Boise River at Caldwell, Idaho water temperature

Boise River at Caldwell, Idaho · River

The current water temperature at Boise River at Caldwell is 19.9 °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.

19.9 °C

Measured: August 31, 2026 · continuously updated

💧 Water 19.9° · ☀️ Air 30.9°

Temperature trend of recent weeks

Boise River at Caldwell, Idaho — Photo: w:en:Tdferro (talk | contribs) · CC BY-SA 3.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 465 data points since July 3, 2026.

Lowest recorded value: 17.5 °C on August 31, 2026 · highest value: 25.0 °C on July 17, 2026.

Nearby waters

Boise River above Indian Creek at Caldwell, Idaho · 0.4 km away20.0 °C Boise River near Parma, Idaho · 24.7 km away20.7 °C Snake River at Weiser, Idaho · 67.0 km away21.8 °C Sf Boise River at Neal Bridge near Arrowrock Dam, Idaho · 80.1 km away13.2 °C Sf Boise River at Anderson Ranch Dam, Idaho · 105.4 km away10.8 °C

Frequently asked questions

Can you swim at Boise River at Caldwell right now?
The current water temperature is 19.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Boise River at Caldwell?
Currently 19.9 °C (updated continuously).

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