrs 58 mins
Moonrise: 9:37 PM
Moon Transit: 4:05 AM
Moonset: 11:17 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:35 AM - 6:05 AM
12:00 AM - 2:30 PM

Minor Periods

9:07 PM - 10:37 PM
10:47 AM - 12:17 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: 6:27 AM
Sun Transit: 12:56 AM
Sunset: 7:25 PM
Daylight: 12 hrs 58 mins
Moonrise: 9:37 PM
Moon Transit: 4:05 AM
Moonset: 11:17 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:35 AM - 6:05 AM
12:00 AM - 2:30 PM

Minor Periods

9:07 PM - 10:37 PM
10:47 AM - 12:17 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: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:23 PM
Daylight: 12 hrs 56 mins
Moonrise: 10:16 PM
Moon Transit: 4:57 AM
Moonset: 12:30 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:27 AM - 6:57 AM
12:54 AM - 3:24 PM

Minor Periods

9:46 PM - 11:16 PM
12:00 AM - 1:30 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: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:23 PM
Daylight: 12 hrs 56 mins
Moonrise: 10:16 PM
Moon Transit: 4:57 AM
Moonset: 12:30 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:27 AM - 6:57 AM
12:54 AM - 3:24 PM

Minor Periods

9:46 PM - 11:16 PM
12:00 AM - 1:30 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: 6:29 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 53 mins
Moonrise: 11:04 PM
Moon Transit: 5:54 AM
Moonset: 1:42 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
1:52 PM - 4:22 PM

Minor Periods

12:00 AM - 12:00 AM
1:12 PM - 2:42 PM

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: 6:29 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 53 mins
Moonrise: 11:04 PM
Moon Transit: 5:54 AM
Moonset: 1:42 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
1:52 PM - 4:22 PM

Minor Periods

12:00 AM - 12:00 AM
1:12 PM - 2:42 PM

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: 12:55 AM
Sunset: 7:20 PM
Daylight: 12 hrs 51 mins
Moonrise: 12:04 AM
Moon Transit: 6:55 AM
Moonset: 2:51 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:25 AM - 8:55 AM
2:54 PM - 5:24 PM

Minor Periods

2:21 PM - 3:51 PM
12:00 AM - 12:00 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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