The town is a suburb of Sousse, so all the tips for getting into Sousse also apply for Kantaoui. If you don't arrive as part of a package tour, from Sousse, you can take a taxi from the train station or the Medina agree to 5-6 dinar beforehand, the purple tuk-tuk 2-2.5 dinar per person or the tourist train 2.5 dinar per person.
If you come by boat, you have to report to both the port captain's office in the Marina to be issued a port flag and pay the port tax, and to the customs office. Both are located inside the port, next to the dock. Note that you must contact the port before arrival, since the number of available mooring spots is quite limited, especially during high season. The port tax varies depending on season, and, unfortunately, bribing is quite common.
You may also arrive via the Habib Bourgiba Airport at Monastir. From the airport, you can organise taxis to take you to Kantaoui or you may already have a transfer arranged for you if you've arrived as part of a package holiday. The journey time is approximately 30 minutes though it can vary widely depending on the level of traffic.
