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# San Joaquin River near Vernalis streamflow

Daily mean discharge, San Joaquin basin, California

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

> Now 624 cfs, 46% below the 5-yr median.

Streamflow at Vernalis held at 806 cfs, down 7% from last week. Flow has risen 37% over the month and sits more than double the year-ago level. The reading is 6% below the 5-year median.

## The numbers

| Period | Current | Prior | Change |
| --- | --- | --- | --- |
| Week over week | 624 cfs | 750 cfs | -16.8% |
| Month over month | 624 cfs | 683 cfs | -8.6% |
| Year over year | 624 cfs | 424 cfs | +47.2% |
| vs 5-yr median | 624 cfs | 1,160 cfs | -46.2% |

## About this data

- Source: US Geological Survey (USGS)
- Series: Daily mean streamflow (discharge)
- Geography: San Joaquin River near Vernalis
- Unit: cfs
- Calculation period: Daily mean
- Last observation: Aug 12, 2026
- Update frequency: Daily

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Cite: San Joaquin River near Vernalis: 624 cfs daily mean discharge as of Aug 12, 2026 (USGS). The Waterline. https://the-waterline.com/streamflow/san-joaquin-river-near-vernalis
Canonical URL: https://the-waterline.com/streamflow/san-joaquin-river-near-vernalis