Anavyssos (Greek: Ανάβυσσος) is a town and a former municipality in East Attica, Greece located in the Athens Riviera.

[4] Anavyssos is the place where Elias Venezis, one of the most important Greek novelists of the 20th century located his 1939 novel 'Tranquility' (Γαλήνη).

Today Anavyssos is a major coastal resort of Attica famous for water-sports, the town sees its population tripled during the summer months.

In addition to the main part of the town, Anavyssos includes a number of satellite settlements such as Ag.

Together with Lagonisi it is the driest area in mainland Greece, the Athens Riviera and the Attica peninsula, receiving only 295 mm of annual precipitation.