About this river
Au Sable River is a 21.5 mile river near Campbell's Canoe & Kayak Livery in Michigan. Streamflow is measured at the USGS gauge AU Sable River near Red Oak, MI (site 04136000). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1909 to 2026
Au Sable River typically runs highest in April, at a median 1,190 cfs, and lowest in August, at 616 cfs. The highest flow on record for any single day is 3,220 cfs, in 1998.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 728 | 652 to 844 | |
| February | 729 | 640 to 800 | |
| March | 861 | 706 to 1,040 | |
| April | 1,190 | 949 to 1,520 | |
| May | 992 | 848 to 1,180 | |
| June | 780 | 687 to 959 | |
| July | 677 | 587 to 749 | |
| August | 616 | 567 to 698 | |
| September | 634 | 547 to 730 | |
| October | 686 | 618 to 844 | |
| November | 778 | 661 to 905 | |
| December | 768 | 680 to 882 |
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 36 years of record. Statistics published by the US Geological Survey for AU Sable River near Red Oak, MI (site 04136000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show 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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