Hotel Belvedere & Tre Re is only a few steps away from the port of Capri, at Marina Grande. So it's easily and leisurely reachable by walking from the landing point of hydrofoils and ferries. It's visible from every side of the port and easy to distinguish because of its Pompeian red walls: when you'll get near Capri port you'll notice it immediately.
The Hotel is near to main public transport services of the island: the Funicular Railway to Capri (from where to get then a bus to Anacapri or Marina Piccola), buses to Capri or Anacapri, Taxies point. Nevertheless, it is on a quiet place since the main flow of daily tourists is turned on the opposite side of Marina Grande, regards the side where Hotel stands out.
Hotel practically overhangs the beach, that you can reach by Hotel's private steps. However, you can always get to the beach from Marina Grande, if you prefer take a drink before, or buy a newspaper or get a bread roll for a snack after swimming.