Walser's Eyes to the Sky Guide Service LLC
South Branch Rock River near Walser's Eyes to the Sky Guide Service LLC
About this river
South Branch Rock River is a 3.8 mile stream near Walser's Eyes to the Sky Guide Service LLC in Wisconsin. Streamflow is measured at the USGS gauge South Branch Rock River at Waupun, WI (site 05423500). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1949 to 2026
South Branch Rock River typically runs highest in April, at a median 59 cfs, and lowest in September, at 6.8 cfs. The highest flow on record for any single day is 2,140 cfs, in 2008.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 8.8 | 3.6 to 19 | |
| February | 9.5 | 4.3 to 22 | |
| March | 56 | 20 to 107 | |
| April | 59 | 34 to 98 | |
| May | 36 | 19 to 56 | |
| June | 21 | 9.8 to 46 | |
| July | 12 | 5.4 to 34 | |
| August | 9.3 | 3.0 to 22 | |
| September | 6.8 | 2.5 to 21 | |
| October | 7.9 | 3.4 to 18 | |
| November | 12 | 3.7 to 27 | |
| December | 9.4 | 3.6 to 26 |
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 60 years of record. Statistics published by the US Geological Survey for South Branch Rock River at Waupun, WI (site 05423500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show South Branch Rock 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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