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

Current Water Temperature

45.5°F

Measurement Time: Tuesday, March 31, 2026, 6:30 AM 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

38.8°F
Mist
Mist
35°F
44.3°F
93%
E 5.1 mph
7.8 mph
40.6°F
40.7°F
0 in
100%
4 mi
1008 mbar
0.5

Five Day Weather Forecast

Moderate rain
Tue
H: 47°F
L: 37°F
Cloudy
Wed
H: 38°F
L: 28°F
Moderate rain
Thu
H: 46°F
L: 29°F
Moderate rain
Fri
H: 46°F
L: 31°F
Moderate rain
Sat
H: 36°F
L: 31°F

Air Quality

AQI: 1 - Good
PM2.5: 11.25 μg/m3
PM10: 11.75 μg/m3
Carbon Monoxide: 183.85 μg/m3
Nitrogen Dioxide: 3.15 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 78 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 12:00 AM
Sunset: 8:04 PM
Daylight: 12 hrs 44 mins
Moonrise: 6:54 PM
Moon Transit: 12:17 AM
Moonset: 6:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:54 AM - 3:24 PM

Minor Periods

6:24 PM - 7:54 PM
6:08 AM - 7:38 AM

Action Rating: 4 out of 5

Tuesday, March 31, 2026

Weather Forecast

Moderate rain
46.9°F
36.9°F
42.9°F
90%
0.64 in
88%
0%
8.5 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 12.63 μg/m3
PM10: 13.05 μg/m3
Carbon Monoxide: 195.45 μg/m3
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 82.16 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 12:00 AM
Sunset: 8:04 PM
Daylight: 12 hrs 44 mins
Moonrise: 6:54 PM
Moon Transit: 12:17 AM
Moonset: 6:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:54 AM - 3:24 PM

Minor Periods

6:24 PM - 7:54 PM
6:08 AM - 7:38 AM

Action Rating: 4 out of 5

Wednesday, April 1, 2026

Weather Forecast

Cloudy
37.6°F
27.9°F
32.1°F
74%
0 in
0%
0%
10.7 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.72 μg/m3
PM10: 2.95 μg/m3
Carbon Monoxide: 172.05 μg/m3
Nitrogen Dioxide: 2.22 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 1:41 PM
Sunset: 8:06 PM
Daylight: 12 hrs 47 mins
Moonrise: 8:02 PM
Moon Transit: 1:00 AM
Moonset: 6:55 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
1:37 PM - 4:07 PM

Minor Periods

7:32 PM - 9:02 PM
6:25 AM - 7:55 AM

Action Rating: 3 out of 5

Thursday, April 2, 2026

Weather Forecast

Moderate rain
46.2°F
29.3°F
37.7°F
86%
0.76 in
84%
16%
15.7 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 1.69 μg/m3
PM10: 1.97 μg/m3
Carbon Monoxide: 163.49 μg/m3
Nitrogen Dioxide: 2.47 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 88.96 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 1:41 PM
Sunset: 8:07 PM
Daylight: 12 hrs 50 mins
Moonrise: 9:09 PM
Moon Transit: 1:42 AM
Moonset: 7:13 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
2:19 PM - 4:49 PM

Minor Periods

8:39 PM - 10:09 PM
6:43 AM - 8:13 AM

Action Rating: 3 out of 5

Friday, April 3, 2026

Weather Forecast

Moderate rain
46.2°F
31.3°F
44.8°F
83%
0.68 in
80%
0%
20.4 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 1.43 μg/m3
PM10: 1.45 μg/m3
Carbon Monoxide: 164.57 μg/m3
Nitrogen Dioxide: 3.11 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 78.84 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 1:41 PM
Sunset: 8:08 PM
Daylight: 12 hrs 53 mins
Moonrise: 10:18 PM
Moon Transit: 2:25 AM
Moonset: 7:32 AM
Moon Phase: Full
Moon Illumination: 96.6%

Best Times for Fishing or Hunting

Major Periods

1:55 AM - 4:25 AM
3:03 PM - 5:33 PM

Minor Periods

9:48 PM - 11:18 PM
7:02 AM - 8:32 AM

Action Rating: 4 out of 5

Saturday, April 4, 2026

Weather Forecast

Moderate rain
36.4°F
30.8°F
34.2°F
93%
0.72 in
87%
30%
13.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.3 μg/m3
PM10: 1.3 μg/m3
Carbon Monoxide: 165.6 μg/m3
Nitrogen Dioxide: 2.1 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:40 PM
Sunset: 8:09 PM
Daylight: 12 hrs 56 mins
Moonrise: 11:25 PM
Moon Transit: 3:10 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 91.3%

Best Times for Fishing or Hunting

Major Periods

2:40 AM - 5:10 AM
3:49 PM - 6:19 PM

Minor Periods

12:00 AM - 12:00 AM
7:25 AM - 8:55 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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