Derrymullan Stream water temperature
Derrymullan Stream, Deerpark Bridge · River
The current water temperature at Derrymullan Stream is 13.0 °C (as of October 15, 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 1404 data points since August 17, 2026.
Lowest recorded value: 9.7 °C on October 8, 2026 · highest value: 18.1 °C on August 28, 2026.
In October, temperatures have ranged between 9.7 °C and 15.3 °C.
The current value is 0.5 °C above the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Derrymullan Stream right now?
The current water temperature is 13.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Derrymullan Stream?
Currently 13.0 °C (updated continuously).
How warm is at Derrymullan Stream in October?
In October, the water temperature recently averaged 12.5 °C.
When is the water warmest at Derrymullan Stream?
Across the measurement record, August is on average the warmest month (15.2 °C).
