Cantabrian Sea water temperature
Cantabrian Sea, Zumaia · Sea/Coast
The current water temperature at Cantabrian Sea is 21.7 °C (as of September 20, 2026, source: Open-Meteo marine model).
The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.
Water quality
EU classification: excellentMeasurement series & statistics
This measurement series includes 610 data points since July 22, 2026.
Lowest recorded value: 21.0 °C on September 14, 2026 · highest value: 26.0 °C on August 12, 2026.
In September, temperatures have ranged between 21.0 °C and 23.7 °C.
The current value is 0.7 °C below the September average of this series.
Nearby waters
More measuring points: Cantabrian Sea
Frequently asked questions
Can you swim at Cantabrian Sea right now?
The current water temperature is 21.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Cantabrian Sea?
Currently 21.7 °C (updated continuously).
How warm is at Cantabrian Sea in September?
In September, the water temperature recently averaged 22.4 °C.
When is the water warmest at Cantabrian Sea?
Across the measurement record, July is on average the warmest month (24.8 °C).
How is the water quality at Cantabrian Sea?
The official classification is: excellent.
