Lough Cullin water temperature
Lough Cullin, Pontoon · Lake
The current water temperature at Lough Cullin is 13.9 °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 1398 data points since July 22, 2026.
Lowest recorded value: 13.3 °C on September 12, 2026 · highest value: 22.7 °C on July 24, 2026.
In September, temperatures have ranged between 13.3 °C and 16.3 °C.
The current value is 0.6 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Lough Cullin right now?
The current water temperature is 13.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lough Cullin?
Currently 13.9 °C (updated continuously).
How warm is at Lough Cullin in September?
In September, the water temperature recently averaged 14.5 °C.
When is the water warmest at Lough Cullin?
Across the measurement record, July is on average the warmest month (18.1 °C).
