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

Current Water Temperature

70.3°F

Measurement Time: Monday, July 27, 2026, 2:30 PM 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

70°F
Heavy rain
Heavy rain
57.9°F
75.5°F
95%
ENE 8.7 mph
13.6 mph
70°F
68.4°F
1.03 in
79%
4 mi
1001 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 86°F
L: 66°F
Sunny
Tue
H: 78°F
L: 63°F
Sunny
Wed
H: 80°F
L: 55°F
Sunny
Thu
H: 85°F
L: 56°F
Sunny
Fri
H: 82°F
L: 60°F

Air Quality

AQI: 1 - Good
PM2.5: 8.2 μg/m3
PM10: 8.5 μg/m3
Carbon Monoxide: 138 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 78 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:44 PM
Sunset: 9:09 PM
Daylight: 14 hrs 50 mins
Moonrise: 8:27 PM
Moon Transit: 12:00 AM
Moonset: 3:56 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:31 AM - 3:01 PM

Minor Periods

7:57 PM - 9:27 PM
3:26 AM - 4:56 AM

Action Rating: 3 out of 5

Flood Advisory issued July 27 at 7:01PM EDT until July 27 at 10:00PM EDT by NWS Gaylord MI

Effective: Mon July 27, 2026, 7:01 PM
Expires: Mon July 27, 2026, 10:00 PM

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of northern Michigan, including the following county, Oscoda. * WHEN...Until 1000 PM EDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Overflowing poor drainage areas. * ADDITIONAL DETAILS... - At 701 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 2.5 inches of rain have fallen. - Additional rainfall amounts up to 0.5 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Comins and Fairview. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.


Flood Advisory issued July 27 at 7:21PM EDT until July 27 at 10:30PM EDT by NWS Gaylord MI

Effective: Mon July 27, 2026, 7:21 PM
Expires: Mon July 27, 2026, 10:30 PM

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of northern Michigan, including the following counties, Alcona, Alpena and Montmorency. * WHEN...Until 1030 PM EDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Overflowing poor drainage areas. * ADDITIONAL DETAILS... - At 721 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 2 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1.5 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Alpena, Ossineke, Lachine, The Town Of Hubbard Lake, Long Rapids, Hillman, Spratt, Ossineke Township, Fletcher Pond, Hubbard Lake, Royston, Spruce, Lost Lake Woods, Negwegon State Park, Black River, Canada Creek Ranch, Devils Lake and Clear Lake State Park. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.


Monday, July 27, 2026

Weather Forecast

Sunny
86.4°F
65.5°F
74.6°F
79%
3.27 in
76%
0%
11.6 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 14.52 μg/m3
PM10: 15.15 μg/m3
Carbon Monoxide: 145.46 μg/m3
Nitrogen Dioxide: 2.13 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 82.92 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:44 PM
Sunset: 9:09 PM
Daylight: 14 hrs 50 mins
Moonrise: 8:27 PM
Moon Transit: 12:00 AM
Moonset: 3:56 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:31 AM - 3:01 PM

Minor Periods

7:57 PM - 9:27 PM
3:26 AM - 4:56 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
78.4°F
62.7°F
70.1°F
68%
0.31 in
67%
0%
13 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 4.46 μg/m3
PM10: 4.58 μg/m3
Carbon Monoxide: 133.54 μg/m3
Nitrogen Dioxide: 1.04 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 69.46 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 1:44 PM
Sunset: 9:08 PM
Daylight: 14 hrs 48 mins
Moonrise: 9:00 PM
Moon Transit: 12:40 AM
Moonset: 4:59 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:10 AM - 2:40 AM
1:20 PM - 3:50 PM

Minor Periods

8:30 PM - 10:00 PM
4:29 AM - 5:59 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
79.5°F
55.2°F
66.8°F
56%
0 in
3%
0%
11.4 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 2.17 μg/m3
PM10: 2.26 μg/m3
Carbon Monoxide: 108.83 μg/m3
Nitrogen Dioxide: 1.32 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 57.04 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 1:44 PM
Sunset: 9:07 PM
Daylight: 14 hrs 45 mins
Moonrise: 9:26 PM
Moon Transit: 1:29 AM
Moonset: 6:06 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:59 AM - 3:29 AM
2:08 PM - 4:38 PM

Minor Periods

8:56 PM - 10:26 PM
5:36 AM - 7:06 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
85.4°F
56.2°F
69.6°F
56%
0 in
3%
0%
8.3 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 5.74 μg/m3
PM10: 5.96 μg/m3
Carbon Monoxide: 130.72 μg/m3
Nitrogen Dioxide: 2.25 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 67.71 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 1:44 PM
Sunset: 9:06 PM
Daylight: 14 hrs 43 mins
Moonrise: 9:48 PM
Moon Transit: 2:15 AM
Moonset: 7:14 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
2:53 PM - 5:23 PM

Minor Periods

9:18 PM - 10:48 PM
6:44 AM - 8:14 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
82.2°F
60.2°F
70°F
63%
0.07 in
57%
0%
6.9 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 7.7 μg/m3
PM10: 7.83 μg/m3
Carbon Monoxide: 210.78 μg/m3
Nitrogen Dioxide: 3.27 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 45.11 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 1:44 PM
Sunset: 9:04 PM
Daylight: 14 hrs 41 mins
Moonrise: 10:07 PM
Moon Transit: 3:00 AM
Moonset: 8:23 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
3:37 PM - 6:07 PM

Minor Periods

9:37 PM - 11:07 PM
7:53 AM - 9:23 AM

Action Rating: 3 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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