Derrymullan Stream water temperature
Derrymullan Stream, Deerpark Bridge · River
The current water temperature at Derrymullan Stream is 13.3 °C (as of September 20, 2026, source: official monitoring networks).
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 1400 data points since July 22, 2026.
Lowest recorded value: 10.6 °C on August 24, 2026 · highest value: 20.4 °C on August 13, 2026.
In September, temperatures have ranged between 12.0 °C and 17.5 °C.
The current value is 1.7 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Derrymullan Stream right now?
The current water temperature is 13.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Derrymullan Stream?
Currently 13.3 °C (updated continuously).
How warm is at Derrymullan Stream in September?
In September, the water temperature recently averaged 15.0 °C.
When is the water warmest at Derrymullan Stream?
Across the measurement record, July is on average the warmest month (16.4 °C).
