Ionian Sea water temperature
Ionian Sea, Marzamemi · Sea/Coast
The current water temperature at Ionian Sea is 28.3 °C (as of September 12, 2026, source: ISPRA).
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 1401 data points since July 14, 2026.
Lowest recorded value: 25.5 °C on July 28, 2026 · highest value: 30.8 °C on August 12, 2026.
In September, temperatures have ranged between 28.3 °C and 30.4 °C.
The current value is 1.1 °C below the September average of this series.
Nearby waters
More measuring points: Ionian Sea
Frequently asked questions
Can you swim at Ionian Sea right now?
The current water temperature is 28.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ionian Sea?
Currently 28.3 °C (updated continuously).
How warm is at Ionian Sea in September?
In September, the water temperature recently averaged 29.4 °C.
When is the water warmest at Ionian Sea?
Across the measurement record, September is on average the warmest month (29.4 °C).
How is the water quality at Ionian Sea?
The official classification is: excellent.
