<!-- canonical: https://the-waterline.com/streamflow/columbia-river-at-the-dalles -->
<!-- Machine-readable Markdown for agents. Append .md to any page URL; index at https://the-waterline.com/llms.txt -->

# Columbia River at The Dalles streamflow

Daily mean discharge, Columbia basin, Oregon

_Data through Aug 12, 2026 · source last checked Aug 13, 2026 · page revised Aug 13, 2026_

> Now 115,000 cfs, 11% below the 5-yr median.

The Columbia River at The Dalles ran 125,000 cfs on August 9, at its 5-year median. Flow fell 10.7% over the past month but rose 5% in the past week.

## The numbers

| Period | Current | Prior | Change |
| --- | --- | --- | --- |
| Week over week | 115,000 cfs | 114,000 cfs | +0.9% |
| Month over month | 115,000 cfs | 126,000 cfs | -8.7% |
| Year over year | 115,000 cfs | 129,000 cfs | -10.9% |
| vs 5-yr median | 115,000 cfs | 129,000 cfs | -10.9% |

## About this data

- Source: US Geological Survey (USGS)
- Series: Daily mean streamflow (discharge)
- Geography: Columbia River at The Dalles
- Unit: cfs
- Calculation period: Daily mean
- Last observation: Aug 12, 2026
- Update frequency: Daily

---
Cite: Columbia River at The Dalles: 115,000 cfs daily mean discharge as of Aug 12, 2026 (USGS). The Waterline. https://the-waterline.com/streamflow/columbia-river-at-the-dalles
Canonical URL: https://the-waterline.com/streamflow/columbia-river-at-the-dalles