Ferries from Poros to Ermioni can peak at up to 2 daily sailings, Sailing frequency typically peaks in the summer months, with approximately 9 departures offered each week. While schedules may be reduced from Poros to Ermioni in other seasons, ferry services are often still available.

Ferry travel from Poros to Ermioni on average typically takes 1h 15m. The earliest ferry usually leaves from Poros at 09:35, arriving to Ermioni at 10:30 The latest ferry departs at 22:10 and arrives at 23:35.