# Willamette River at Portland streamflow Daily mean discharge, Willamette-Columbia basin, Oregon _Data through Aug 12, 2026 · source last checked Aug 13, 2026 · page revised Aug 13, 2026_ > Now 4,930 cfs, 21% below the 5-yr median. Willamette streamflow at Portland fell to 5,680 cfs, down 15% on the month and 10% below the 5-year median. Week-over-week the gauge rose 4.6%, though month-over-month declines persist. ## The numbers | Period | Current | Prior | Change | | --- | --- | --- | --- | | Week over week | 4,930 cfs | 5,310 cfs | -7.2% | | Month over month | 4,930 cfs | 7,310 cfs | -32.6% | | Year over year | 4,930 cfs | 5,890 cfs | -16.3% | | vs 5-yr median | 4,930 cfs | 6,220 cfs | -20.7% | ## About this data - Source: US Geological Survey (USGS) - Series: Daily mean streamflow (discharge) - Geography: Willamette River at Portland - Unit: cfs - Calculation period: Daily mean - Last observation: Aug 12, 2026 - Update frequency: Daily --- Cite: Willamette River at Portland: 4,930 cfs daily mean discharge as of Aug 12, 2026 (USGS). The Waterline. https://the-waterline.com/streamflow/willamette-river-at-portland Canonical URL: https://the-waterline.com/streamflow/willamette-river-at-portland