Water Temperature of the South Branch Au Sable River in Grayling, MI
Current Water Temperature
41.5°F
				Measurement Time: Thursday, October 30, 2025, 11:30 PM EDT
Temperature Locations
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Local Points of Interest
Au Sable State Forest-Grayling Unit; Luzerne, MISponsored Content
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
36.7°F
				
			Conditions: Partly cloudy
Humidity: 99%
Feels Like: 31.3°F
Wind: NW 6.7 mph
Wind Gusts: 10.3 mph
		
		Humidity: 99%
Feels Like: 31.3°F
Wind: NW 6.7 mph
Wind Gusts: 10.3 mph
			Pressure: 29.67 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0
	Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast

Fri
H: 39°F
L: 35°F

Sat
H: 42°F
L: 34°F

Sun
H: 46°F
L: 31°F

Mon
H: 53°F
L: 38°F

Tue
H: 47°F
L: 40°F
Air Quality
PM2.5:
					
						2.35 μg/m3
						
					
				
										PM10:
					
						2.45 μg/m3
						
					
				
					
			Carbon Monoxide: 138.85 μg/m3
Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 69 μg/m3
	Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 69 μg/m3
Astronomical
			Sunrise: 8:15 AM
Sun Transit: 1:21 PM
Sunset: 6:28 PM
Daylight: 10 hrs 13 mins
		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%
	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 AM9:04 PM - 11:34 PM
Minor Periods
3:38 PM - 5:08 PM1:28 AM - 2:58 AM
Action Rating: 2 out of 5
Friday, October 31, 2025
				Weather Forecast
						Conditions: Overcast 
Average Temperature: 38.5°F
Average Humidity: 78%
					Average Temperature: 38.5°F
Average Humidity: 78%
						Chance of Rain: 0%
Wind: 11.4 mph
UV Index: 0.4
					
					Wind: 11.4 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
					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
						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%
					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 AM9:04 PM - 11:34 PM
Minor Periods
3:38 PM - 5:08 PM1:28 AM - 2:58 AM
Action Rating: 2 out of 5
Saturday, November 1, 2025
				Weather Forecast
						Conditions: Overcast 
Average Temperature: 38.3°F
Average Humidity: 63%
					Average Temperature: 38.3°F
Average Humidity: 63%
						Chance of Rain: 0%
Wind: 8.1 mph
UV Index: 0.3
					
					Wind: 8.1 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
					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
						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%
					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 AM10:13 AM - 12:43 AM
Minor Periods
3:59 PM - 5:29 PM2:42 AM - 4:12 AM
Action Rating: 2 out of 5
Sunday, November 2, 2025
				Weather Forecast
						Conditions: Partly Cloudy 
Average Temperature: 37.3°F
Average Humidity: 66%
					Average Temperature: 37.3°F
Average Humidity: 66%
						Chance of Rain: 0%
Wind: 8.1 mph
UV Index: 0
					
					Wind: 8.1 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
					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
						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%
					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 PM12:01 AM - 2:31 PM
Minor Periods
4:18 PM - 5:48 PM3:59 AM - 5:29 AM
Action Rating: 2 out of 5
Monday, November 3, 2025
				Weather Forecast
						Conditions: Patchy rain nearby
Average Temperature: 44.8°F
Average Humidity: 64%
					Average Temperature: 44.8°F
Average Humidity: 64%
						Chance of Rain: 68%
Wind: 14.5 mph
UV Index: 2
					
					Wind: 14.5 mph
UV Index: 2
Air Quality
AQI:
								
									0 - 									
							
							PM2.5:
								
									0 μg/m3
									
							
							PM10:
								
									0 μg/m3
									
							
						
							Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
					Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
							Sunrise: 8:19 AM
Sun Transit: 1:21 PM
Sunset: 6:24 PM
Daylight: 10 hrs 5 mins
						Sun Transit: 1:21 PM
Sunset: 6:24 PM
Daylight: 10 hrs 5 mins
							Moonrise: 5:09 PM
Moon Transit: 12:00 AM
Moonset: 5:47 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.3%
					Moon Transit: 12:00 AM
Moonset: 5:47 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:51 AM - 2:21 PM
Minor Periods
4:39 PM - 6:09 PM5:17 AM - 6:47 AM
Action Rating: 3 out of 5
Tuesday, November 4, 2025
				Weather Forecast
						Conditions: Patchy rain nearby
Average Temperature: 43.7°F
Average Humidity: 67%
					Average Temperature: 43.7°F
Average Humidity: 67%
						Chance of Rain: 89%
Wind: 14.3 mph
UV Index: 2
					
					Wind: 14.3 mph
UV Index: 2
Air Quality
AQI:
								
									0 - 									
							
							PM2.5:
								
									0 μg/m3
									
							
							PM10:
								
									0 μg/m3
									
							
						
							Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
					Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
							Sunrise: 8:20 AM
Sun Transit: 1:21 PM
Sunset: 6:22 PM
Daylight: 10 hrs 2 mins
						Sun Transit: 1:21 PM
Sunset: 6:22 PM
Daylight: 10 hrs 2 mins
							Moonrise: 5:34 PM
Moon Transit: 12:01 AM
Moonset: 7:10 AM
Moon Phase: Full
Moon Illumination: 99.4%
					Moon Transit: 12:01 AM
Moonset: 7:10 AM
Moon Phase: Full
Moon Illumination: 99.4%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:44 AM - 3:14 PM
Minor Periods
5:04 PM - 6:34 PM6:40 AM - 8:10 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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