What is the Beaufort scale?

The Beaufort scale is a way of describing wind force on a scale from 0 to 12, where 0 is a flat calm and 12 is a hurricane. Its cleverness is that each number is matched to what you can actually observe — the state of the sea, the movement of waves, the spray — so that a wind can be described consistently by anyone, anywhere. It was developed in the early nineteenth century by the British naval officer Sir Francis Beaufort to give sailors a shared, unambiguous language for the wind.

What Beaufort number is too rough for a Greek ferry?

There is no single fixed cut-off, because it depends on the vessel, the route, the wind direction and the operator's judgement. As a rough guide, large conventional ferries handle Beaufort 6 comfortably and often continue in 7, while high-speed catamarans become sensitive around Beaufort 6 and are frequently cancelled at 7 and above. But these are tendencies, not rules. The only people who decide whether a ferry sails are the operator and the Hellenic Coast Guard.

What does the Beaufort scale NOT tell you?

It does not tell you whether your ferry will sail. Beaufort describes wind force; it does not account for the specific vessel, the exact route and how sheltered it is, swell left over from earlier weather, the direction of the wind relative to your crossing, or an operator's commercial and safety decisions. A Beaufort number is superb context for planning, but it is never a substitute for the official schedule, the operator's announcement, or a Coast Guard port decision.

How should a traveller actually use the Beaufort scale?

Use it as an early-warning and expectation-setting tool. Check the Beaufort forecast for your route and date a few days ahead, so you know whether to expect a smooth or a lively crossing. Let it guide small choices — travelling earlier in the day, choosing a larger vessel, or leaving a buffer day around important connections. Then confirm the actual sailing through the operator on the day. Beaufort tells you what kind of day it might be; the operator tells you what is happening.

Teleporio™ — Greek Island Travel Intelligence

Why the Beaufort Scale Matters When Greek Island-Hopping

What the Beaufort scale is, what it tells you about Aegean crossings — and what it can't. A practical guide for planning Greek ferry travel.

Teleporio™ travel intelligence — Updated 2026-07-24

You will hear the word constantly once you start planning island travel in Greece — Beaufort. For something so widely used it is surprisingly simple, and understanding it does two things at once: it helps you plan a better trip, and it teaches you exactly where the limits of your own planning lie.

What the Beaufort scale actually is

The Beaufort scale describes the force of the wind from 0, a dead calm, to 12, a hurricane. What made it endure is that it does not rely on instruments alone: each number is tied to things you can see, from the first whitecaps to the streaks of foam of a real gale. It was developed in the early nineteenth century by Sir Francis Beaufort, a British naval officer, who wanted to end the confusion of sailors describing the same wind in different ways. That standard vocabulary of the wind is still in daily use across the Aegean, and it is documented maritime history.

Wind force and sea state at a glance

As a feel for the scale rather than a prediction: Beaufort 0 to 2 is effortless; 3 to 4 is comfortable for most travellers; 5 brings noticeable motion that fast craft feel; 6 is lively and can affect catamarans; 7 is rough and often cancels fast craft; and 8 and above is disruptive enough that even large ferries may wait. These are tendencies, not rules — actual conditions depend on the vessel, the route, swell and wind direction.

Why travellers should understand it

Knowing roughly where a crossing sits on the scale turns anxiety into planning. A forecast of Beaufort 3 to 4 means you can relax; a climb toward 6 means you can prepare, by travelling earlier, choosing a larger vessel, or leaving flexibility around a tight connection. It also helps you interpret a cancellation calmly: a cancelled fast crossing is a sensible decision by people who know that sea far better than you do.

What the Beaufort scale does not tell you

A Beaufort number is context, not a decision. On its own it cannot tell you whether your ferry will sail, how your specific route feels, the effect of leftover swell and wind direction, or how a particular vessel will behave. Whether a ferry sails is decided entirely by the operator and the Hellenic Coast Guard, who close ports and hold vessels when conditions demand it, and who have far more information than any public forecast. Your job is simpler: to understand what is likely, to plan with flexibility, and to accept the professionals' decisions gracefully.

Putting it to practical use

In practice the Beaufort scale is best used as a quiet planning companion. Check the forecast for your route and date a few days ahead, use it to shape small choices, and then confirm the real sailing through the operator on the day. The forecast sets your expectations; the operator confirms reality. Teleporio is built to make this easy, bringing the wind together with ferry and flight options and travel times for your actual crossing.