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

Current Water Temperature

36.3°F

Measurement Time: Monday, February 16, 2026, 2:30 AM EST

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

30°F
Sunny
Sunny
23.6°F
29.9°F
81%
SSW 6.3 mph
13.2 mph
28.6°F
26.4°F
0 in
0%
6 mi
1012 mbar
0.1

Five Day Weather Forecast

Partly Cloudy
Mon
H: 46°F
L: 29°F
Mist
Tue
H: 33°F
L: 27°F
Ice pellets
Wed
H: 34°F
L: 28°F
Fog
Thu
H: 36°F
L: 30°F
Moderate snow
Fri
H: 34°F
L: 26°F

Air Quality

AQI: 1 - Good
PM2.5: 10.95 μg/m3
PM10: 11.25 μg/m3
Carbon Monoxide: 278.85 μg/m3
Nitrogen Dioxide: 6.35 μg/m3
Sulphur Dioxide: 4.35 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 7:36 AM
Sun Transit: 12:51 AM
Sunset: 6:08 PM
Daylight: 10 hrs 32 mins
Moonrise: 7:24 AM
Moon Transit: 12:17 AM
Moonset: 5:21 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:09 AM - 2:39 AM
11:47 AM - 2:17 PM

Minor Periods

4:51 PM - 6:21 PM
6:54 AM - 8:24 AM

Action Rating: 4 out of 5

Special Weather Statement issued February 15 at 8:12PM EST by NWS Gaylord MI

Effective: Sun February 15, 2026, 8:12 PM
Expires: Mon February 16, 2026, 4:00 AM

Dense fog has been gradually making inroads from Lake Michigan into coastal areas of northern Michigan this evening, along with additional areas of dense fog across the eastern UP and northeast lower. Visibilities of a quarter mile or less have been observed in localized areas. Locally dense fog will continue into this evening at times across portions of eastern upper and northern lower Michigan. Untreated roadways may be slick in spots due to freezing fog. If you encounter dense fog while traveling, use low beam headlights and increase following distance.


Monday, February 16, 2026

Weather Forecast

Partly Cloudy
45.5°F
29.3°F
34.8°F
88%
0 in
0%
0%
8.7 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 13.75 μg/m3
PM10: 14.17 μg/m3
Carbon Monoxide: 282.93 μg/m3
Nitrogen Dioxide: 9.57 μg/m3
Sulphur Dioxide: 2.3 μg/m3
Ozone: 60.12 μg/m3

Astronomical

Sunrise: 7:36 AM
Sun Transit: 12:51 AM
Sunset: 6:08 PM
Daylight: 10 hrs 32 mins
Moonrise: 7:24 AM
Moon Transit: 12:17 AM
Moonset: 5:21 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:09 AM - 2:39 AM
11:47 AM - 2:17 PM

Minor Periods

4:51 PM - 6:21 PM
6:54 AM - 8:24 AM

Action Rating: 4 out of 5

Tuesday, February 17, 2026

Weather Forecast

Mist
32.5°F
27.1°F
29.6°F
93%
0 in
0%
3%
8.5 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 5.23 μg/m3
PM10: 5.85 μg/m3
Carbon Monoxide: 215.53 μg/m3
Nitrogen Dioxide: 4.41 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 77.84 μg/m3

Astronomical

Sunrise: 7:35 AM
Sun Transit: 12:51 AM
Sunset: 6:10 PM
Daylight: 10 hrs 35 mins
Moonrise: 7:46 AM
Moon Transit: 1:04 PM
Moonset: 6:34 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:56 AM - 3:26 AM
12:34 AM - 3:04 PM

Minor Periods

6:04 PM - 7:34 PM
7:16 AM - 8:46 AM

Action Rating: 5 out of 5

Wednesday, February 18, 2026

Weather Forecast

Ice pellets
34.3°F
27.5°F
31.2°F
95%
1.11 in
83%
28%
15.9 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.22 μg/m3
PM10: 4.53 μg/m3
Carbon Monoxide: 234.85 μg/m3
Nitrogen Dioxide: 7.93 μg/m3
Sulphur Dioxide: 2.32 μg/m3
Ozone: 70.16 μg/m3

Astronomical

Sunrise: 7:33 AM
Sun Transit: 12:51 AM
Sunset: 6:11 PM
Daylight: 10 hrs 38 mins
Moonrise: 8:06 AM
Moon Transit: 1:50 PM
Moonset: 7:47 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

1:43 AM - 4:13 AM
1:20 PM - 3:50 PM

Minor Periods

7:17 PM - 8:47 PM
7:36 AM - 9:06 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Fog
35.8°F
29.8°F
32.6°F
99%
0 in
0%
0%
10.1 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.71 μg/m3
PM10: 1.73 μg/m3
Carbon Monoxide: 183.23 μg/m3
Nitrogen Dioxide: 3.77 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 75.24 μg/m3

Astronomical

Sunrise: 7:31 AM
Sun Transit: 12:51 AM
Sunset: 6:12 PM
Daylight: 10 hrs 41 mins
Moonrise: 8:25 AM
Moon Transit: 4:07 PM
Moonset: 9:01 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

2:28 AM - 4:58 AM
3:37 PM - 6:07 PM

Minor Periods

8:31 PM - 10:01 PM
7:55 AM - 9:25 AM

Action Rating: 4 out of 5

Friday, February 20, 2026

Weather Forecast

Moderate snow
33.5°F
26°F
31.7°F
96%
0.37 in
69%
59%
14.1 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 3.51 μg/m3
PM10: 3.54 μg/m3
Carbon Monoxide: 236.31 μg/m3
Nitrogen Dioxide: 6.31 μg/m3
Sulphur Dioxide: 2.4 μg/m3
Ozone: 62.62 μg/m3

Astronomical

Sunrise: 7:30 AM
Sun Transit: 12:51 AM
Sunset: 6:14 PM
Daylight: 10 hrs 44 mins
Moonrise: 8:44 AM
Moon Transit: 3:22 PM
Moonset: 10:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:52 PM - 5:22 PM

Minor Periods

9:46 PM - 11:16 PM
8:14 AM - 9:44 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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