San Joaquin River near Vernalis streamflow

Daily mean discharge, San Joaquin basin, California

Data through Jul 25, 2026 · source last checked Jul 26, 2026 · page revised Jul 26, 2026

Cite

San Joaquin River near Vernalis: 521 cfs daily mean discharge as of Jul 25, 2026 (USGS). The Waterline. https://the-waterline.com/streamflow/san-joaquin-river-near-vernalis

cfs

Embed chart

<a href="https://the-waterline.com/streamflow/san-joaquin-river-near-vernalis?utm_source=embed&utm_medium=chart">
  <img src="https://the-waterline.com/charts/streamflow/san-joaquin-river-near-vernalis/chart.png" alt="San Joaquin River near Vernalis streamflow — Jul 25, 2026" width="720" style="max-width:100%;height:auto;border:0"/>
</a>
<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 Jul 25, 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: Jul 25, 2026
Update frequency: Daily

Now 521 cfs, 34% below the 5-yr median.

San Joaquin River near Vernalis ran at 521 cfs, 34% below the 5-year median. Flow dropped 67.6% from a month ago. Year over year, flow was 25.2% higher.

The numbers
Period	Current	Prior	Change
Week over week	521 cfs	529 cfs	-1.5%
Month over month	521 cfs	1,610 cfs	-67.6%
Year over year	521 cfs	416 cfs	+25.2%
vs 5-yr median	521 cfs	785 cfs	-33.6%

Get the weekly water brief