Foster Branch near Joppatowne, Maryland water temperature
Foster Branch near Joppatowne, Maryland · River
The current water temperature at Foster Branch near Joppatowne is 20.8 °C (as of September 20, 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 167 data points since July 22, 2026.
Lowest recorded value: 18.7 °C on September 8, 2026 · highest value: 25.4 °C on September 4, 2026.
In September, temperatures have ranged between 18.7 °C and 25.4 °C.
The current value is 1.1 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Foster Branch near Joppatowne right now?
The current water temperature is 20.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Foster Branch near Joppatowne?
Currently 20.8 °C (updated continuously).
How warm is at Foster Branch near Joppatowne in September?
In September, the water temperature recently averaged 21.9 °C.
When is the water warmest at Foster Branch near Joppatowne?
Across the measurement record, August is on average the warmest month (22.5 °C).
