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

Current Water Temperature

45.5°F 7.5°C
Frigid Dangerously Cold
45.5°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Wednesday, November 11, 2026, 10:00 AM EST

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

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

48.7°F
Overcast
Conditions: Overcast
Humidity: 72%
Feels Like: 45.3°F
Wind: S 2.5 mph
Wind Gusts: 6 mph
Pressure: 29.83 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 14.1 mi
UV Index: 0.3

Five-Day Weather Forecast

Moderate Drizzle
Wed
H: 51°F
L: 33°F
Moderate Snow
Thu
H: 42°F
L: 32°F
Light Snow
Fri
H: 36°F
L: 32°F
Light Snow
Sat
H: 41°F
L: 29°F
Overcast
Sun
H: 39°F
L: 35°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
0.9 μg/m³
Good
PM10
1.1 μg/m³
Good
Ozone (O3)
60 μg/m³
Photochemical
NO2
1.9 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
156 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 45m daylight
Sunrise 7:29 AM
Solar Noon 12:21 PM
Sunset 5:14 PM
Moon
New • 2%
Moonrise 10:13 AM
Transit 2:17 PM
Moonset 6:21 PM

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
1:47 PM - 4:17 PM

Minor Periods

9:43 AM - 11:13 AM
5:51 PM - 7:21 PM
Action Rating:
Good Action 3/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Moderate Drizzle
Average Temperature: 41.4°F
Average Humidity: 79%
Chance of Rain: 51%
Wind: 7.3 mph
UV Index: 2

Air Quality

EPA Index 1 • Good
PM2.5
2.2 μg/m³
Good
PM10
2.2 μg/m³
Good
Ozone (O3)
49.5 μg/m³
Photochemical
NO2
3.3 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
181.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 45m daylight
Sunrise 7:29 AM
Solar Noon 12:21 PM
Sunset 5:14 PM
Moon
New • 2%
Moonrise 10:13 AM
Transit 2:17 PM
Moonset 6:21 PM

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
1:47 PM - 4:17 PM

Minor Periods

9:43 AM - 11:13 AM
5:51 PM - 7:21 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Moderate Snow
Average Temperature: 36.3°F
Average Humidity: 88%
Chance of Rain: 71%
Wind: 13.2 mph
UV Index: 1.2

Air Quality

EPA Index 1 • Good
PM2.5
0.7 μg/m³
Good
PM10
0.8 μg/m³
Good
Ozone (O3)
68.6 μg/m³
Photochemical
NO2
0.9 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
126.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 42m daylight
Sunrise 7:30 AM
Solar Noon 12:22 PM
Sunset 5:13 PM
Moon
Waxing Crescent • 6%
Moonrise 11:06 AM
Transit 3:09 PM
Moonset 7:13 PM

Best Times for Fishing or Hunting

Major Periods

2:13 AM - 4:43 AM
2:39 PM - 5:09 PM

Minor Periods

10:36 AM - 12:06 PM
6:43 PM - 8:13 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Light Snow
Average Temperature: 33.1°F
Average Humidity: 77%
Chance of Rain: 8%
Wind: 10.1 mph
UV Index: 1.8

Air Quality

EPA Index 1 • Good
PM2.5
0.2 μg/m³
Good
PM10
0.2 μg/m³
Good
Ozone (O3)
65.6 μg/m³
Photochemical
NO2
0.9 μg/m³
Nitrogen Dioxide
SO2
0.1 μg/m³
Sulfur Dioxide
CO
113.8 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 40m daylight
Sunrise 7:32 AM
Solar Noon 12:22 PM
Sunset 5:12 PM
Moon
Waxing Crescent • 13%
Moonrise 11:51 AM
Transit 4:00 PM
Moonset 8:13 PM

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
3:30 PM - 6:00 PM

Minor Periods

11:21 AM - 12:51 PM
7:43 PM - 9:13 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Light Snow
Average Temperature: 33.4°F
Average Humidity: 80%
Chance of Rain: 4%
Wind: 6.8 mph
UV Index: 2.5

Air Quality

EPA Index 1 • Good
PM2.5
0.4 μg/m³
Good
PM10
0.5 μg/m³
Good
Ozone (O3)
55.2 μg/m³
Photochemical
NO2
1.4 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
115.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 38m daylight
Sunrise 7:33 AM
Solar Noon 12:22 PM
Sunset 5:11 PM
Moon
Waxing Crescent • 21%
Moonrise 12:27 PM
Transit 4:48 PM
Moonset 9:16 PM

Best Times for Fishing or Hunting

Major Periods

3:54 AM - 6:24 AM
4:18 PM - 6:48 PM

Minor Periods

11:57 AM - 1:27 PM
8:46 PM - 10:16 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 36.7°F
Average Humidity: 67%
Chance of Rain: 1%
Wind: 7.1 mph
UV Index: 1.7

Air Quality

EPA Index 1 • Good
PM2.5
0.6 μg/m³
Good
PM10
0.7 μg/m³
Good
Ozone (O3)
58.8 μg/m³
Photochemical
NO2
1.3 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
116.8 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 35m daylight
Sunrise 7:34 AM
Solar Noon 12:22 PM
Sunset 5:10 PM
Moon
Waxing Crescent • 31%
Moonrise 12:56 PM
Transit 5:35 PM
Moonset 10:22 PM

Best Times for Fishing or Hunting

Major Periods

4:42 AM - 7:12 AM
5:05 PM - 7:35 PM

Minor Periods

12:26 PM - 1:56 PM
9:52 PM - 11:22 PM
Action Rating:
Very Good 4/5
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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