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

Current Water Temperature

52.2°F

Measurement Time: Thursday, June 18, 2026, 10:00 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

50°F
Clear
Clear
48.9°F
50°F
58%
SW 3.8 mph
8 mph
48.8°F
35.4°F
0 in
3%
6 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 73°F
L: 45°F
Sunny
Sat
H: 73°F
L: 42°F
Sunny
Sun
H: 77°F
L: 46°F
Sunny
Mon
H: 79°F
L: 50°F
Sunny
Tue
H: 81°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 9.2 μg/m3
PM10: 9.6 μg/m3
Carbon Monoxide: 102 μg/m3
Nitrogen Dioxide: 5.2 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 37 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:57 AM
Sunset: 8:21 PM
Daylight: 14 hrs 47 mins
Moonrise: 10:47 AM
Moon Transit: 5:32 PM
Moonset: 12:40 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
5:02 PM - 7:32 PM

Minor Periods

10:17 AM - 11:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Lake Wind Advisory issued June 18 at 7:31PM PDT until June 19 at 5:00AM PDT by NWS Hanford CA

Effective: Thu June 18, 2026, 7:31 PM
Expires: Fri June 19, 2026, 4:15 AM

* WHAT...West winds 15 to 25 mph with gusts up to 40 mph. * WHERE...San Luis Reservoir near Pacheco Pass. * WHEN...Until 5 AM PDT Friday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Gusty winds also expected through Pacheco Pass along SR 152.

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


Lake Wind Advisory issued June 19 at 4:53AM PDT until June 19 at 5:00AM PDT by NWS Hanford CA

Effective: Fri June 19, 2026, 4:53 AM
Expires: Fri June 19, 2026, 6:00 AM

Winds have fallen below advisory criteria.
Friday, June 19, 2026

Weather Forecast

Sunny
73.4°F
45.4°F
60°F
45%
0 in
3%
0%
18.3 mph
12.5


Air Quality

AQI: 1 - Good
PM2.5: 7.46 μg/m3
PM10: 10.21 μg/m3
Carbon Monoxide: 105.13 μg/m3
Nitrogen Dioxide: 1.99 μg/m3
Sulphur Dioxide: 0.63 μg/m3
Ozone: 84.54 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:57 AM
Sunset: 8:21 PM
Daylight: 14 hrs 47 mins
Moonrise: 10:47 AM
Moon Transit: 5:32 PM
Moonset: 12:40 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
5:02 PM - 7:32 PM

Minor Periods

10:17 AM - 11:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, June 20, 2026

Weather Forecast

Sunny
72.6°F
42°F
57.1°F
31%
0 in
0%
0%
15 mph
12.4


Air Quality

AQI: 1 - Good
PM2.5: 4.64 μg/m3
PM10: 7.3 μg/m3
Carbon Monoxide: 100.75 μg/m3
Nitrogen Dioxide: 1.84 μg/m3
Sulphur Dioxide: 0.33 μg/m3
Ozone: 83.67 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:58 AM
Sunset: 8:21 PM
Daylight: 14 hrs 47 mins
Moonrise: 11:53 AM
Moon Transit: 6:17 PM
Moonset: 12:08 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%

Best Times for Fishing or Hunting

Major Periods

1:25 AM - 3:55 AM
5:47 PM - 8:17 PM

Minor Periods

11:23 AM - 12:53 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, June 21, 2026

Weather Forecast

Sunny
76.6°F
45.6°F
60.2°F
31%
0 in
1%
0%
6.5 mph
12.4


Air Quality

AQI: 1 - Good
PM2.5: 3.78 μg/m3
PM10: 5.75 μg/m3
Carbon Monoxide: 99.04 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 0.46 μg/m3
Ozone: 93.29 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:58 AM
Sunset: 8:22 PM
Daylight: 14 hrs 47 mins
Moonrise: 12:57 AM
Moon Transit: 7:01 PM
Moonset: 12:32 AM
Moon Phase: First Quarter
Moon Illumination: 38.5%

Best Times for Fishing or Hunting

Major Periods

2:09 AM - 4:39 AM
6:31 PM - 9:01 PM

Minor Periods

12:27 AM - 1:57 PM
12:02 AM - 1:32 AM

Action Rating: 2 out of 5

Monday, June 22, 2026

Weather Forecast

Sunny
79.2°F
50°F
63.7°F
29%
0 in
0%
0%
10.3 mph
12.3


Air Quality

AQI: 1 - Good
PM2.5: 3.96 μg/m3
PM10: 6.18 μg/m3
Carbon Monoxide: 106.22 μg/m3
Nitrogen Dioxide: 1.72 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 89.58 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:58 AM
Sunset: 8:22 PM
Daylight: 14 hrs 47 mins
Moonrise: 1:59 PM
Moon Transit: 7:43 PM
Moonset: 12:55 AM
Moon Phase: First Quarter
Moon Illumination: 49.7%

Best Times for Fishing or Hunting

Major Periods

2:52 AM - 5:22 AM
7:13 PM - 9:43 PM

Minor Periods

1:29 PM - 2:59 PM
12:25 AM - 1:55 AM

Action Rating: 3 out of 5

Tuesday, June 23, 2026

Weather Forecast

Sunny
80.5°F
50.9°F
61.8°F
30%
0 in
1%
0%
13.9 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.62 μg/m3
PM10: 7.1 μg/m3
Carbon Monoxide: 138.67 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 51.67 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:58 AM
Sunset: 8:22 PM
Daylight: 14 hrs 46 mins
Moonrise: 3:01 PM
Moon Transit: 8:26 PM
Moonset: 1:19 AM
Moon Phase: First Quarter
Moon Illumination: 61.0%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
7:56 PM - 10:26 PM

Minor Periods

2:31 PM - 4:01 PM
12:49 AM - 2:19 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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