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

Current Water Temperature

51.6°F

Measurement Time: Saturday, June 27, 2026, 2:00 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

40.1°F
Clear
Clear
34.7°F
40.1°F
65%
SW 8.1 mph
16.9 mph
34.7°F
29.2°F
0 in
6%
6 mi
1013 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 62°F
L: 37°F
Sunny
Sun
H: 61°F
L: 31°F
Sunny
Mon
H: 64°F
L: 34°F
Sunny
Tue
H: 69°F
L: 40°F
Sunny
Wed
H: 70°F
L: 39°F

Air Quality

AQI: 1 - Good
PM2.5: 2.2 μg/m3
PM10: 2.7 μg/m3
Carbon Monoxide: 98 μg/m3
Nitrogen Dioxide: 0.8 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 98 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 45 mins
Moonrise: 7:02 PM
Moon Transit: 11:35 PM
Moonset: 3:23 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.2%

Best Times for Fishing or Hunting

Major Periods

6:39 AM - 9:09 AM
12:00 AM - 12:00 AM

Minor Periods

6:32 PM - 8:02 PM
2:53 AM - 4:23 AM

Action Rating: 3 out of 5

Lake Wind Advisory issued June 27 at 12:33AM PDT until June 27 at 11:00PM PDT by NWS Reno NV

Effective: Sat June 27, 2026, 12:33 AM
Expires: Sat June 27, 2026, 11:00 PM

* WHAT...Southwest winds 15 to 25 mph with gusts up to 40 mph for Topaz Lake, Bridgeport Reservoir, Mono Lake, and Crowley Lake. * WHERE...Mono County. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.


Lake Wind Advisory issued June 27 at 1:02PM PDT until June 28 at 2:00AM PDT by NWS Hanford CA

Effective: Sat June 27, 2026, 1:02 PM
Expires: Sat June 27, 2026, 9:15 PM

* WHAT...West winds 20 to 25 mph with gusts up to 35 mph. * WHERE...San Luis Reservoir and Pacheco Pass. * WHEN...From 4 PM this afternoon to 2 AM PDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

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


Lake Wind Advisory issued June 27 at 8:46PM PDT until June 28 at 2:00AM PDT by NWS Hanford CA

Effective: Sat June 27, 2026, 8:46 PM
Expires: Sun June 28, 2026, 2:00 AM

* WHAT...West winds 15 to 20 mph with gusts up to 35 mph. * WHERE...Los Banos - Dos Palos and West Side Mountains north of 198. * WHEN...Until 2 AM PDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Saturday, June 27, 2026

Weather Forecast

Sunny
62°F
36.5°F
48.6°F
55%
0 in
5%
0%
16.3 mph
11.3


Air Quality

AQI: 1 - Good
PM2.5: 2.46 μg/m3
PM10: 3.31 μg/m3
Carbon Monoxide: 97.71 μg/m3
Nitrogen Dioxide: 1.04 μg/m3
Sulphur Dioxide: 0.33 μg/m3
Ozone: 93.5 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 45 mins
Moonrise: 7:02 PM
Moon Transit: 11:35 PM
Moonset: 3:23 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.2%

Best Times for Fishing or Hunting

Major Periods

6:39 AM - 9:09 AM
12:00 AM - 12:00 AM

Minor Periods

6:32 PM - 8:02 PM
2:53 AM - 4:23 AM

Action Rating: 3 out of 5

Sunday, June 28, 2026

Weather Forecast

Sunny
61°F
31.2°F
46.6°F
40%
0 in
1%
0%
10.1 mph
10.4


Air Quality

AQI: 1 - Good
PM2.5: 2.7 μg/m3
PM10: 3.26 μg/m3
Carbon Monoxide: 94.13 μg/m3
Nitrogen Dioxide: 1.18 μg/m3
Sulphur Dioxide: 0.26 μg/m3
Ozone: 87.25 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 45 mins
Moonrise: 7:55 PM
Moon Transit: 12:00 AM
Moonset: 4:08 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:30 AM - 10:00 AM

Minor Periods

7:25 PM - 8:55 PM
3:38 AM - 5:08 AM

Action Rating: 3 out of 5

Monday, June 29, 2026

Weather Forecast

Sunny
64.1°F
34.1°F
49.5°F
33%
0 in
17%
0%
9.2 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 1.47 μg/m3
PM10: 1.8 μg/m3
Carbon Monoxide: 93.25 μg/m3
Nitrogen Dioxide: 1.58 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 85.25 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 45 mins
Moonrise: 8:42 PM
Moon Transit: 12:27 AM
Moonset: 5:00 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:21 AM - 10:51 AM

Minor Periods

8:12 PM - 9:42 PM
4:30 AM - 6:00 AM

Action Rating: 5 out of 5

Tuesday, June 30, 2026

Weather Forecast

Sunny
68.5°F
40.3°F
54.1°F
31%
0 in
1%
0%
15.7 mph
10.8


Air Quality

AQI: 1 - Good
PM2.5: 2.81 μg/m3
PM10: 3.38 μg/m3
Carbon Monoxide: 95.21 μg/m3
Nitrogen Dioxide: 2.23 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 94.08 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 44 mins
Moonrise: 9:22 PM
Moon Transit: 1:18 AM
Moonset: 5:57 AM
Moon Phase: Full
Moon Illumination: 98.6%

Best Times for Fishing or Hunting

Major Periods

12:48 AM - 3:18 AM
9:12 AM - 11:42 AM

Minor Periods

8:52 PM - 10:22 PM
5:27 AM - 6:57 AM

Action Rating: 5 out of 5

Wednesday, July 1, 2026

Weather Forecast

Sunny
70°F
39.2°F
54.1°F
28%
0 in
0%
0%
17.9 mph
11


Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 6.08 μg/m3
Carbon Monoxide: 102.35 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 103.21 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 44 mins
Moonrise: 9:56 PM
Moon Transit: 2:07 AM
Moonset: 6:58 AM
Moon Phase: Full
Moon Illumination: 94.7%

Best Times for Fishing or Hunting

Major Periods

1:37 AM - 4:07 AM
10:01 AM - 12:31 AM

Minor Periods

9:26 PM - 10:56 PM
6:28 AM - 7:58 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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