San Joaquin River near Vernalis, California water temperature

San Joaquin River near Vernalis, California · River

The current water temperature at San Joaquin River near Vernalis is 25.2 °C (as of August 31, 2026, source: USGS).

A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.

25.2 °C

Measured: August 31, 2026 · continuously updated

💧 Water 25.2° · ☀️ Air 24.5° · high today 25.7°

Temperature trend of recent weeks

San Joaquin River near Vernalis, California — Photo: Ken Lund from Reno, Nevada, USA · CC BY-SA 2.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 40 data points since July 9, 2026.

Lowest recorded value: 18.5 °C on July 9, 2026 · highest value: 28.7 °C on July 20, 2026.

Nearby waters

Stanislaus River A Ripon, California · 15.0 km away22.5 °C Tuolumne River A Modesto, California · 25.4 km away25.7 °C San Joaquin River near Crows Landing, California · 35.1 km away24.7 °C Stanislaus River A Oakdale, California · 38.0 km away19.7 °C Arroyo Valle near Livermore, California · 43.8 km away17.6 °C

Frequently asked questions

Can you swim at San Joaquin River near Vernalis right now?
The current water temperature is 25.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at San Joaquin River near Vernalis?
Currently 25.2 °C (updated continuously).

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