Trinity River A Lewiston, California water temperature

Trinity River A Lewiston, California · River

The current water temperature at Trinity River A Lewiston is 10.9 °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.

10.9 °C

Measured: September 1, 2026 · continuously updated

💧 Water 10.9° · ☀️ Air 26.5°

Temperature trend of recent weeks

Trinity River A Lewiston, California — Photo: Adrian Reed Smith (VivaLaPandaz) · CC BY-SA 3.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 454 data points since July 3, 2026.

Lowest recorded value: 9.9 °C on July 16, 2026 · highest value: 12.4 °C on July 26, 2026.

Nearby waters

Trinity River A Douglas City, California · 15.8 km away13.1 °C Trinity River above Nf Trinity River near Helena, California · 26.8 km away15.3 °C Trinity River A Hoopa, California · 81.8 km away20.0 °C Eel River A Fort Seward, California · 90.1 km away25.4 °C Scott River above HWY 3 Branch A Fort Jones, California · 96.9 km away24.9 °C

Frequently asked questions

Can you swim at Trinity River A Lewiston right now?
The current water temperature is 10.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Trinity River A Lewiston?
Currently 10.9 °C (updated continuously).

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