Lough Derravaragh water temperature
Lough Derravaragh · Lake
The current water temperature at Lough Derravaragh is 11.6 °C (as of October 16, 2026, source: official monitoring networks).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
Measurement series & statistics
This measurement series includes 1429 data points since August 17, 2026.
Lowest recorded value: 11.6 °C on October 9, 2026 · highest value: 12.8 °C on August 17, 2026.
In October, temperatures have ranged between 11.6 °C and 12.1 °C.
The current value is 0.2 °C below the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Lough Derravaragh right now?
The current water temperature is 11.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lough Derravaragh?
Currently 11.6 °C (updated continuously).
How warm is at Lough Derravaragh in October?
In October, the water temperature recently averaged 11.8 °C.
When is the water warmest at Lough Derravaragh?
Across the measurement record, August is on average the warmest month (12.6 °C).
