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

Current Water Temperature

59.4°F

Measurement Time: Wednesday, May 20, 2026, 8:30 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

35.8°F
Clear
Clear
31.8°F
35.8°F
67%
N 4.3 mph
8.2 mph
31.8°F
26°F
0 in
16%
6 mi
1030 mbar
0

Five Day Weather Forecast

Partly Cloudy
Thu
H: 61°F
L: 34°F
Partly Cloudy
Fri
H: 61°F
L: 38°F
Partly Cloudy
Sat
H: 62°F
L: 46°F
Overcast
Sun
H: 68°F
L: 50°F
Fog
Mon
H: 78°F
L: 58°F

Air Quality

PM2.5: 1.25 μg/m3
PM10: 1.35 μg/m3
Carbon Monoxide: 118.85 μg/m3
Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:34 PM
Sunset: 9:06 PM
Daylight: 15 hrs 2 mins
Moonrise: 10:54 AM
Moon Transit: 6:38 PM
Moonset: 1:36 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

6:26 AM - 8:56 AM
6:08 PM - 8:38 PM

Minor Periods

10:24 AM - 11:54 AM
1:06 AM - 2:36 AM

Action Rating: 4 out of 5

Freeze Warning issued May 20 at 1:35PM EDT until May 21 at 9:00AM EDT by NWS Gaylord MI

Effective: Wed May 20, 2026, 1:35 PM
Expires: Thu May 21, 2026, 9:00 AM

* WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Crawford, Kalkaska, Montmorency, Oscoda, and Otsego Counties. * WHEN...From 1 AM to 9 AM EDT Thursday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Coldest temperatures will be in the high valleys and other typically cold locations. The duration of temperatures at or below freezing will likely be between 2 and 4 hours.

Take steps now to protect tender plants from the cold.


Frost Advisory issued May 20 at 1:35PM EDT until May 21 at 9:00AM EDT by NWS Gaylord MI

Effective: Wed May 20, 2026, 1:35 PM
Expires: Thu May 21, 2026, 9:00 AM

* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...A portion of Northern Lower Michigan. * WHEN...From 1 AM to 9 AM EDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Thursday, May 21, 2026

Weather Forecast

Partly Cloudy
60.9°F
33.7°F
46.8°F
50%
0 in
0%
0%
8.1 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.03 μg/m3
PM10: 2.35 μg/m3
Carbon Monoxide: 121.28 μg/m3
Nitrogen Dioxide: 1.91 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 67.2 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:34 PM
Sunset: 9:06 PM
Daylight: 15 hrs 2 mins
Moonrise: 10:54 AM
Moon Transit: 6:38 PM
Moonset: 1:36 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

6:26 AM - 8:56 AM
6:08 PM - 8:38 PM

Minor Periods

10:24 AM - 11:54 AM
1:06 AM - 2:36 AM

Action Rating: 4 out of 5

Friday, May 22, 2026

Weather Forecast

Partly Cloudy
60.8°F
38°F
48.9°F
49%
0 in
0%
0%
10.5 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 3.37 μg/m3
PM10: 3.69 μg/m3
Carbon Monoxide: 138.19 μg/m3
Nitrogen Dioxide: 2.47 μg/m3
Sulphur Dioxide: 1.56 μg/m3
Ozone: 67.44 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:34 PM
Sunset: 9:07 PM
Daylight: 15 hrs 4 mins
Moonrise: 12:13 AM
Moon Transit: 7:28 PM
Moonset: 2:06 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

7:20 AM - 9:50 AM
6:58 PM - 9:28 PM

Minor Periods

11:43 AM - 1:13 PM
1:36 AM - 3:06 AM

Action Rating: 3 out of 5

Saturday, May 23, 2026

Weather Forecast

Partly Cloudy
62.1°F
45.9°F
52.6°F
63%
0 in
0%
0%
13.6 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 5.36 μg/m3
PM10: 5.58 μg/m3
Carbon Monoxide: 154.54 μg/m3
Nitrogen Dioxide: 3.92 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 65.46 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:34 PM
Sunset: 9:08 PM
Daylight: 15 hrs 6 mins
Moonrise: 1:26 PM
Moon Transit: 8:15 PM
Moonset: 2:30 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

8:08 AM - 10:38 AM
7:45 PM - 10:15 PM

Minor Periods

12:56 AM - 2:26 PM
2:00 AM - 3:30 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Overcast
67.7°F
49.7°F
58.4°F
83%
0 in
0%
0%
7.2 mph
3


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

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:34 PM
Sunset: 9:09 PM
Daylight: 15 hrs 8 mins
Moonrise: 2:37 PM
Moon Transit: 8:58 PM
Moonset: 2:50 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

8:52 AM - 11:22 AM
8:28 PM - 10:58 PM

Minor Periods

2:07 PM - 3:37 PM
2:20 AM - 3:50 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Fog
78.4°F
57.6°F
67.3°F
79%
0 in
0%
0%
8.7 mph
4


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

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:34 PM
Sunset: 9:10 PM
Daylight: 15 hrs 9 mins
Moonrise: 3:44 PM
Moon Transit: 9:40 PM
Moonset: 3:08 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

9:35 AM - 12:05 AM
9:10 PM - 11:40 PM

Minor Periods

3:14 PM - 4:44 PM
2:38 AM - 4:08 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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