Boat Tours from Sifnos: Poliegos, Kimolos & Beyond

Sifnos’s own coastline is lovely, but the show-stoppers are the neighbouring islands you can only properly see by sea: Poliegos, uninhabited and ringed with impossibly clear bays, and Kimolos, its quiet beaches and good tavernas a short hop away. Add the caves and white cliffs of northern Milos, and a single day on the water gives you scenery that would take days to reach otherwise.

Most trips leave from Platis Gialos marina on the south coast (some from Vathi), and follow one of a few well-worn routes.

The classic. Poliegos — “many goats” — is the largest uninhabited island in the Aegean and a protected nature reserve, its only residents wild goats. Boats stop at Kalogeros Bay, the pool-clear Blue Bay, and the open-roofed Fanara sea cave, and pass the island’s lighthouse (built 1898, perched high above the sea). The southern bays stay calm even when the north wind is up, which makes Poliegos the reliable choice on breezy days.

Often combined with Poliegos. Expect a swim at the secluded Soufi (“Valium”) bay, a stop at the little port of Psathi for coffee or a seaside lunch, and the celebrated beaches of Prassa and Goupa/Kara on the east coast.

The longer, wilder route. Highlights include the lunar white rocks of Sarakiniko, the natural rock “pool” of Papafragas, a snorkel over the Navagio shipwreck (visible just below the surface), and the pretty port of Pollonia.

For a shorter outing, boats loop Sifnos’s own south coast and the islet of Kitriani with its lonely chapel — good for families or anyone wanting a half-day rather than a full one.

The easiest and best value: a scheduled full-day cruise with a skipper, several swim stops, snorkelling gear and usually light food or drinks. You share the boat with a small group. Typically 6–8 hours.

Your own boat, skipper and route — pricier but flexible, ideal for couples, families or groups who want to set the pace, linger at favourite spots, or add a sunset. Fast RIBs cover more ground (Milos in a day); traditional wooden boats are slower and more relaxed. See our sailing & private charters guide for the premium end.

Rent a small boat (engine up to 30hp) with no licence after a short (~20-minute) briefing. You explore Sifnos’s own coast and nearby coves at your own pace, though you can’t range far. For bareboat RIB rental you’ll need a valid speedboat licence and experience.

Most organised trips include the skipper, fuel, snorkelling gear and often floats, water and light snacks; some add a proper lunch or a lunch stop on Kimolos. Bring: swimwear worn under your clothes, a towel, high-SPF sunscreen, a hat, a light layer for the ride home, cash for any taverna stop, and a dry bag for your phone. Confirm what each operator provides when you book. For underwater exploration, see our diving & snorkelling guide.

Boat season runs roughly May to October. The variable is the meltemi, the strong northerly wind of July and August: it can reroute or cancel trips, and it’s why skippers favour the sheltered southern bays of Poliegos on windy days. Reputable operators reschedule or refund for genuine weather cancellations — check the policy. Calmer, cooler June and September are arguably the sweet spot. See our Best Time to Visit Sifnos guide.

Book ahead in high summer — the best boats and skippers sell out days in advance. You can arrange trips at the Platis Gialos marina, through your accommodation, or on booking platforms; look for operators with strong recent reviews and a clear weather-cancellation policy. If you’d rather island-hop by ferry, see day trips from Sifnos and the Ferry Guide.