USGS National Water Dashboard
The USGS National Water Dashboard has streamflow data from all of their gauges on moving water across the United States. Each USGS gauge has flow rate and gauge height data, and some have water temperature, salinity, and/or turbidity data as well. Water temperature is helpful for knowing whether wet or dry suits or components are necessary. Salinity and turbidity are mainly useful to anglers.
There are also dashboards for each state.
Visit the USGS National Water Dashboard today. See below for the state dashboards.