Water Temperature of the Au Sable River in South Branch, MI

Current Water Temperature

72.9°F

Measurement Time: Sunday, August 2, 2026, 7:45 AM EDT

Temperature Locations

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Local Points of Interest

Loud Dam Pond

Au Sable River

Station Name: AU SABLE RIVER NEAR SOUTH BRANCH, MI
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 722 feet

Nearest Address:
4980 Loud Dam Rd
South Branch, MI 48737
Iosco County

GPS Coordinates: 44.46334886, -83.7213714

Nearby Water Temperatures

Au Sable River, Glennie, MI (2.4 mi)
Au Sable River, Oscoda, MI (7.4 mi)
Au Sable River, Glennie, MI (7.8 mi)
Au Sable River, Curran, MI (11.8 mi)
Au Sable River, Oscoda, MI (14.3 mi)
Au Sable River, Mio, MI (24.3 mi)
Rifle River, Sterling, MI (30.8 mi)
Au Sable River, Luzerne, MI (31.7 mi)
South Branch Au Sable River, Grayling, MI (37.6 mi)
North Branch Au Sable River, Grayling, MI (38.6 mi)
Lake Huron, Alpena, MI (42.5 mi)
Thunder Bay River, Alpena, MI (43.8 mi)
Manistee River, Grayling, MI (57.6 mi)
Lake Huron, Port Austin, MI (65.7 mi)
Tittabawassee River, Freeland, MI (67.9 mi)

Weather for South Branch, Michigan

Current Weather

72.1°F
Patchy light rain
Patchy light rain
72°F
76.4°F
78%
NNE 9.8 mph
12 mph
72.1°F
65.1°F
0.03 in
53%
6 mi
1011 mbar
2.4

Five Day Weather Forecast

Sunny
Sun
H: 74°F
L: 64°F
Sunny
Mon
H: 83°F
L: 54°F
Sunny
Tue
H: 88°F
L: 56°F
Sunny
Wed
H: 87°F
L: 60°F
Sunny
Thu
H: 77°F
L: 59°F

Air Quality

AQI: 1 - Good
PM2.5: 3 μg/m3
PM10: 3.1 μg/m3
Carbon Monoxide: 118 μg/m3
Nitrogen Dioxide: 0.3 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 62 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:41 PM
Sunset: 8:59 PM
Daylight: 14 hrs 35 mins
Moonrise: 10:41 PM
Moon Transit: 6:50 PM
Moonset: 10:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

6:20 PM - 8:50 PM
6:20 PM - 8:50 PM

Minor Periods

10:11 PM - 11:41 PM
10:07 AM - 11:37 AM

Action Rating: 4 out of 5

Small Craft Advisory issued August 2 at 3:47AM EDT until August 2 at 10:00PM EDT by NWS Detroit/Pontiac MI

Effective: Sun August 2, 2026, 3:47 AM
Expires: Sun August 2, 2026, 10:00 PM

* WHAT...Expect sustained winds up to 20 knots from the northeast with gusts up to 30 knots. The largest significant waves will be 5 feet with a potential maximum wave height of 7 feet. * WHERE...Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay and Inner Saginaw Bay SW of Point Au Gres to Bay Port MI. * WHEN...The maximum winds are expected around 4 PM EDT Sunday with the largest waves expected around 6 PM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Sunday, August 2, 2026

Weather Forecast

Sunny
74.1°F
63.9°F
68.9°F
79%
0.06 in
57%
0%
11.6 mph
4.2


Air Quality

AQI: 1 - Good
PM2.5: 4.5 μg/m3
PM10: 4.73 μg/m3
Carbon Monoxide: 122.29 μg/m3
Nitrogen Dioxide: 0.93 μg/m3
Sulphur Dioxide: 0.49 μg/m3
Ozone: 66.42 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:41 PM
Sunset: 8:59 PM
Daylight: 14 hrs 35 mins
Moonrise: 10:41 PM
Moon Transit: 6:50 PM
Moonset: 10:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

6:20 PM - 8:50 PM
6:20 PM - 8:50 PM

Minor Periods

10:11 PM - 11:41 PM
10:07 AM - 11:37 AM

Action Rating: 4 out of 5

Monday, August 3, 2026

Weather Forecast

Sunny
83°F
54.1°F
67°F
52%
0 in
2%
0%
7.2 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 2.88 μg/m3
PM10: 3.03 μg/m3
Carbon Monoxide: 111.88 μg/m3
Nitrogen Dioxide: 1.69 μg/m3
Sulphur Dioxide: 0.47 μg/m3
Ozone: 59.17 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 1:41 PM
Sunset: 8:57 PM
Daylight: 14 hrs 33 mins
Moonrise: 11:00 PM
Moon Transit: 5:07 AM
Moonset: 11:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

4:37 AM - 7:07 AM
5:51 PM - 8:21 PM

Minor Periods

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

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Sunny
88°F
55.6°F
70.5°F
54%
0 in
2%
0%
10.1 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 3.9 μg/m3
Carbon Monoxide: 122.5 μg/m3
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 75.42 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:41 PM
Sunset: 8:56 PM
Daylight: 14 hrs 31 mins
Moonrise: 12:00 AM
Moon Transit: 5:52 AM
Moonset: 1:00 PM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
6:38 PM - 9:08 PM

Minor Periods

12:30 AM - 2:00 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, August 5, 2026

Weather Forecast

Sunny
86.6°F
60.2°F
72.3°F
60%
0 in
5%
0%
10.1 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 4.34 μg/m3
PM10: 4.53 μg/m3
Carbon Monoxide: 147.05 μg/m3
Nitrogen Dioxide: 2.75 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 75.63 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 1:40 PM
Sunset: 8:55 PM
Daylight: 14 hrs 28 mins
Moonrise: 12:22 AM
Moon Transit: 6:41 AM
Moonset: 2:16 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

6:11 AM - 8:41 AM
7:30 PM - 10:00 PM

Minor Periods

1:46 PM - 3:16 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
77.3°F
59.1°F
64.8°F
85%
0.31 in
79%
0%
6.9 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 3.49 μg/m3
PM10: 3.64 μg/m3
Carbon Monoxide: 186.78 μg/m3
Nitrogen Dioxide: 3.27 μg/m3
Sulphur Dioxide: 0.39 μg/m3
Ozone: 47.44 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 1:40 PM
Sunset: 8:53 PM
Daylight: 14 hrs 26 mins
Moonrise: 12:50 AM
Moon Transit: 7:35 AM
Moonset: 3:35 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

7:05 AM - 9:35 AM
8:25 PM - 10:55 PM

Minor Periods

3:05 PM - 4:35 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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