Au Sable River at Mio water level

Name: Au Sable River at Mio water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Au Sable River, Michigan, United States

Directions

High for mid-October

Water level

3.32ft Down 0.10 ft over the last 24 hours

Measured Oct 18, 2026, 03:00 PM EDT (22 min ago)

Flow: 1,130 cfs
Water temperature: 51 °F

History

7 days

Water level

What this means

The gauge at Au Sable River at Mio shows 3.32 ft, above normal for mid-October.

The level is falling, down 0.10 ft over the past 24 hours. Over the past 30 days it has moved between 3.31 ft and 3.65 ft.

That stands out in fall, when many rivers are usually near their lowest. The water temperature at the gauge is 51 °F.

Compared with 5 years of daily readings for this time of year. How to read levels

Key numbers

Highest on record: 8.32 ftApril 14, 2026

What the stage means on the water

Fast, high water is not the time for casual paddling. Strainers, debris and cold water make an unplanned swim dangerous.

Highest crests on record

Rank	Level	Date
1	8.32 ft	April 14, 2026
2	6.37 ft	April 1, 1998
3	6.33 ft	October 24, 2017
4	6.20 ft	March 21, 1995
5	6.16 ft	September 30, 1986
6	6.14 ft	March 28, 1976
7	6.14 ft	April 14, 2014
8	6.12 ft	April 15, 1991
9	6.00 ft	April 13, 1971
10	5.95 ft	March 30, 1989

Weather at the gauge

Rain in the last 3 days: 1.15 in. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 58° 39° – Wind 14 mph

19 Mon 61° 39° – Wind 11 mph

20 Tue 64° 45° – Wind 7 mph

21 Wed 66° 44° – Wind 7 mph

22 Thu 62° 48° – Wind 5 mph

23 Fri 64° 46° – Wind 7 mph

24 Sat 64° 49° – Wind 15 mph

Forecast: Open-Meteo

Sunrise 07:56 AM Sunset 06:48 PM Daylight 10 hr, 52 min First quarter 52%

Map

Other gauges on the Au Sable River

Gauge	Level	Compared with normal	24 hours	Distance
Au Sable River near Red OakRiver gauge, Au Sable River	3.42 ft	Below flood stage	−0.11 ft	8 mi
Au Sable River near Mc KinleyRiver gauge, Au Sable River	1,300 cfs	High	−80.0 cfs	15 mi
Au Sable River near CurtisvilleRiver gauge, Au Sable River	1,410 cfs	High	−110.0 cfs	18 mi
Au Sable River near Au SableRiver gauge, Au Sable River	1,350 cfs	Normal	−570.0 cfs	38 mi
Au Sable River near Us23 at OscodaRiver gauge, Au Sable River	13.84 ft	No reference yet	−0.10 ft	43 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Nb Au Sable River at Kelloggs Branch near LovellsRiver gauge, Nb Au Sable River	229 cfs	Very high	−12.0 cfs	15 mi
South Branch Au Sable River near LuzerneRiver gauge, South Branch Au Sable River	218 cfs	Normal	+5.0 cfs	16 mi
Lake St Helen at St HelenLake, Lake St Helen	6.36 ft	Normal	±0	25 mi
Higgins Lake near RoscommonLake, Higgins Lake	5.31 ft	Very high	−0.04 ft	32 mi
Otsego Lake near GaylordLake, Otsego Lake	3.65 ft	Very high	−0.09 ft	33 mi
Manistee River near GraylingRiver gauge, Manistee River	222 cfs	Very high	−15.0 cfs	35 mi
Houghton Lake near Houghton Lake HeightsLake, Houghton Lake	8.12 ft	Normal	+0.08 ft	37 mi

Questions and answers

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Au Sable River at Mio today?

On Oct 18, 2026, 03:00 PM EDT, the water level was 3.32 ft. Down 0.10 ft over the last 24 hours.

Is Au Sable River at Mio rising or falling?

Down 0.10 ft over the last 24 hours.

Is the level of Au Sable River at Mio normal?

High for mid-October. Compared with 5 years of daily readings for this time of year.

What is the highest water level ever recorded at Au Sable River at Mio?

The highest level on record is 8.32 ft on April 14, 2026.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:04136500 (Agency page)
Coordinates: 44.66001, -84.13112 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	3.32 ft	2026-10-18 19:00	Provisional
Flow	1,130 cfs	2026-10-18 19:00	Provisional
Water temperature	51 °F	2026-10-18 19:00	Provisional

Download

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How to cite

U.S. Geological Survey: Au Sable River at Mio (usgs:04136500). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/michigan/au-sable-river-at-mio

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer