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

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

cfs

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<p style="font-size:12px;margin:4px 0 0">Source: <a href="https://the-waterline.com/streamflow/san-joaquin-river-near-vernalis?utm_source=embed&utm_medium=credit">The Waterline</a> · updates automatically</p>
<p style="font-size:11px;color:#6b6b6b;margin:2px 0 0">About this data: US Geological Survey (USGS) · Daily mean streamflow (discharge) · San Joaquin River near Vernalis · cfs · Daily mean · through Aug 12, 2026</p>

Free to republish with attribution. The chart updates automatically as new data lands.

About this data

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

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%

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