Sifnos boat trips run six to nine hours from Kamares, Platys Gialos and Vathi to the uninhabited island of Polyaigos, the coves of Kimolos, the north coast of Milos and the Antiparos and Despotiko crossing, with two or three swim stops and lunch on board. Plan the rest of the island with Greece Tours.
This page covers the whole day: where the boats leave from, what each route reaches, the Polyaigos and Kimolos cruises, the north Milos run, the price bands, the vessels, what is on board, how the meltemi decides the sailing, and how to book Sifnos boat trips in high summer.
What do Sifnos boat trips cover in a single day?
Sifnos boat trips run five main programmes: full-day cruises to Polyaigos and Kimolos, the north Milos coast, the Antiparos and Despotiko crossing, the Koufonisia run, and round-the-island coastal trips lasting six to nine hours from Kamares, Platys Gialos and Vathi.
The Polyaigos and Kimolos programme is the anchor of the timetable, leaving Kamares at 09:30 and returning by 18:00 after three swim stops. The north Milos route adds Sarakiniko, Papafragas and the Glaronisia columns across a 90-minute crossing. The Antiparos and Despotiko run, 22 nautical miles northeast, pairs the Blue Cave with the sanctuary of Apollo excavated on Despotiko islet. The Sifnos boat trips operators state this at booking. Sifnos boat trips carry the gear for it.
The Koufonisia run is the longest at nine hours, crossing 34 nautical miles east to Pori and Fanos on Pano Koufonisi, and it sails only on flat mornings in June and September. Round-the-island coastal trips stay inside Sifniot water, tracing Vathi, Fykiada, Chersonisos and the cliffs under Cheronissos in six hours with four anchorages. Sifnos boat trips fill first on that count in August. It decides which of the Sifnos boat trips to take.
Departure points shift with the programme. Boats bound for Milos, Kimolos and Polyaigos leave Vathi and Platys Gialos on the south coast; Paros-facing routes and the coastal circuit leave Kamares, the harbour that also handles the Sifnos to Paros ferry. Each operator posts fixed weekly days rather than daily sailings, so the Polyaigos cruise runs Monday, Wednesday, Friday and Sunday for most fleets. This is what Sifnos boat trips deliver on the water.
Where do the boats leave from on the island?
Four harbours handle departures: Kamares on the west coast, Platys Gialos and Vathi in the south, and Faros on the east. Driving time from Apollonia runs 10 to 25 minutes, and boarding starts 20 minutes before the stated departure.
Kamares sits 5.5 km west of Apollonia, a 10-minute drive on the paved main road, and carries the ferry quay, the fuel dock and the largest caique fleet. Platys Gialos lies 9.5 km south, 18 minutes by car, with the pier at the eastern end of the 700-metre beach. Vathi is 11 km southwest, 25 minutes, with a shallow sandy bay and a single stone jetty beside Taverna Manolis. Every one of the Sifnos boat trips is timed against it. The Sifnos boat trips season turns on this.
Parking dictates arrival time more than the crossing does. Kamares has a free gravel lot behind the beach road holding about 80 cars, full by 09:00 in August. Platys Gialos parks along the ring road above the beach, a 300-metre walk to the pier. Vathi has room for 40 vehicles at the bus turnaround. KTEL buses reach all three from Apollonia every 30 to 60 minutes between 07:30 and 22:00. The Sifnos boat trips route is set by it. The Sifnos boat trips price reflects it.
Most sifnos boat trips confirm the meeting point by SMS the previous evening, because a northerly forecast moves the Polyaigos cruise from Kamares to Vathi. Faros, 8 km southeast of Apollonia, serves small rigid inflatables and private transfers to Chrysopigi rather than full-day cruises. Passengers on Sifnos staying in Kastro reach Faros in 12 minutes. Sifnos boat trips leave the quay with this settled.
What is the Polyaigos cruise like?
Polyaigos lies 8 nautical miles east of Sifnos and is the largest uninhabited island in the Aegean at 18 square kilometres. The crossing takes 45 to 70 minutes, and the day includes two or three swim stops in milky turquoise water.
The island holds no houses, no road and no water source, only wild goats and a lighthouse on the eastern cape. Its limestone cliffs rise 100 to 350 metres above the sea and turn chalk white in the midday light. Kato Mersini, the sheltered bay on the northwest side, is the standard first anchorage, where fresh groundwater mixes with salt and produces the pale opaque blue that separates Polyaigos from every other Cycladic swim stop. Sifnos boat trips are sold on that. The Sifnos boat trips operators state this at booking.
The second stop is Ammoudia or Panagia, both shingle coves with depths of three to six metres over pale sand. Skippers hold the boats 30 to 60 metres offshore and drop a stern ladder; swimmers reach the beach in two minutes. Snorkelling along the eastern wall of Kato Mersini shows sea bream, octopus and the flat gorgonian shelves at eight metres. Passengers on Sifnos boat trips read it from the deck.
Timing follows the wind. Boats leave Vathi or Platys Gialos at 09:30, spend 90 minutes at the first bay, eat lunch at anchor around 13:30, then run 40 minutes north to Kimolos before turning home at 16:30. Sifnos boat trips to Polyaigos carry 8 to 40 passengers depending on hull, and the caiques stay east of the island when the meltemi rises after noon. The Sifnos boat trips timetable is built on it.
What does the Kimolos trip cover?
The Kimolos programme crosses 9 nautical miles east to Prassa and Kalamitsi, passes the Skiadi mushroom rock and the north-coast sea caves, and stops for lunch at Psathi harbour before returning, frequently combined with Polyaigos on the full-day timetable.
Prassa, on the northeast tip, has white sand over a shallow bed and old bentonite workings behind the beach, which give the water a bright green cast in the first 20 metres. Kalamitsi, two coves west, is smaller and shaded by tamarisks, with a single seasonal canteen. Boats anchor 40 metres out at both and allow 60 to 75 minutes for swimming. The Sifnos boat trips fleet is fitted for it. Every one of the Sifnos boat trips is timed against it.
Skiadi stands 200 metres inland on the western plateau at 250 metres altitude, a volcanic tuff formation whose softer base eroded under a harder cap, leaving a stone disc four metres across. Skippers point it out from the water; reaching it on foot needs a 40-minute walk from Ellinika and forms part of land-based excursions rather than the cruise. That is the Sifnos boat trips difference.
Psathi is the port of Kimolos, a 15-minute walk below Chorio, with four tavernas along the quay serving ladenia, the local flatbread with tomato and onion, and grilled fish at 12 to 22 euros per plate. Full-day sifnos boat trips give 75 to 90 minutes ashore. The north-coast caves at Gerakia and Vromolimni take small tenders inside when the swell stays under half a metre. Crews handle it before Sifnos boat trips cast off.
What do Sifnos boat trips to north Milos include?
The north Milos route covers Sarakiniko’s white volcanic rock, the flooded tunnels of Papafragas, the Arkoudes sea stacks and the basalt columns of Glaronisia, after a 90-minute crossing of 14 nautical miles that the north wind cancels first.
Sarakiniko is bare white pumice and ash weathered into smooth ridges, with a narrow inlet where boats hold position while swimmers jump from ledges two to four metres above the water. There is no vegetation and no shade on the rock, and surface temperatures at noon in August exceed 45 degrees. Skippers allow 45 minutes and keep the ladder down throughout. This is what Sifnos boat trips deliver on the water. Sifnos boat trips are sold on that.
Papafragas sits 1.5 km east, three parallel corridors cut into pale tuff, each 10 to 15 metres wide with vertical walls. Entry by boat depends on swell; tenders and rigid inflatables pass through when the northeast sea stays flat. Arkoudes, the bear-shaped grey stacks off Cape Vani, marks the northwest corner, and Glaronisia’s hexagonal basalt columns rise 15 metres straight from the water 800 metres offshore. Sifnos boat trips carry the gear for it.
Wind decides everything on this run. The exposed north Milos coast faces the meltemi head-on, so operators cancel the programme at force 5 and redirect to Polyaigos, which lies in the lee. Sifnos boat trips to Milos sail most reliably in late May, early June and the second half of September, when northerlies drop below 15 knots for stretches of four or five consecutive days. It decides which of the Sifnos boat trips to take.
What do Sifnos boat trips cost per person?
A shared full-day cruise with lunch and drinks costs 55 to 95 euros per person. Half-day coastal trips run 40 to 70 euros. Private speedboats and caiques for six to twelve passengers cost 600 to 1,400 euros for the whole vessel.
The 55 to 70 euro band covers wooden caiques carrying 25 to 40 passengers on the Polyaigos and Kimolos circuit, with a cooked lunch of pasta, salad and local chickpea dishes served at anchor, plus water, soft drinks, wine and beer. The 80 to 95 euro band buys rigid inflatables and speedboats holding 8 to 14, which reach Milos in 50 minutes rather than 90 and add a third swim stop. Sifnos boat trips leave the quay with this settled. The Sifnos boat trips fleet is fitted for it.
Children aged 3 to 12 pay 50 to 60 percent of the adult fare on caiques; infants travel free. Port fees of 2 to 4 euros are included in the advertised price on Sifnos, unlike on Milos-based departures. Lunch ashore at Psathi is excluded on the combined programme and adds 15 to 25 euros per head. The Sifnos boat trips season turns on this.
Private hire prices scale with hull and fuel. A 12-metre caique for eight passengers runs 600 to 850 euros for seven hours; a 9-metre rigid inflatable with a 300-horsepower outboard costs 900 to 1,400 euros and burns 120 to 180 litres on the Polyaigos loop. A crewed sailing yacht through a Sifnos yacht charter starts near 1,200 euros daily. Sifnos boat trips take cards at the office and cash at the pier. The Sifnos boat trips price reflects it.
What kinds of boats run these routes?
Three hull types work the routes: traditional wooden caiques of 12 to 18 metres carrying 25 to 40 passengers, rigid inflatables and speedboats of 6 to 10 metres taking 8 to 14, and sailing yachts of 12 to 16 metres on slower programmes.
The caiques are Aegean-built trehandiri and perama hulls with single diesels of 120 to 250 horsepower, cruising at 7 to 9 knots. They roll gently in a beam sea, carry a deep keel that steadies the ride, and hold a shaded aft deck, a galley and a marine toilet. The trade-off is time: Kamares to Polyaigos takes 70 minutes against 35 for a fast hull. The Sifnos boat trips timetable is built on it. This is what Sifnos boat trips deliver on the water.
Rigid inflatables with twin 150-horsepower outboards cruise at 25 to 30 knots and reach Papafragas, Kleftiko or Despotiko inside an hour. They ride hard above force 4, offer a bimini rather than a full canopy, and carry no galley, so lunch comes from a taverna stop. Passenger caps of 8 to 12 keep swim stops uncrowded and let the skipper enter caves closed to larger vessels. The Sifnos boat trips operators state this at booking.
Sailing yachts run 8 to 10 hour days with engine assistance, covering 20 to 25 nautical miles and holding 8 to 10 guests. Motion is steadier under sail, and the boat anchors longer at each bay. Operators licensed for sifnos boat trips carry Greek passenger certificates, life jackets for every seat, VHF and a first-aid kit inspected by the Port Authority each spring. Sifnos boat trips fill first on that count in August.
What is on board, and what does a passenger bring?
Boats carry a shaded deck, a swim ladder, a marine toilet, freshwater rinse, snorkel masks and life jackets, plus lunch cooked on board or served at Psathi. Passengers bring a towel, sun cream, a hat, cash and a windproof layer.
Caique lunches come off a two-burner galley: pasta with tomato and myzithra, green salad, revithada chickpeas baked in the Sifniot clay pot, bread, olives and seasonal fruit. Drinks flow from a cooler holding water, Mythos beer, local white wine and soft drinks. Rigid inflatables carry chilled water and fruit only, then stop at Psathi, Pollonia or Vathi for a taverna meal costing 15 to 25 euros. Crews handle it before Sifnos boat trips cast off. Sifnos boat trips leave the quay with this settled.
Snorkel masks and fins in sizes 36 to 46 sit in a deck box at no charge; stand-up paddleboards appear on the larger caiques. Fresh water on board runs 200 to 400 litres, enough for a short rinse rather than a shower. Shade covers 60 to 80 percent of a caique deck and about half a speedboat’s cockpit. Every one of the Sifnos boat trips is timed against it.
Passengers carry two towels, factor 50 sun cream, a wide hat, sunglasses with a strap, reef shoes for the shingle at Ammoudia, and 30 to 50 euros in cash for the taverna and the tip. A light windproof jacket matters from 16:00, when the return leg into a 15-knot northerly drops the felt temperature by six degrees. Motion-sickness tablets taken 45 minutes before departure suit passengers new to sifnos boat trips. The Sifnos boat trips route is set by it.
How do the meltemi winds shape Sifnos boat trips?
The meltemi blows from the north through July and August at 15 to 35 knots. Operators cancel at sustained force 5, shift departures to sheltered Platys Gialos and Vathi, and call passengers between 07:30 and 08:30 with the verdict.
The wind funnels between Serifos and Sifnos and hits the west and north coasts hardest, which closes Kamares departures for the Milos and Antiparos routes on the strongest days. The south coast sits in the lee, so Vathi and Platys Gialos keep running to Polyaigos and Kimolos in 20 to 25 knots, with the caique tucked under the Kimolian cliffs on the return leg. It decides which of the Sifnos boat trips to take. The Sifnos boat trips timetable is built on it.
Force 5 on the Beaufort scale, 17 to 21 knots, is the standard cut-off written into operator terms. Above it the Port Authority restricts small passenger vessels and rigid inflatables first. A cancelled sailing brings a full refund inside three to five working days or a free transfer to another date within the same season, chosen at the passenger’s discretion. Sifnos boat trips are sold on that.
Calm sailing concentrates in three windows: mid-May to mid-June, the first ten days of July, and 5 September to 15 October, when northerlies fall below 12 knots for days at a stretch. August delivers the strongest gusts, with 30-knot afternoons recorded across the central Cyclades. Booking sifnos boat trips for the first days of a stay leaves room to rebook after a wind cancellation. Passengers on Sifnos boat trips read it from the deck.
When does the season run and how far ahead do you book?
The season opens in May and closes in mid-October, with the fullest timetable from mid-June to mid-September. High-summer bookings need three to six days’ notice, minimum numbers of four to six passengers apply, and cancellation stays free to 24 hours before departure.
May and early June sailings run three or four days a week as crews finish maintenance and the water reaches 20 degrees. From 15 June to 15 September the Polyaigos and Kimolos cruise sails daily on wind, the Milos route four days a week, and the coastal circuit twice daily with a 10:00 departure and a 17:30 sunset run. October keeps two weekly sailings until the middle of the month. The Sifnos boat trips price reflects it. Crews handle it before Sifnos boat trips cast off.
Departures cluster between 09:30 and 10:00, timed for the morning lull before the afternoon breeze fills in. Sunset trips leave at 17:30 or 18:00 and return after dark in September. Boarding closes ten minutes before departure and skippers do not wait for late arrivals. The Sifnos boat trips fleet is fitted for it.
Operators sell through harbour-front kiosks in Kamares, hotel desks in Apollonia and Platys Gialos, and online forms that hold the seat without payment until 48 hours out. August fills first: the Polyaigos caiques book out three to six days ahead, and the 12-passenger rigid inflatables go a week ahead. Sifnos boat trips run only when the minimum of four to six passengers is met, so mid-week departures in May consolidate onto a single hull. That is the Sifnos boat trips difference.
Frequently Asked Questions
What do Sifnos boat trips cost?
From 55 to 95 euros per person for a shared full-day cruise with lunch and drinks, 40 to 70 euros for a half day, and 600 to 1,400 euros for a private speedboat or caique carrying six to twelve.
Where do Sifnos boat trips leave from?
From Kamares, the main port on the west coast, and from Platys Gialos and Vathi in the south, with Faros used on part of the programmes. Apollonia sits 10 to 25 minutes away by road.
What is the Polyaigos cruise from Sifnos?
A full-day run to the largest uninhabited island in the Aegean, eight nautical miles east, with white cliffs and milky turquoise bays at Kato Mersini, two or three swim stops and a 45 to 70 minute crossing each way.