Northwest Branch Anacostia River water temperature
Northwest Branch Anacostia River, Brentwood, Maryland · River
The current water temperature at Northwest Branch Anacostia River is 22.7 °C (as of September 21, 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 154 data points since July 24, 2026.
Lowest recorded value: 21.5 °C on September 8, 2026 · highest value: 30.1 °C on September 1, 2026.
In September, temperatures have ranged between 21.5 °C and 30.1 °C.
The current value is 3.2 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Northwest Branch Anacostia River right now?
The current water temperature is 22.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Northwest Branch Anacostia River?
Currently 22.7 °C (updated continuously).
How warm is at Northwest Branch Anacostia River in September?
In September, the water temperature recently averaged 25.9 °C.
When is the water warmest at Northwest Branch Anacostia River?
Across the measurement record, August is on average the warmest month (26.3 °C).
