Sultan River below Diversion Dam near Sultan, Washington water temperature
Sultan River below Diversion Dam near Sultan, Washington · River
The current water temperature at Sultan River below Diversion Dam near Sultan is 12.7 °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.
Measurement series & statistics
This measurement series includes 496 data points since July 3, 2026.
Lowest recorded value: 11.0 °C on August 13, 2026 · highest value: 15.2 °C on July 14, 2026.
In September, temperatures have ranged between 12.7 °C and 13.7 °C.
The current value is 0.5 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Sultan River below Diversion Dam near Sultan right now?
The current water temperature is 12.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Sultan River below Diversion Dam near Sultan?
Currently 12.7 °C (updated continuously).
How warm is at Sultan River below Diversion Dam near Sultan in September?
In September, the water temperature recently averaged 13.2 °C.
When is the water warmest at Sultan River below Diversion Dam near Sultan?
Across the measurement record, September is on average the warmest month (13.2 °C).
