Tuolumne River A Grand Cyn of Tuolumne above Hetch Hetchy water temperature

Tuolumne River A Grand Cyn of Tuolumne above Hetch Hetchy · River

The current water temperature at Tuolumne River A Grand Cyn of Tuolumne above Hetch Hetchy is 19.4 °C (as of September 1, 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.

19.4 °C

Measured: September 1, 2026 · continuously updated

💧 Water 19.4° · ☀️ Air 18.5°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 305 data points since July 9, 2026.

Lowest recorded value: 16.5 °C on July 9, 2026 · highest value: 23.8 °C on August 10, 2026.

Nearby waters

Tuolumne River near Hetch Hetchy, California · 12.4 km away10.6 °C Eleanor C near Hetch Hetchy, California · 20.3 km away22.1 °C Merced River A Happy Isles Bridge near Yosemite, California · 22.4 km away14.6 °C Cherry C below Valley Dam near Hetch Hetchy, California · 23.3 km away11.6 °C Tuolumne River above Early Intake near Mather, California · 25.5 km away18.9 °C

Frequently asked questions

Can you swim at Tuolumne River A Grand Cyn of Tuolumne above Hetch Hetchy right now?
The current water temperature is 19.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Tuolumne River A Grand Cyn of Tuolumne above Hetch Hetchy?
Currently 19.4 °C (updated continuously).

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