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

Current Water Temperature

42.4°F

Measurement Time: Wednesday, October 29, 2025, 12:30 AM EDT

Temperature Locations

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Local Points of Interest

Au Sable State Forest-Grayling Unit; Luzerne, MI

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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 / 326 meters

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 (20.0 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 (40.0 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

33.1°F
Clear
Conditions: Clear
Humidity: 96%
Feels Like: 28.4°F
Wind: ENE 4.9 mph
Wind Gusts: 10.3 mph
Pressure: 30.22 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Partly Cloudy
Wed
H: 53°F
L: 35°F
Overcast
Thu
H: 46°F
L: 37°F
Overcast
Fri
H: 39°F
L: 34°F
Partly Cloudy
Sat
H: 46°F
L: 34°F
Partly Cloudy
Sun
H: 49°F
L: 32°F

Air Quality

AQI: 1 - Good
PM2.5: 3.45 μg/m3
PM10: 3.45 μg/m3
Carbon Monoxide: 156.85 μg/m3
Nitrogen Dioxide: 3.95 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 58 μg/m3

Astronomical

Sunrise: 8:12 AM
Sun Transit: 1:21 PM
Sunset: 6:31 PM
Daylight: 10 hrs 19 mins
Moonrise: 3:21 PM
Moon Transit: 7:58 PM
Moonset: 12:34 AM
Moon Phase: First Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

7:50 AM - 10:20 AM
7:28 PM - 9:58 PM

Minor Periods

2:51 PM - 4:21 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, October 29, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 42.7°F
Average Humidity: 78%
Chance of Rain: 0%
Wind: 10.3 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 2.73 μg/m3
PM10: 2.75 μg/m3
Carbon Monoxide: 151.85 μg/m3
Nitrogen Dioxide: 3.21 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 65.16 μg/m3

Astronomical

Sunrise: 8:12 AM
Sun Transit: 1:21 PM
Sunset: 6:31 PM
Daylight: 10 hrs 19 mins
Moonrise: 3:21 PM
Moon Transit: 7:58 PM
Moonset: 12:34 AM
Moon Phase: First Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

7:50 AM - 10:20 AM
7:28 PM - 9:58 PM

Minor Periods

2:51 PM - 4:21 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, October 30, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 42.5°F
Average Humidity: 75%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 2.29 μg/m3
PM10: 2.31 μg/m3
Carbon Monoxide: 148.29 μg/m3
Nitrogen Dioxide: 3.72 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 61.48 μg/m3

Astronomical

Sunrise: 8:13 AM
Sun Transit: 1:21 PM
Sunset: 6:29 PM
Daylight: 10 hrs 16 mins
Moonrise: 3:46 PM
Moon Transit: 8:47 PM
Moonset: 12:45 AM
Moon Phase: First Quarter
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

8:39 AM - 11:09 AM
8:17 PM - 10:47 PM

Minor Periods

3:16 PM - 4:46 PM
12:15 AM - 1:45 AM

Action Rating: 3 out of 5

Friday, October 31, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 37.3°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 11.6 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 1.89 μg/m3
PM10: 1.93 μg/m3
Carbon Monoxide: 140.93 μg/m3
Nitrogen Dioxide: 3.04 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 70.32 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 1:21 PM
Sunset: 6:28 PM
Daylight: 10 hrs 13 mins
Moonrise: 4:08 PM
Moon Transit: 9:34 PM
Moonset: 1:58 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

9:26 AM - 11:56 AM
9:04 PM - 11:34 PM

Minor Periods

3:38 PM - 5:08 PM
1:28 AM - 2:58 AM

Action Rating: 2 out of 5

Saturday, November 1, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 39.3°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 5.6 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 1.82 μg/m3
PM10: 1.87 μg/m3
Carbon Monoxide: 147.09 μg/m3
Nitrogen Dioxide: 2.17 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 62.96 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 1:21 PM
Sunset: 6:26 PM
Daylight: 10 hrs 10 mins
Moonrise: 4:29 PM
Moon Transit: 12:00 AM
Moonset: 3:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:13 AM - 12:43 AM

Minor Periods

3:59 PM - 5:29 PM
2:42 AM - 4:12 AM

Action Rating: 2 out of 5

Sunday, November 2, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 38.9°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 5.4 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.65 μg/m3
PM10: 2.7 μg/m3
Carbon Monoxide: 175.47 μg/m3
Nitrogen Dioxide: 4.62 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 51.85 μg/m3

Astronomical

Sunrise: 8:18 AM
Sun Transit: 1:21 PM
Sunset: 6:25 PM
Daylight: 10 hrs 8 mins
Moonrise: 4:48 PM
Moon Transit: 12:31 AM
Moonset: 4:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.9%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 PM
12:01 AM - 2:31 PM

Minor Periods

4:18 PM - 5:48 PM
3:59 AM - 5:29 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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