Mf San Joaquin River near Mammoth Lakes, California water temperature

Mf San Joaquin River near Mammoth Lakes, California · River

The current water temperature at Mf San Joaquin River near Mammoth Lakes is 18.0 °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.

18.0 °C

Measured: September 1, 2026 · continuously updated

💧 Water 18.0° · ☀️ Air 19.1°

Temperature trend of recent weeks

Mf San Joaquin River near Mammoth Lakes, California — Photo: Akos Kokai · CC BY 2.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 140 data points since July 9, 2026.

Lowest recorded value: 9.5 °C on August 30, 2026 · highest value: 21.6 °C on August 7, 2026.

Nearby waters

Deadman C A Big Springs near Crestview, California · 18.4 km away10.6 °C Hot C A Flume near Mammoth Lakes, California · 24.0 km away37.4 °C Merced River A Happy Isles Bridge near Yosemite, California · 43.0 km away14.6 °C Tuolumne River A Grand Cyn of Tuolumne above Hetch Hetchy · 59.5 km away19.4 °C Tuolumne River near Hetch Hetchy, California · 71.2 km away10.6 °C

Frequently asked questions

Can you swim at Mf San Joaquin River near Mammoth Lakes right now?
The current water temperature is 18.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Mf San Joaquin River near Mammoth Lakes?
Currently 18.0 °C (updated continuously).

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