You can take the bus to Kranidi, from the Intercity bus station (K.T.E.L.), which is located in Kifissos Athens (Tel. [+30] 210-513458).

From Kranidi there is a responce to Kosta with another bus, which is coordinated with the departure of the ferry boats. (tel. Intercity bus of Kranidi [+30] 27540-21218).

Kosta is a location across Spetses island and is 1/3 of a mile away from Spetses.

You can cross from Kosta to Spetses with one of the below ways

With the ferry boat which make 4 schedules daily all the year around (8.00 - 10.30 - 13.30 - 17.00).

With traditional boats (kaiki) which operates the summer months.

With sea taxi which operates 24 hours a day, from Kosta to Spetses or Spetses to Kosta.