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

Current Water Temperature

52.2°F

Measurement Time: Thursday, September 4, 2025, 5:30 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

52.5°F
Partly Cloudy
Conditions: Partly Cloudy
Humidity: 78%
Feels Like: 49.6°F
Wind: W 8.7 mph
Wind Gusts: 10 mph
Pressure: 29.72 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 2.4

Five Day Weather Forecast

Overcast
Thu
H: 60°F
L: 46°F
Moderate rain
Fri
H: 59°F
L: 47°F
Patchy rain nearby
Sat
H: 59°F
L: 49°F
Patchy rain nearby
Sun
H: 57°F
L: 43°F
Sunny
Mon
H: 69°F
L: 40°F

Air Quality

AQI: 1 - Good
PM2.5: 4.63 μg/m3
PM10: 4.63 μg/m3
Carbon Monoxide: 316.35 μg/m3
Nitrogen Dioxide: 0.93 μg/m3
Sulphur Dioxide: 0.19 μg/m3
Ozone: 68 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 1:36 PM
Sunset: 8:08 PM
Daylight: 13 hrs 4 mins
Moonrise: 6:56 PM
Moon Transit: 11:30 PM
Moonset: 2:59 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.3%

Best Times for Fishing or Hunting

Major Periods

11:20 AM - 1:50 PM
12:00 AM - 12:00 AM

Minor Periods

6:26 PM - 7:56 PM
2:29 AM - 3:59 AM

Action Rating: 3 out of 5

Beach Hazards Statement issued September 4 at 4:13AM EDT until September 4 at 10:00PM EDT by NWS Gaylord MI

Effective: Thu September 4, 2025, 4:13 AM
Expires: Thu September 4, 2025, 12:15 PM

* WHAT...Dangerous swimming conditions due to 3 to 5 foot waves and rip currents expected. * WHERE...Emmet and Charlevoix Counties. * WHEN...From 1 PM EDT this afternoon through this evening. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers.

Remain out of the water to avoid hazardous swimming conditions.
Thursday, September 4, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 52.5°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 10.7 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 2.52 μg/m3
PM10: 2.55 μg/m3
Carbon Monoxide: 294.67 μg/m3
Nitrogen Dioxide: 2.17 μg/m3
Sulphur Dioxide: 0.26 μg/m3
Ozone: 55.12 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 1:36 PM
Sunset: 8:08 PM
Daylight: 13 hrs 4 mins
Moonrise: 6:56 PM
Moon Transit: 11:30 PM
Moonset: 2:59 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.3%

Best Times for Fishing or Hunting

Major Periods

11:20 AM - 1:50 PM
12:00 AM - 12:00 AM

Minor Periods

6:26 PM - 7:56 PM
2:29 AM - 3:59 AM

Action Rating: 3 out of 5

Friday, September 5, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 53.7°F
Average Humidity: 74%
Chance of Rain: 88%
Wind: 19.5 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 7.77 μg/m3
PM10: 7.87 μg/m3
Carbon Monoxide: 333.07 μg/m3
Nitrogen Dioxide: 3.94 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 70.16 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 1:36 PM
Sunset: 8:07 PM
Daylight: 13 hrs 1 mins
Moonrise: 7:22 PM
Moon Transit: 12:00 AM
Moonset: 4:14 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:12 AM - 2:42 PM

Minor Periods

6:52 PM - 8:22 PM
3:44 AM - 5:14 AM

Action Rating: 3 out of 5

Saturday, September 6, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 53.3°F
Average Humidity: 69%
Chance of Rain: 84%
Wind: 9.6 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 5.94 μg/m3
PM10: 6.02 μg/m3
Carbon Monoxide: 281.72 μg/m3
Nitrogen Dioxide: 2.95 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 60 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:36 PM
Sunset: 8:05 PM
Daylight: 12 hrs 58 mins
Moonrise: 7:45 PM
Moon Transit: 12:21 AM
Moonset: 5:31 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:02 PM - 3:32 PM

Minor Periods

7:15 PM - 8:45 PM
5:01 AM - 6:31 AM

Action Rating: 3 out of 5

Sunday, September 7, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 49.2°F
Average Humidity: 81%
Chance of Rain: 88%
Wind: 11 mph
UV Index: 0.9

Air Quality

AQI: 1 - Good
PM2.5: 3.4 μg/m3
PM10: 3.41 μg/m3
Carbon Monoxide: 297.48 μg/m3
Nitrogen Dioxide: 3.03 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 58.32 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:35 PM
Sunset: 8:03 PM
Daylight: 12 hrs 55 mins
Moonrise: 8:06 PM
Moon Transit: 1:10 AM
Moonset: 6:49 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:40 AM - 3:10 AM
1:50 PM - 4:20 PM

Minor Periods

7:36 PM - 9:06 PM
6:19 AM - 7:49 AM

Action Rating: 4 out of 5

Monday, September 8, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 53.3°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 8.1 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 3.83 μg/m3
PM10: 3.93 μg/m3
Carbon Monoxide: 334 μg/m3
Nitrogen Dioxide: 5.71 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 52.62 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 1:35 PM
Sunset: 8:01 PM
Daylight: 12 hrs 52 mins
Moonrise: 8:26 PM
Moon Transit: 2:00 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
2:58 PM - 5:28 PM

Minor Periods

7:56 PM - 9:26 PM
7:37 AM - 9:07 AM

Action Rating: 5 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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