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

Current Water Temperature

56.7°F

Measurement Time: Thursday, May 21, 2026, 9:30 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

32.9°F
Partly cloudy
Partly cloudy
27.8°F
38.1°F
80%
E 5.4 mph
11.3 mph
34.6°F
31.4°F
0 in
75%
9 mi
1027 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 60°F
L: 37°F
Cloudy
Sat
H: 64°F
L: 44°F
Overcast
Sun
H: 67°F
L: 46°F
Partly Cloudy
Mon
H: 78°F
L: 48°F
Patchy rain nearby
Tue
H: 83°F
L: 57°F

Air Quality

PM2.5: 4.15 μg/m3
PM10: 4.55 μg/m3
Carbon Monoxide: 119.85 μg/m3
Nitrogen Dioxide: 2.15 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 61 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

Frost Advisory issued May 21 at 3:20PM EDT until May 22 at 8:00AM EDT by NWS Gaylord MI

Effective: Thu May 21, 2026, 3:20 PM
Expires: Fri May 22, 2026, 3:30 AM

* WHAT...Temperatures of 32 to 34 degrees will result in frost formation. Localized pockets of temperatures below 30 degrees are possible. * WHERE...Portions of Eastern Upper and Northern Lower Michigan. * WHEN...From midnight tonight to 8 AM EDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Where winds become light overnight, a near-surface temperature inversion is possible. Temperature inversions are less likely across northwest Lower Michigan, where winds are expected to stay breezy through the night.

Take steps now to protect tender plants from the cold.


Frost Advisory issued May 21 at 10:27PM EDT until May 22 at 8:00AM EDT by NWS Gaylord MI

Effective: Thu May 21, 2026, 10:27 PM
Expires: Fri May 22, 2026, 8:00 AM

* WHAT...Temperatures of 32 to 34 degrees will result in frost formation. Localized pockets of temperatures below 30 degrees are possible. * WHERE...Portions of Eastern Upper and Northern Lower Michigan. * WHEN...Until 8 AM EDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Where winds become light overnight, a near-surface temperature inversion is possible. Temperature inversions are less likely across northwest Lower Michigan, where winds are expected to stay breezy through the night.

Take steps now to protect tender plants from the cold.
Friday, May 22, 2026

Weather Forecast

Sunny
60.1°F
37.2°F
49.1°F
59%
0 in
0%
0%
13.9 mph
6.3


Air Quality

AQI: 1 - Good
PM2.5: 4.62 μg/m3
PM10: 5.13 μg/m3
Carbon Monoxide: 123.81 μg/m3
Nitrogen Dioxide: 1.97 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 75.92 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

Cloudy
63.7°F
44.4°F
53.1°F
70%
0 in
0%
0%
14.5 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 3.74 μg/m3
PM10: 3.9 μg/m3
Carbon Monoxide: 139.33 μg/m3
Nitrogen Dioxide: 3.52 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 74.28 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
66.6°F
45.9°F
54.8°F
79%
0 in
0%
0%
7.2 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 2.75 μg/m3
PM10: 2.81 μg/m3
Carbon Monoxide: 143.41 μg/m3
Nitrogen Dioxide: 2.74 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 70.52 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

Partly Cloudy
78°F
47.9°F
62.4°F
69%
0 in
0%
0%
7.6 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 4.91 μg/m3
PM10: 5.05 μg/m3
Carbon Monoxide: 184.03 μg/m3
Nitrogen Dioxide: 4.2 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 60.15 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

Tuesday, May 26, 2026

Weather Forecast

Patchy rain nearby
83.3°F
56.5°F
66.6°F
77%
0.11 in
66%
0%
11.2 mph
0.7


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: 9:11 PM
Daylight: 15 hrs 11 mins
Moonrise: 4:51 PM
Moon Transit: 10:22 PM
Moonset: 3:25 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

10:16 AM - 12:46 AM
12:00 AM - 12:00 AM

Minor Periods

4:21 PM - 5:51 PM
2:55 AM - 4:25 AM

Action Rating: 2 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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