Kootenai River at Porthill, Idaho water temperature

Kootenai River at Porthill, Idaho · River

The current water temperature at Kootenai River at Porthill is 15.7 °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.

15.7 °C

Measured: August 31, 2026 · continuously updated

💧 Water 15.7° · ☀️ Air 22.1° · high today 26.3°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 484 data points since July 3, 2026.

Lowest recorded value: 13.9 °C on July 3, 2026 · highest value: 18.2 °C on July 22, 2026.

Nearby waters

Kootenai River at Bonners Ferry, Idaho · 36.1 km away14.4 °C Kootenai River at Leonia, Idaho · 53.9 km away13.8 °C Boundary Reservoir at Forebay near Metaline Falls · 61.5 km away22.4 °C Pend Oreille River at International Boundary · 61.7 km away22.1 °C Hall Creek above Inchelium, Washington · 148.0 km away17.3 °C

Frequently asked questions

Can you swim at Kootenai River at Porthill right now?
The current water temperature is 15.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Kootenai River at Porthill?
Currently 15.7 °C (updated continuously).

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