Ionian Sea water temperature

Ionian Sea, Lefkada / Porto Katsiki · Sea/Coast

The current water temperature at Ionian Sea is 29.0 °C (as of September 1, 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.

29.0 °C

Measured: September 1, 2026 · continuously updated

💧 Water 29.0° · ☀️ Air 28.7°

Temperature trend of recent weeks

Water quality

EU classification: excellent

Measurement series & statistics

This measurement series includes 592 data points since July 3, 2026.

Lowest recorded value: 26.2 °C on July 28, 2026 · highest value: 29.6 °C on August 25, 2026.

Nearby waters

Mediterranean, Lefkada / Egremni · 3.3 km away29.0 °C Ionian Sea, Lefkada Vasiliki · 6.1 km away29.2 °C Ionian Sea, Ithaca · 24.5 km away29.2 °C Mediterranean, Kefalonia / Myrtos · 28.7 km away29.2 °C Mediterranean, Nidri · 29.6 km away29.7 °C

More measuring points: Ionian Sea

Scilla30.2 °C Taranto30.0 °C Porto Cesareo29.7 °C Preveza29.7 °C Santa Maria di Leuca29.7 °C Tropea29.7 °C

Frequently asked questions

Can you swim at Ionian Sea right now?
The current water temperature is 29.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Ionian Sea?
Currently 29.0 °C (updated continuously).

How is the water quality at Ionian Sea?
The official classification is: excellent.

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