Tunnel of Eupalinos

The Tunnel of Eupalinos is an archaeological site in Greece consisting of a water tunnel and a trench. It is recognized as a historic civil engineering landmark.
Planning a visit
The best time to visit is during the summer months, from June to September, when temperatures range from 22 °C to 25 °C and rainfall is minimal. The site is 283 km from Athens. Travelers can reach the area via Samos Airport, which is 2 km away, or via Adnan Menderes International Airport, located 69 km away.
Visitors can combine a trip to the tunnel with visits to Pythagoreion, located 1.2 km away, or the Heraion of Samos, which is 4.7 km away. Other nearby locations include the House of the Virgin Mary, the Library of Celsus, and Ephesus. An entrance fee is required to visit the site, and there is no wheelchair access.
Weather by month
The warmest month is August, averaging 25 °C. The wettest is December, with about 187 mm of rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average temperature, °C | 12 | 12 | 13 | 16 | 19 | 22 | 24 | 25 | 23 | 20 | 16 | 14 |
| Rainfall, mm | 153 | 108 | 78 | 48 | 31 | 2 | 0 | 0 | 9 | 43 | 130 | 187 |
| Rainy days | 14 | 9 | 9 | 4 | 4 | 3 | 1 | 1 | 2 | 3 | 8 | 12 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.