Tuolumne River water temperature

Tuolumne River, Hetch Hetchy, California · River

The current water temperature at Tuolumne River is 10.4 °C (as of September 21, 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.

10.4 °C

Measured: September 21, 2026 · continuously updated

💧 Water 10.4° · ☀️ Air 9.4° · high today 19.9°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 84 data points since August 29, 2026.

Lowest recorded value: 10.1 °C on August 30, 2026 · highest value: 11.1 °C on September 9, 2026.

In September, temperatures have ranged between 10.1 °C and 11.1 °C.

Nearby waters

Eleanor C, Hetch Hetchy, California · 8.2 km away18.3 °C Cherry C, Valley Dam near Hetch Hetchy, California · 11.0 km away8.4 °C Tuolumne River A Grand Cyn of Tuolumne, Hetch Hetchy · 12.4 km away15.8 °C Tuolumne River, Early Intake near Mather, California · 14.6 km away15.7 °C Cherry C, Early Intake, California · 15.2 km away15.9 °C

More measuring points: Tuolumne River

Early Intake near Mather, California16.7 °C Early Intake near Mather, California15.7 °C Lagrange Dam near Lagrange, California12.1 °C

Frequently asked questions

Can you swim at Tuolumne River right now?
The current water temperature is 10.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Tuolumne River?
Currently 10.4 °C (updated continuously).

How warm is at Tuolumne River in September?
In September, the water temperature recently averaged 10.4 °C.

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