The Greek Cyclades

• Region: central and southern Aegean, Greece, roughly 30 inhabited islands
• Scale: Athens to Mykonos about 90 nautical miles, Mykonos to Paros about 25, Mykonos to Santorini about 70
• Season: May to October, with the Meltemi at its strongest in July and August
• Defining wind: the Meltemi, a northerly that regularly runs force 6 to 7 for three to five days at a time
• Berthing: Tourlos marina on Mykonos has 222 berths but caps at 25 m and 3 m draft, so large yachts lie off
• Mykonos port rule: yacht movements in and out are prohibited between 09:30 and 10:30 for ferry traffic
• Santorini: no marina for a large yacht, caldera depths run from 50 m to several hundred, so moorings or a lunch stop only
• Mainland base: Flisvos Marina in Athens, 310 berths with more than half sized for yachts over 35 m
• Cruising tax: TEPAI, charged monthly, EUR 8 per metre per calendar month at superyacht sizes (rate current July 2026)
• New protection: a South Cyclades national marine park was announced in 2025 with environmental studies approved in December 2025, centred on trawling bans and no-fishing zones
• Jurisdiction: Greece, EU and Schengen, with separate charter licensing requirements
• Getting there: Mykonos and Santorini both have airports, Athens is the reliable one

Real distances, for once

This is the one Aegean ground where passage planning is a real exercise. Athens to Mykonos is about 90 nautical miles, or 70 from Lavrio, which is the sensible departure port. Mykonos to Paros is 25 miles, Paros to Santorini about 60, and Milos sits 60 miles west of Santorini across open water. The islands look close together on the chart and they are separated by channels where the wind accelerates.

A week from Athens is tight but workable. Lavrio to Kythnos or Syros on the first day, then Mykonos and Delos, Paros and Naxos, and back. Two weeks is where the Cyclades come alive, because the second week reaches Santorini, Folegandros, Sifnos and Milos, which is the western chain and the prettiest of the group. Owners who want to see Santorini and Mykonos in the same week should expect to spend two whole days on passage and should build in a spare day for the wind.

Milos, and the islands people skip

Milos is the best cruising island in the Cyclades and most itineraries underrate it. Kleftiko on the southwest corner is a set of white rock arches and caves in clear water and it is worth a full day, with Sikia cave and Gerakas nearby. Sarakiniko on the north coast looks like a moonscape and works in southerly conditions. On Polyaigos, the empty island east of Milos, there is a run of pale bays with nobody in them.

Elsewhere the pattern is one or two good bays per island. Off Mykonos the southern beaches, Psarou, Ornos and Super Paradise, are the social anchorages and they are exposed to the swell that the Meltemi pushes round the island. Naxos has long sandy bays on the west coast, Paros has Naoussa in the north and the channel to Antiparos, and Ios has the deep sheltered bay at Ormos. Rinia, the uninhabited island beside Delos, holds several quiet anchorages within tender range of the ruins.

The Meltemi decides where the boat sleeps, and no amount of money changes that.

Berthing, of which there is almost none

Almost nowhere alongside. Tourlos marina on Mykonos has 222 berths but a maximum of 25 metres and 3 metres of draft, so a large yacht either arranges space on the commercial quay at the new port or lies at anchor and tenders in. The port authority prohibits yacht movements in and out between 09:30 and 10:30 every day to clear the ferry traffic, which is the kind of detail that ruins a guest departure if nobody checked. Paros, Naxos and Syros have working harbours with limited alongside space and constant ferry movement.

Santorini has no answer at all for a large yacht. The caldera is a drowned volcano and the water goes from 50 metres to several hundred within a boat length of the cliff, so anchoring is not practical and yachts use laid moorings or simply stop for lunch and run the tender to Ammoudi. Vlychada on the south coast is a small harbour and not a superyacht berth. The practical structure for the whole region is a contract berth at Flisvos in Athens, which has 310 berths with more than half sized for yachts over 35 metres, and a cruise that runs out and back.

The Meltemi, and the months

May is beautiful and cool, with the sea still cold for swimming and the islands half open. June warms up and is the best all-round month. July and August are hot, dry and busy, and they are also when the Meltemi is at its most reliable. September is the crew's answer, with warm water, thinning crowds and lighter winds, and the first half of October is often the calmest fortnight of the year.

The Meltemi is a northerly that sets up when a high sits over the Balkans and a low over Turkey, and it runs force 6 to 7 for three to five days at a stretch, gusting harder through the channels and off the high islands. It does not build a long swell in the way an Atlantic wind does, but it produces a short steep sea that is genuinely unpleasant on the beam. The shelter is on the southern and western sides of each island. Crews plan the whole route so that the wind is behind them, which is why itineraries here tend to run north to south and then reposition.

When it fills, and what has changed

The fleet arrives in June, the charter season peaks from mid July to the third week of August, and it drops away sharply after the first week of September. Mykonos runs its own calendar, with the beach clubs opening in late May and the season built around DJ residencies and a nightlife economy that prices in August at Riviera levels. Santorini's peak is driven by cruise ship calls and day visitors, and the island is at its worst between eleven and six.

Two recent things are worth knowing. Santorini had an intense seismic swarm from late January 2025, with more than 12,000 tremors recorded and a state of emergency declared, and the island was declared safe for visitors again in March 2025, with a quieter 2025 season as a result. Separately, Greece has been pushing back on overtourism at both Santorini and Mykonos with cruise levies and access measures. Both mean the shore experience at the two famous islands is more managed than it was.

Athens is the airport that works

Athens is the airport that works. It has full long-haul and European connectivity, a proper general aviation operation, and Flisvos and Alimos marinas are half an hour away by road. Mykonos and Santorini both have airports that take business jets and both are congested and slot-limited in August, with short runways that restrict aircraft type. Paros has a small airport with domestic service.

The practical model most owners settle on is that guests fly to Athens, join the boat at Flisvos, and the yacht does the passage overnight. Direct joins at Mykonos work in June and September and are a gamble in August. Helicopter transfers between the islands are available and expensive, and they are the usual fix when a guest has to leave from Santorini in a hurry.

Mykonos, Delos and the tavernas

Mykonos is the money island and it is unapologetic. Nammos at Psarou beach is the name everyone knows and the bill matches, Scorpios at Paraga is the sunset venue, and Principote on the northern side at Panormos catches the other wind. The old town around Matoyianni and Little Venice is genuinely pretty at seven in the morning and unmanageable at seven in the evening. The nightlife is the best in the Aegean and it is also the most expensive thing on this coast.

Everywhere else is quieter and better value. Delos is a guided archaeological visit reached by tender, one of the most important sites in Greece, and it closes in the early afternoon. Santorini is about the caldera view, the Assyrtiko vineyards at Santo Wines and the fish tavernas at Ammoudi below Oia. Naoussa on Paros has a small fishing harbour ringed with restaurants and is the most pleasant evening in the group. Sifnos has a serious reputation for its island cooking.

TEPAI, fuel and the thin support

TEPAI, the Greek cruising tax, applies to all leisure vessels over seven metres in Greek waters whatever their flag, and at superyacht sizes it works out at EUR 8 per metre per calendar month, so a 50 metre boat pays EUR 400 a month, on the rate current in July 2026. It is paid online in advance and is checked. Chartering from Greek ports carries its own licensing regime, which has been reworked repeatedly and treats non-EU flagged yachts differently, and no owner should assume last season's structure still holds. A Greek agent is not optional here.

The support picture is thin away from the mainland. Syros has the Neorion yard and is the only meaningful technical capability in the Cyclades. Fuel at superyacht quantities is a genuine constraint, delivered by truck in limited volumes on most islands, so boats bunker at Piraeus, Lavrio or Syros and plan the cruise around tank capacity. Provisioning at the standard a large yacht expects is an Athens exercise, with stores sent out by ferry or carried aboard.

The honest downside

The wind is not a detail here, it is the whole planning problem. A Meltemi that sets in on the Tuesday of a one week charter will pin the boat on the southern side of two islands for the rest of the trip, and there is no version of the Cyclades where that does not happen sometimes. Guests who expect to step off in a marina every evening will be disappointed, because the boat is at anchor most nights and the tender ride can be wet.

The other honest point is the split between the famous islands and the rest. Mykonos and Santorini are expensive, crowded and heavily commercialised, and they are also the two islands most guests ask for. The islands that make the Cyclades worth a fortnight, Milos, Sifnos, Folegandros and Amorgos, have almost nothing ashore beyond a village and a taverna. An owner who wants both the nightlife and the emptiness will spend a lot of the cruise on passage between them.

Who it is for: An owner who is happy to live at anchor for a fortnight, wants real distances and empty islands, and has a captain who can read a northerly three days out.