The only way to get to the beach is by boat. There are daily cruises starting from Laganas and Zakynthos town which you can join, or even better, you can pick the one which starts from Agios Nikolaos Volimon port and get a chance to combine a visit to Blue Caves on your way to Navagio beach.
The best way to admire the amazing beach is from the top of the cliff. The view from there is simply wonderful. Colors of the sea from up there are spectacular, and the contrast of the white cliffs makes the landscape incredible. To enjoy that panoramic view you need to rent a car or a motorbike, as it’s many km away from most resorts of the island, but you can easily go there on your way back from Agios Nikolaos Volimon port to the northern Zante.