Getting Around in Greece
Edit ThisFerries
To get to the islands you will mostly have to take a ferry. There are extensive connections from Athens and in-between islands for "hopping." Ferries are about the one thing in Greece that leave on time so BE PROMPT. In August, ferries fill up due to the National Holiday (Aug 15) so plan ahead. New "fast ferries" are cutting distance times in half but prices are slightly more expensive.
There are two ports in Athens: the main port Piraeus and outlying Rafina. These serve all islands, but northern islands such as Lesvos, it is better to leave from Rafina.
Visit Greek Travel Pages (http://www.gtp.gr) to find all schedules for ferries in Greece and to/from Greece.