Lough Cullin water temperature
Lough Cullin, Pontoon · Lake
The current water temperature at Lough Cullin is 15.2 °C (as of September 1, 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 1434 data points since July 3, 2026.
Lowest recorded value: 13.2 °C on July 3, 2026 · highest value: 22.9 °C on July 16, 2026.
In September, temperatures have ranged between 15.2 °C and 15.5 °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 Cullin right now?
The current water temperature is 15.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lough Cullin?
Currently 15.2 °C (updated continuously).
How warm is at Lough Cullin in September?
In September, the water temperature recently averaged 15.4 °C.
When is the water warmest at Lough Cullin?
Across the measurement record, July is on average the warmest month (17.3 °C).
