Sea temperature in Piraeus in August
The sea around Piraeus averages 27°C in August, usually between 26°C and 29°C. That is warm enough for most people to swim comfortably.
Average27°CVery warm
Usual range26°C–29°C80% of readings
vs July+0.5°warmer
vs September−1.3°cooler next month
Through the year
Monthly averages 2023–2025. Water at 22°C or warmer: June–October.
August in recent years
| 2023 | 27°C |
|---|---|
| 2024 | 28°C |
| 2025 | 26°C |
Nearby in August
Beaches in Piraeus
104 of 104 beaches have an Excellent EU water-quality grade. See which ones are calm today.