The Cyclades reward a yacht that moves. What that movement costs in diesel — billed quietly through the APA — is the line that most reshapes an Aegean week's budget.
A principal plans a Greek-island charter and pictures the islands, not the engine room. Yet the Aegean is a cruising ground of real distances and frequent meltemi headwinds, and a yacht that hops Mykonos to Santorini to Milos burns serious diesel doing it. That fuel is billed at cost through the APA, rarely totalled in advance, and routinely the single largest variable after the base fee. Here is the realistic arithmetic, by yacht size, so the number holds no surprises.
Fuel consumption on a motor yacht is not linear with speed, and this single fact governs the entire economics of an Aegean itinerary. A displacement or semi-displacement hull burns roughly with the cube of its speed: lift the speed by a modest amount and the hourly burn climbs steeply, because pushing a heavy hull faster through water demands disproportionately more power. The practical consequence is that the difference between a relaxed cruising speed and a hurried one is enormous in litres — and therefore in euros.
Two levers dominate the fuel bill. The first is size: a larger yacht carries bigger engines and a heavier hull, and burns far more per hour at any given speed. The second is how you cruise: a week of short, gentle passages between neighbouring islands at economical speed costs a fraction of a week spent making long, fast transits to chase a wider itinerary. In the Aegean a third factor intrudes — the meltemi, the strong summer northerly that forces yachts to push harder into headwind and sea, lifting consumption above the calm-water figures. Understanding these drivers turns fuel from an unpredictable shock into a planned, itinerary-driven cost.
The table below sets out indicative diesel consumption for motor yachts of increasing size, at a relaxed cruising speed of roughly ten to twelve knots and, separately, at a faster transit pace. Figures are litres per hour and are illustrative planning ranges for displacement and semi-displacement motor yachts; an individual yacht's actual burn depends on her hull, engines, load and the sea state. Sailing yachts under canvas burn a small fraction of these figures, using engines mainly for manoeuvring and calms.
| Yacht size | Cruising burn (10–12 kn) | Faster transit burn | Indicative cost per cruising hour* |
|---|---|---|---|
| 30 m motor yacht | ~100–180 L/hr | ~250–400 L/hr | €150–€290 |
| 40 m motor yacht | ~180–300 L/hr | ~400–650 L/hr | €290–€480 |
| 50 m motor yacht | ~250–400 L/hr | ~600–900 L/hr | €400–€640 |
| 60 m motor yacht | ~350–550 L/hr | ~800–1,300 L/hr | €560–€880 |
| 70 m+ motor yacht | ~500–800 L/hr | ~1,200–2,000 L/hr | €800–€1,280 |
*Cost per hour assumes marine diesel at roughly €1.40–€1.60 a litre, a representative Mediterranean dock band; prices move with the market and the bunkering location. Read these as ranges to plan around, not quotations.
The romance of the Greek islands obscures a practical truth: the popular Cyclades itinerary covers real distance, and distance is fuel. The marquee hops are not trivial day-sails. Mykonos to Santorini is roughly 65 nautical miles; Athens (the common embarkation point at Athens or Lavrio) out to Mykonos is around 90 miles; Santorini across to Milos is some 45 miles; and a full Cyclades loop that takes in Paros, Naxos, Ios and Folegandros alongside the headline islands easily totals 300 to 500 nautical miles over a week.
At a cruising speed of around eleven knots, that 65-mile Mykonos–Santorini leg is close to six hours under way; a 90-mile transit is eight or nine. Multiply those hours by the burn rates above and the fuel line takes shape. The meltemi compounds it: when the summer northerly blows hard, as it often does in July and August, a yacht heading north or into the sea must work harder, lengthening passages and lifting consumption. An itinerary planned around the wind — running with it where possible, choosing sheltered hops on the worst days — is not only more comfortable but materially cheaper in diesel. Distance, speed and weather together write the fuel bill.
Charter fuel is not a separate invoice you negotiate; it is settled through the Advance Provisioning Allowance, the float you pay before departure from which the captain meets the running costs of the charter. Fuel is typically the largest single draw on that float. Under standard MYBA terms every litre is charged at cost — the owner, crew and broker take no mark-up — and the unspent balance of the APA is returned to you at the end of the week.
The discipline is to read the APA as a real, itinerary-driven cost rather than a deposit, and to ask for a daily expenditure log so fuel and the other running costs are reconciled transparently. A well-run yacht volunteers this; the figure should never be a mystery.
Consider a representative charter: a 50-metre motor yacht on a classic Cyclades week from Athens, taking in Mykonos, Santorini, Milos and a couple of quieter islands, on a medium-activity itinerary with a mix of transit days and days at anchor. A sensible plan covers perhaps 350 to 450 nautical miles, which at a cruising speed of around eleven knots is in the order of 32 to 42 hours under way across the week.
At a cruising burn of roughly 250 to 400 litres an hour, that is approximately 9,000 to 15,000 litres of diesel over the week. At €1.40 to €1.60 a litre, the fuel line lands at roughly €13,000 to €24,000 — before generator hours at anchor, tender and watersports fuel, which add a further margin. Push the itinerary harder, fight a strong meltemi, or step up to a 60- or 70-metre yacht, and the figure climbs accordingly; choose gentle hops and more time at anchor and it falls. The point is that the fuel bill is not random — it is the direct, calculable product of the yacht's size, the distance you ask her to cover and the speed you ask her to hold. Settle the itinerary and the number is knowable before you sign.
Because fuel is itinerary-driven, it is also itinerary-controllable, and a little planning saves a great deal of diesel without diminishing the holiday. The levers are straightforward and entirely within a principal's gift if someone sets them out in advance.
Done well, the fuel position is modelled before the charter is confirmed — size, route, speed and weather translated into a litre estimate and a euro figure with a sensible contingency — so the APA is set realistically and the end-of-week reconciliation holds no surprises. That is the entire value of planning the burn rather than discovering it.
We do not flatter brochures or under-set an APA to win a booking. Through the Obsidian Helm Marketplace we source and vet yachts on your behalf, and model the full reconciled cost of an Aegean week — base fee, a fuel estimate built from your actual itinerary, APA at the correct vessel-class percentage, berthing and gratuity — before any contract is presented. We negotiate terms with vetted broker partners, remain your single point of contact, and are remunerated by referral arrangement rather than a mark-up on your fuel or your bill. Request a private introduction to begin.
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It depends almost entirely on size and itinerary. A 50-metre motor yacht cruising the Cyclades at around eleven knots burns roughly 250 to 400 litres an hour, so a typical week covering 350 to 450 nautical miles uses about 9,000 to 15,000 litres — in the region of €13,000 to €24,000 of diesel before generator and tender fuel. A larger yacht or a harder itinerary costs proportionally more.
Because a displacement hull burns roughly with the cube of its speed. Increasing speed by a modest amount raises the hourly fuel burn steeply, since pushing a heavy hull faster demands disproportionately more power. Shaving two or three knots off a transit can cut that leg's fuel substantially, which is why an unhurried itinerary is markedly cheaper in diesel.
Fuel is settled through the Advance Provisioning Allowance, the float you pay before departure, and it is usually the largest single draw on it. Under standard MYBA terms every litre is charged at cost with no mark-up, evidenced by bunkering receipts, and the unspent APA balance is returned at the end of the charter. A fuel-heavy itinerary can exhaust the float and prompt a mid-charter top-up.
Yes. The meltemi is the strong summer northerly that blows across the Aegean, often hard in July and August. A yacht heading north or punching into the sea must work harder, which lengthens passages and lifts consumption above calm-water figures. Planning an itinerary that runs with the wind where possible, and choosing sheltered hops on the windiest days, lowers both the fuel bill and the discomfort.
Yes, and it should be. The fuel bill is the calculable product of the yacht's size, the distance of the itinerary and the speed she holds. Given the route and the yacht, a competent broker translates that into a litre estimate and a euro figure with a sensible contingency, so the APA is set realistically and the end-of-week reconciliation holds no surprises. We model this before any charter is confirmed.
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