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

Current Water Temperature

63.0°F

Measurement Time: Friday, July 24, 2026, 3:00 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

59.6°F
Clear
Clear
48.9°F
59.6°F
52%
SW 6.3 mph
13.2 mph
59.6°F
41.8°F
0 in
3%
6 mi
1018 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 81°F
L: 56°F
Sunny
Sat
H: 80°F
L: 55°F
Sunny
Sun
H: 79°F
L: 52°F
Sunny
Mon
H: 80°F
L: 52°F
Sunny
Tue
H: 81°F
L: 52°F

Air Quality

AQI: 1 - Good
PM2.5: 1.9 μg/m3
PM10: 3.3 μg/m3
Carbon Monoxide: 103 μg/m3
Nitrogen Dioxide: 2.7 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 86 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:02 PM
Sunset: 8:12 PM
Daylight: 14 hrs 18 mins
Moonrise: 4:55 PM
Moon Transit: 9:30 PM
Moonset: 1:21 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:34 AM - 7:04 AM
9:00 PM - 11:30 PM

Minor Periods

4:25 PM - 5:55 PM
12:51 AM - 2:21 AM

Action Rating: 2 out of 5

Flash Flood Warning issued July 24 at 4:27PM PDT until July 24 at 7:30PM PDT by NWS Las Vegas NV

Effective: Fri July 24, 2026, 4:27 PM
Expires: Fri July 24, 2026, 7:30 PM

FFWVEF The National Weather Service in Las Vegas has issued a * Flash Flood Warning for... Northwestern Inyo County in south central California... * Until 730 PM PDT. * At 427 PM PDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Goodale Creek Campground, Tinemaha Campground and Taboose Creek Campground. This includes the Rock Fire area.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Friday, July 24, 2026

Weather Forecast

Sunny
81.2°F
56.2°F
68°F
30%
0 in
1%
0%
17.2 mph
12


Air Quality

AQI: 1 - Good
PM2.5: 2.36 μg/m3
PM10: 3.16 μg/m3
Carbon Monoxide: 92.92 μg/m3
Nitrogen Dioxide: 3.04 μg/m3
Sulphur Dioxide: 0.49 μg/m3
Ozone: 78.88 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:02 PM
Sunset: 8:12 PM
Daylight: 14 hrs 18 mins
Moonrise: 4:55 PM
Moon Transit: 9:30 PM
Moonset: 1:21 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:34 AM - 7:04 AM
9:00 PM - 11:30 PM

Minor Periods

4:25 PM - 5:55 PM
12:51 AM - 2:21 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
79.7°F
54.5°F
66.4°F
39%
0 in
1%
0%
17.4 mph
12.1


Air Quality

AQI: 1 - Good
PM2.5: 2.32 μg/m3
PM10: 4.4 μg/m3
Carbon Monoxide: 96.21 μg/m3
Nitrogen Dioxide: 2.3 μg/m3
Sulphur Dioxide: 0.42 μg/m3
Ozone: 77.83 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:02 PM
Sunset: 8:11 PM
Daylight: 14 hrs 16 mins
Moonrise: 5:50 PM
Moon Transit: 10:21 PM
Moonset: 2:04 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

5:25 AM - 7:55 AM
12:00 AM - 12:00 AM

Minor Periods

5:20 PM - 6:50 PM
1:34 AM - 3:04 AM

Action Rating: 3 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
78.7°F
52.4°F
65.5°F
31%
0 in
1%
0%
15.9 mph
11.6


Air Quality

AQI: 1 - Good
PM2.5: 1.98 μg/m3
PM10: 3.15 μg/m3
Carbon Monoxide: 90.79 μg/m3
Nitrogen Dioxide: 2.2 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 79.5 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:02 PM
Sunset: 8:10 PM
Daylight: 14 hrs 15 mins
Moonrise: 6:40 PM
Moon Transit: 11:13 PM
Moonset: 2:54 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

6:16 AM - 8:46 AM
12:00 AM - 12:00 AM

Minor Periods

6:10 PM - 7:40 PM
2:24 AM - 3:54 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
79.7°F
52.4°F
65.7°F
24%
0 in
1%
0%
15.9 mph
12.5


Air Quality

AQI: 1 - Good
PM2.5: 1.5 μg/m3
PM10: 1.88 μg/m3
Carbon Monoxide: 89.33 μg/m3
Nitrogen Dioxide: 2 μg/m3
Sulphur Dioxide: 0.33 μg/m3
Ozone: 74.88 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 1:02 PM
Sunset: 8:09 PM
Daylight: 14 hrs 13 mins
Moonrise: 7:22 PM
Moon Transit: 12:00 AM
Moonset: 3:49 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:07 AM - 9:37 AM

Minor Periods

6:52 PM - 8:22 PM
3:19 AM - 4:49 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
80.7°F
52.4°F
65.7°F
23%
0 in
1%
0%
15.7 mph
12.3


Air Quality

AQI: 1 - Good
PM2.5: 2.58 μg/m3
PM10: 3.32 μg/m3
Carbon Monoxide: 90.18 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 0.42 μg/m3
Ozone: 80.71 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:02 PM
Sunset: 8:08 PM
Daylight: 14 hrs 11 mins
Moonrise: 7:58 PM
Moon Transit: 12:03 AM
Moonset: 4:50 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:57 AM - 10:27 AM

Minor Periods

7:28 PM - 8:58 PM
4:20 AM - 5:50 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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