Lough Derravaragh water temperature
Lough Derravaragh · Lake
The current water temperature at Lough Derravaragh is 12.2 °C (as of September 20, 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 1400 data points since July 22, 2026.
Lowest recorded value: 12.2 °C on September 19, 2026 · highest value: 13.2 °C on July 22, 2026.
In September, temperatures have ranged between 12.2 °C and 12.5 °C.
The current value is 0.2 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Lough Derravaragh right now?
The current water temperature is 12.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lough Derravaragh?
Currently 12.2 °C (updated continuously).
How warm is at Lough Derravaragh in September?
In September, the water temperature recently averaged 12.4 °C.
When is the water warmest at Lough Derravaragh?
Across the measurement record, July is on average the warmest month (13.1 °C).
