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

Current Water Temperature

66.6°F

Measurement Time: Saturday, July 18, 2026, 12:30 PM EDT

Temperature Locations

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Local Points of Interest

Au Sable State Forest-Grayling Unit; Luzerne, MI

South Branch Au Sable River

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

Elevation Above Sea Level: 1,070 feet

Nearest Address:
7801 Old M-72
Grayling, MI 49738
Crawford County

GPS Coordinates: 44.61473849, -84.455575

Nearby Water Temperatures

North Branch Au Sable River, Grayling, MI (7.3 mi)
Au Sable River, Luzerne, MI (9.1 mi)
Au Sable River, Mio, MI (16.3 mi)
Manistee River, Grayling, MI (20 mi)
Au Sable River, Curran, MI (30.4 mi)
Au Sable River, Glennie, MI (32.3 mi)
Au Sable River, South Branch, MI (37.6 mi)
Au Sable River, Glennie, MI (40 mi)
Rifle River, Sterling, MI (43.2 mi)
Au Sable River, Oscoda, MI (44.6 mi)
Au Sable River, Oscoda, MI (51.8 mi)
Thunder Bay River, Alpena, MI (59.1 mi)
Manistee River, Mesick, MI (62.5 mi)
Little Traverse Bay, Petoskey, MI (62.7 mi)
Lake Huron, Alpena, MI (63.6 mi)

Weather for Grayling, Michigan

Current Weather

66.9°F
Overcast
Overcast
66.9°F
76.7°F
76%
NNW 11.4 mph
13.1 mph
72.9°F
61°F
0 in
100%
8 mi
1012 mbar
0.6

Five Day Weather Forecast

Sunny
Sat
H: 78°F
L: 63°F
Sunny
Sun
H: 80°F
L: 54°F
Sunny
Mon
H: 83°F
L: 58°F
Patchy rain nearby
Tue
H: 77°F
L: 58°F
Sunny
Wed
H: 73°F
L: 52°F

Air Quality

AQI: 1 - Good
PM2.5: 9.3 μg/m3
PM10: 9.4 μg/m3
Carbon Monoxide: 403 μg/m3
Nitrogen Dioxide: 0.4 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:44 PM
Sunset: 9:18 PM
Daylight: 15 hrs 8 mins
Moonrise: 11:17 AM
Moon Transit: 5:32 PM
Moonset: 12:15 AM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

5:25 AM - 7:55 AM
5:02 PM - 7:32 PM

Minor Periods

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

Action Rating: 2 out of 5

Saturday, July 18, 2026

Weather Forecast

Sunny
78.4°F
62.6°F
72.6°F
77%
0.06 in
57%
0%
15 mph
3.6


Air Quality

AQI: 2 - Moderate
PM2.5: 21.55 μg/m3
PM10: 21.91 μg/m3
Carbon Monoxide: 344.79 μg/m3
Nitrogen Dioxide: 1.15 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 114.08 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:44 PM
Sunset: 9:18 PM
Daylight: 15 hrs 8 mins
Moonrise: 11:17 AM
Moon Transit: 5:32 PM
Moonset: 12:15 AM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

5:25 AM - 7:55 AM
5:02 PM - 7:32 PM

Minor Periods

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

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
79.7°F
54.1°F
66.3°F
64%
0 in
5%
0%
6.5 mph
8.2


Air Quality

AQI: 2 - Moderate
PM2.5: 30.66 μg/m3
PM10: 30.96 μg/m3
Carbon Monoxide: 260.29 μg/m3
Nitrogen Dioxide: 1.53 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 90.5 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:44 PM
Sunset: 9:17 PM
Daylight: 15 hrs 6 mins
Moonrise: 12:28 AM
Moon Transit: 6:16 PM
Moonset: 12:34 AM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

6:10 AM - 8:40 AM
5:46 PM - 8:16 PM

Minor Periods

11:58 AM - 1:28 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
82.7°F
57.6°F
68.9°F
63%
0.13 in
57%
0%
13.2 mph
6.7


Air Quality

AQI: 2 - Moderate
PM2.5: 16.69 μg/m3
PM10: 16.83 μg/m3
Carbon Monoxide: 242.38 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 107.38 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:44 PM
Sunset: 9:16 PM
Daylight: 15 hrs 4 mins
Moonrise: 1:36 PM
Moon Transit: 7:00 PM
Moonset: 12:53 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

6:53 AM - 9:23 AM
6:30 PM - 9:00 PM

Minor Periods

1:06 PM - 2:36 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Patchy rain nearby
77.3°F
58.3°F
68.2°F
82%
0.26 in
82%
0%
16.3 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 6.23 μg/m3
PM10: 6.3 μg/m3
Carbon Monoxide: 167.62 μg/m3
Nitrogen Dioxide: 1.4 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 103.21 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:44 PM
Sunset: 9:15 PM
Daylight: 15 hrs 2 mins
Moonrise: 2:45 PM
Moon Transit: 7:43 PM
Moonset: 12:12 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

7:37 AM - 10:07 AM
7:13 PM - 9:43 PM

Minor Periods

2:15 PM - 3:45 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
72.9°F
52.3°F
61.8°F
54%
0 in
4%
0%
13 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 6.2 μg/m3
PM10: 6.31 μg/m3
Carbon Monoxide: 222 μg/m3
Nitrogen Dioxide: 1.61 μg/m3
Sulphur Dioxide: 0.21 μg/m3
Ozone: 63.33 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:44 PM
Sunset: 9:14 PM
Daylight: 15 hrs mins
Moonrise: 3:52 PM
Moon Transit: 8:29 PM
Moonset: 12:34 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
7:59 PM - 10:29 PM

Minor Periods

3:22 PM - 4:52 PM
12:04 AM - 1:34 AM

Action Rating: 2 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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