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

Current Water Temperature

35.2°F

Measurement Time: Monday, February 9, 2026, 4:00 AM PST

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

41.4°F
Cloudy
Cloudy
37.8°F
34.1°F
48%
NNE 5.4 mph
6.2 mph
28.3°F
30.4°F
0 in
0%
9 mi
1025 mbar
2.4

Five Day Weather Forecast

Overcast
Mon
H: 37°F
L: 23°F
Moderate or heavy snow showers
Tue
H: 36°F
L: 25°F
Moderate or heavy snow showers
Wed
H: 34°F
L: 24°F
Light freezing rain
Thu
H: 32°F
L: 10°F
Sunny
Fri
H: 37°F
L: 13°F

Air Quality

AQI: 1 - Good
PM2.5: 5.78 μg/m3
PM10: 6.88 μg/m3
Carbon Monoxide: 156.68 μg/m3
Nitrogen Dioxide: 2.88 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 95 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:10 AM
Sunset: 5:29 PM
Daylight: 10 hrs 37 mins
Moonrise: 12:52 AM
Moon Transit: 5:47 AM
Moonset: 10:37 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

5:17 AM - 7:47 AM
1:40 PM - 4:10 PM

Minor Periods

10:07 AM - 11:37 AM
12:22 AM - 1:52 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued February 8 at 11:44AM PST until February 11 at 4:00PM PST by NWS Reno NV

Effective: Sun February 8, 2026, 11:44 AM
Expires: Mon February 9, 2026, 3:15 PM

* WHAT...Snow. Snow accumulations of 4 to 8 inches along and just west of Highway 395 from June Lake to Mammoth Lakes. Above 8000 feet, 6 to 12 inches with up to 18 inches along the Sierra crest. Along Highway 395 near Bridgeport and Lee Vining, up to 2 inches. Winds gusting as high as 35 mph, with gusts reaching 75 mph along the Sierra crest. * WHERE...Mono County. * WHEN...From 10 PM Monday to 4 PM PST Wednesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday morning and evening commutes, as well as the Wednesday morning commute. Gusty winds could bring down tree branches.

Slow down and use caution while traveling. Keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Monday, February 9, 2026

Weather Forecast

Overcast
37.2°F
22.8°F
29.1°F
90%
0 in
0%
0%
7.4 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.64 μg/m3
PM10: 5.87 μg/m3
Carbon Monoxide: 129.6 μg/m3
Nitrogen Dioxide: 1.64 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 102.92 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:10 AM
Sunset: 5:29 PM
Daylight: 10 hrs 37 mins
Moonrise: 12:52 AM
Moon Transit: 5:47 AM
Moonset: 10:37 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

5:17 AM - 7:47 AM
1:40 PM - 4:10 PM

Minor Periods

10:07 AM - 11:37 AM
12:22 AM - 1:52 AM

Action Rating: 2 out of 5

Tuesday, February 10, 2026

Weather Forecast

Moderate or heavy snow showers
36.1°F
25.2°F
30.2°F
86%
0.13 in
82%
3%
9.2 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.95 μg/m3
PM10: 5.68 μg/m3
Carbon Monoxide: 136.36 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 1.26 μg/m3
Ozone: 92.92 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:10 AM
Sunset: 5:30 PM
Daylight: 10 hrs 39 mins
Moonrise: 1:53 AM
Moon Transit: 6:35 AM
Moonset: 11:13 AM
Moon Phase: Last Quarter
Moon Illumination: 30.3%

Best Times for Fishing or Hunting

Major Periods

6:05 AM - 8:35 AM
2:30 PM - 5:00 PM

Minor Periods

10:43 AM - 12:13 AM
1:23 AM - 2:53 AM

Action Rating: 2 out of 5

Wednesday, February 11, 2026

Weather Forecast

Moderate or heavy snow showers
34.3°F
23.5°F
28.5°F
81%
0.27 in
74%
26%
13.6 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 2.49 μg/m3
PM10: 2.77 μg/m3
Carbon Monoxide: 131.96 μg/m3
Nitrogen Dioxide: 1.73 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 95.08 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:10 AM
Sunset: 5:31 PM
Daylight: 10 hrs 41 mins
Moonrise: 2:53 AM
Moon Transit: 7:25 AM
Moonset: 11:57 AM
Moon Phase: Last Quarter
Moon Illumination: 20.5%

Best Times for Fishing or Hunting

Major Periods

6:55 AM - 9:25 AM
3:20 PM - 5:50 PM

Minor Periods

11:27 AM - 12:57 AM
2:23 AM - 3:53 AM

Action Rating: 4 out of 5

Thursday, February 12, 2026

Weather Forecast

Light freezing rain
31.9°F
10.2°F
22.1°F
87%
0.01 in
89%
20%
6 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 1.58 μg/m3
PM10: 1.85 μg/m3
Carbon Monoxide: 134.46 μg/m3
Nitrogen Dioxide: 1.55 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 95.24 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:10 AM
Sunset: 5:32 PM
Daylight: 10 hrs 43 mins
Moonrise: 3:48 AM
Moon Transit: 8:17 AM
Moonset: 12:48 AM
Moon Phase: Waning Crescent
Moon Illumination: 12.2%

Best Times for Fishing or Hunting

Major Periods

7:47 AM - 10:17 AM
4:12 PM - 6:42 PM

Minor Periods

12:18 AM - 1:48 PM
3:18 AM - 4:48 AM

Action Rating: 2 out of 5

Friday, February 13, 2026

Weather Forecast

Sunny
37°F
12.7°F
23.8°F
71%
0 in
0%
0%
5.8 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.75 μg/m3
PM10: 1.99 μg/m3
Carbon Monoxide: 135.73 μg/m3
Nitrogen Dioxide: 1.59 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 99.15 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:10 AM
Sunset: 5:33 PM
Daylight: 10 hrs 45 mins
Moonrise: 4:37 AM
Moon Transit: 9:10 AM
Moonset: 1:46 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

8:40 AM - 11:10 AM
5:05 PM - 7:35 PM

Minor Periods

1:16 PM - 2:46 PM
4:07 AM - 5:37 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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