A day cruise from Athens to Aegina usually means visiting three Saronic Gulf islands: Aegina, Hydra, and Poros. Expect a big boat with several hundred other passengers, loudspeakers, and a packed itinerary. The sea crossing is pleasant in calm weather; the boat stops at each island for 1–2 hours so you can walk around, grab a coffee or swim. Aegina itself has a relaxed port town, decent beaches within walking distance, and the Temple of Aphaia if you’re willing to take a taxi. The day is long (usually 8am–7pm) and quite touristy – this is mass tourism, not a private yacht experience.
Best time is late spring (May–early June) or September–early October: fewer crowds, milder temperatures, and the sea is still warm enough to swim. July and August are hot, crowded, and the boats sell out. Expect to pay around €90–€140 per person including basic lunch and transport; drinks and optional excursions like the Aphaia temple run extra and push the real total to €110–€170.
Pick the version that stops longest in Aegina and Hydra and skips the overpriced onboard buffet if you can – eat fresh seafood or souvlaki in the ports instead. Skip the three-island cruise if you only want to see Aegina; the regular ferry from Piraeus is cheaper, faster, and gives you far more time on the island.
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