Castlebar water temperature
Castlebar, Turlough · River
The current water temperature at Castlebar is 16.5 °C (as of September 1, 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 1435 data points since July 3, 2026.
Lowest recorded value: 15.8 °C on August 24, 2026 · highest value: 19.8 °C on July 16, 2026.
In September, temperatures have ranged between 16.5 °C and 16.7 °C.
The current value is 0.1 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Castlebar right now?
The current water temperature is 16.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Castlebar?
Currently 16.5 °C (updated continuously).
How warm is at Castlebar in September?
In September, the water temperature recently averaged 16.6 °C.
When is the water warmest at Castlebar?
Across the measurement record, July is on average the warmest month (18.0 °C).
