If you find yourself in Athens and the temperature is soaring, why not skip the cost of a sun bed at a hotel pool or at the Athenian Rivera (yes that is a thing!) and do what the locals do. Visit one of the many islands close to the Athenian coast.
Agistri is one such island. It is a tiny island that sits within the Saronic Islands. Its a 55 minute hydrofoil from Piraeus and its a great little getaway for a day trip or even a short stay for a night or two.