Marias River water temperature

Marias River, Loma, Montana · River

The current water temperature at Marias River is 12.9 °C (as of October 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.

12.9 °C

Measured: October 1, 2026 · continuously updated

💧 Water 12.9° · ☀️ Air 0.9° · high today 14.6°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 182 data points since September 7, 2026.

Lowest recorded value: 11.6 °C on September 27, 2026 · highest value: 19.9 °C on September 23, 2026.

Nearby waters

Marias River, Highway 223 bridge near Chester, Montana · 41.9 km away8.6 °C Sun River, Simms, Montana · 112.5 km away3.4 °C Smith River, Eagle Creek near Fort Logan, Montana · 132.6 km away11.7 °C Dearborn River, Craig, Montana · 140.8 km away11.3 °C Missouri River, Landusky, Montana · 145.7 km away6.0 °C

More measuring points: Marias River

Highway 223 bridge near Chester, Montana8.6 °C

Frequently asked questions

Can you swim at Marias River right now?
The current water temperature is 12.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Marias River?
Currently 12.9 °C (updated continuously).

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