The current water temperature at San Juan River is 21.4 °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.
21.4 °C
Measured: October 1, 2026 · continuously updated
💧 Water 21.4° · ☀️ Air 5.3° · high today 14.8°
Temperature trend of recent weeks
Measurement series & statistics
This measurement series includes 179 data points since September 7, 2026.
Lowest recorded value: 14.2 °C on September 30, 2026 · highest value: 26.2 °C on October 1, 2026.
Can you swim at San Juan River right now? The current water temperature is 21.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at San Juan River? Currently 21.4 °C (updated continuously).