Poros sits at the southern tip of the Saronic Gulf, separated from the Peloponnese coast by a narrow channel barely 200 metres wide. Its sheltered harbour, covered in pine forests and terracotta-roofed houses, has long drawn those looking for a quieter alternative to the crowded Cyclades. Charter an explorer yacht here and the contrast with a standard motor or sailing vessel becomes immediately clear: the additional range, the stabilisers that smooth the Aegean swell on passage, the storage for serious water toys, and a crew ethos built around reaching anchorages beyond the tourist orbit. From Poros, an explorer yacht can push south into the Argolic Gulf to Spetses, Hydra and Porto Heli in a single day, or cross to the Methana peninsula for thermal springs and deserted bays. North of the island, the Saronic archipelago offers Aegina, Angistri and the temple of Aphaia between passages. Explorer yachts typically carry an extended fuel capacity and a range of tenders and toys that makes them particularly suited to guests who want to dive the underwater caves of the Saronic, kayak around the Methana coast or simply push further than the average charter vessel dares. Weekly rates for the explorer yachts available in Greece begin around 40,000 euros for a smaller expedition-style vessel, rising depending on length and specification. The summer season runs from May through October, with June and September offering the best balance of settled weather and lighter harbours.