South Branch Au Sable River in Michigan
Around here
Around South Branch Au Sable River
Camping8
Data Source: Recreation.gov · Public land: USGS PAD-US
About this river
South Branch Au Sable River is a 21.8 mile stream. Streamflow is measured at the USGS gauge South Branch AU Sable River near Luzerne, MI (site 04135700). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1967 to 2026
South Branch Au Sable River typically runs highest in April, at a median 365 cfs, and lowest in August, at 129 cfs. The highest flow on record for any single day is 1,110 cfs, in 1976.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 180 | 162 to 221 |
| February | 175 | 151 to 200 |
| March | 232 | 174 to 309 |
| April | 365 | 286 to 483 |
| May | 283 | 221 to 326 |
| June | 189 | 156 to 238 |
| July | 142 | 122 to 170 |
| August | 129 | 114 to 150 |
| September | 132 | 114 to 161 |
| October | 173 | 141 to 231 |
| November | 210 | 172 to 251 |
| December | 206 | 180 to 251 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 58 years of record. Statistics published by the US Geological Survey for South Branch AU Sable River near Luzerne, MI (site 04135700). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
4 mapped launches sit in the mapped area of South Branch Au Sable River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show South Branch Au Sable River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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