Big Sioux River
South Dakota. Streamflow and water-temperature readings from USGS gauges. Running 575 cfs as of Aug 1, 2026, 6:30 PM UTC.
Latest Reading
575
cubic feet / second
12
USGS gauges
Flow measured Aug 1, 2026, 6:30 PM UTC at gauge 06485910. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.
USGS Gauges on Big Sioux River
| Gauge | Station | Water temp? |
|---|---|---|
| 06479215 | BIG SIOUX RIVER NEAR FLORENCE, SD | — |
| 06479438 | BIG SIOUX RIVER NEAR WATERTOWN, SD | — |
| 06479500 | BIG SIOUX RIVER AT WATERTOWN, SD | — |
| 06479520 | BIG SIOUX RIVER BELOW WATERTOWN, SD | — |
| 06479525 | BIG SIOUX RIVER NEAR CASTLEWOOD, SD | — |
| 06479770 | BIG SIOUX RIVER NEAR BRUCE, SD | — |
| 06480000 | BIG SIOUX RIVER NEAR BROOKINGS, SD | — |
| 06481000 | BIG SIOUX RIVER NEAR DELL RAPIDS, SD | — |
| 06482000 | BIG SIOUX RIVER AT SIOUX FALLS, SD | — |
| 06482020 | BIG SIOUX R AT NORTH CLIFF AVE AT SIOUX FALLS, SD | — |
| 06483950 | BIG SIOUX RIVER NEAR HAWARDEN, IA | — |
| 06485910 | BIG SIOUX RIVER NEAR JEFFERSON, SD | — |
Conditions: USGS NWIS (public domain).