The mistral, libeccio, sirocco, and bora can make a crossing more challenging, causing waves, rolling, and difficulties in maneuvering. But what types of winds can cause ferry and hydrofoil departures in the Mediterranean to be canceled? And why might a hydrofoil remain in port while a ferry continues its journey?
The answer depends on the wind’s strength and direction, the duration of the weather event, the route’s exposure, and the boat’s characteristics. A crossing between Genoa and Sardinia, for example, involves different conditions than a crossing between Bari and Albania.
Knowing the main winds helps you understand how rough seas form, which routes are most affected by weather conditions, and why some departures are canceled.
What winds cause the sea to rise and trigger storm surges?
The wind transfers energy to the sea surface and generates waves. Their height depends primarily on wind speed, the duration of the wind, and the distance of open water over which it acts, known as fetch. Water depth and the shape of the coastline can also influence wave motion.
In the Mediterranean, certain winds are particularly significant and can affect ferry and hydrofoil departures.
Mistral, from the northwest. It is typical of the western Mediterranean and can cause rough seas in exposed areas, especially around Sardinia and Corsica. When strong mistral winds blow, ferry and hydrofoil departures may be subject to changes.
Libeccio, from the southwest. It can cause storm surges along coasts exposed to this direction and create difficult conditions in various parts of the Tyrrhenian Sea.
Scirocco, from the southeast. It can blow for many hours and affect large areas of the central Mediterranean and the Adriatic, promoting wave formation.
Bora, from the northeast. It is particularly significant in the Adriatic, where it can produce intense gusts and even complicate maneuvers in ports.
Grecale, from the northeast, and Tramontana, from the north. These winds can affect navigation when they directly impact a route or an exposed stretch of sea.
Ponente, from the west. It can contribute to wave action in areas exposed to westerly winds.
Strong winds do not necessarily lead to significant storm surges. A strong but short-lived wind can have different effects than a weaker wind that blows for a long time over a large area of the ocean.
When is the wind too strong for ferries and hydrofoils?
There is no single wind speed that applies to all ferries and hydrofoils beyond which service is automatically suspended. The decision depends on the vessel’s characteristics, sea conditions, the route, and operational and safety assessments.
The Beaufort scale helps describe wind intensity: Force 7 corresponds to a strong wind, with an average speed between 28 and 33 knots, while Force 8 indicates a gale, with speeds between 34 and 40 knots. These values describe weather conditions but do not represent automatic cancellation thresholds for every vessel.
In port, wind can make mooring and departure maneuvers more difficult. On the open sea, wave height and direction also become critical factors. For this reason, a high-speed ferry service may be suspended while a conventional ferry continues to operate, or both services may be canceled.
To find out what to do if a departure is suspended or canceled, read FerryFinder’s guide on ferry departures canceled due to high winds.
The Most Treacherous Winds in the Tyrrhenian Sea: Ferries to Corsica and Sardinia
In the Tyrrhenian Sea, the mistral and libeccio winds can affect crossings between the Italian peninsula, Sardinia, and Corsica. The effects depend on the exposure of the stretch of sea and the position of the weather systems.
The Mistral between Sardinia and Corsica
Coming from the northwest, the mistral can generate significant waves in exposed stretches of sea, particularly along the western coast of Sardinia and around Corsica.
The Route Genoa–Porto Torres is an example of a crossing where it is important to assess conditions along the route, not just those forecast at the ports of departure and arrival. The same principle applies to the route Livorno–Bastia, between Tuscany and Corsica.
The presence of an island does not necessarily guarantee sheltered sailing: the effect of the coastline depends on the direction of the wind and the boat’s position.
The Libeccio and the Scirocco in the Tyrrhenian Sea
The libeccio, blowing from the southwest, can cause rough seas along exposed coastlines. The sirocco can also make some crossings challenging when it blows for an extended period and contributes to wave formation.
It is impossible to say definitively which of the two is more problematic: conditions vary depending on the position of the disturbance and the orientation of the flight path.
For those traveling by ferry from Genoa or Livorno to Sardinia, it is therefore helpful to check the forecast for the entire journey.
Winds in the Mediterranean: Departures for North Africa
In the southern Mediterranean, the sirocco and westerly winds can affect ferry and hydrofoil crossings between Sicily and the North African coast. The Strait of Sicily is particularly important for voyages to Tunisia.
The sirocco comes from the southeast and can blow for extended periods, promoting wave formation when conditions in the bay allow. On the Palermo–Tunisroute, for example, it is important to assess sea conditions along the entire route and not just those forecast near the two ports.
The connection Genoa–Tunis passes through different bodies of water, so wind conditions may vary during the voyage.
The mistral and westerly winds can also affect the central Mediterranean. The wind’s direction relative to the course is crucial: a headwind, a crosswind, or a tailwind can have different effects, even at the same intensity.
In addition, the sea may remain rough even after the wind has died down, because the waves that have already formed continue to propagate.
Sicily, the Strait of Messina, and Sardinia: Local Marine Weather Conditions
The shape of the coastline, the presence of islands, and ocean currents can affect navigation even when general weather conditions appear to be similar.
Sicily and ferry and hydrofoil connections to the islands
Around Sicily, the Strait of Sicily, the Strait of Messina, and the stretch of sea leading to the Aeolian Islands each have distinct characteristics. Mistral winds may affect areas exposed to the northwest, while the sirocco may affect areas open to southerly and southeasterly winds.
On routes to the smaller islands, even a relatively small area of rough seas can affect hydrofoil operations, especially on the most exposed routes.
The Strait of Messina: Wind and Currents
The Strait of Messina is characterized by currents linked to the tides and the shape of the strait between Sicily and Calabria. Wind, therefore, is not the only factor to consider: currents can interact with wave motion and alter local conditions.
For the routes between Villa San Giovanni and Messina, the navigation assessment takes into account the specific conditions of the strait and the applicable operating procedures.
Sardinia: Exposure to Westerly Winds
In Sardinia, wind conditions vary along the western, northern, and eastern coasts. The mistral and libeccio winds can be significant in exposed areas, but the intensity of rough seas depends on the specific weather conditions.
Those traveling on the routes Genoa–Porto Torres or Livorno–Olbia should check the forecast for the entire route. The weather conditions observed at the port of departure do not necessarily reflect the conditions that will be encountered at sea.
Bora and sirocco winds in the Adriatic, westerly winds in the Ionian Sea
The Adriatic and Ionian Seas have different geographical characteristics. In the Adriatic, the bora and sirocco winds are particularly significant, while in the Ionian Sea, southerly and westerly winds can also have an impact.
Bora and Scirocco in the Adriatic: Ferry and Hydrofoil Departures
The bora comes from the northeast and is particularly well knownin the northern Adriatic, where it can produce intense gusts. The sirocco, coming from the southeast, can affect large parts of the basin and contribute to wave formation when it persists.
Conditions vary from one area to another. Some useful routes for understanding how the wind can affect crossings are:
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Ancona–Split: crosses the central Adriatic, where the effects of the bora and the sirocco depend on weather conditions.
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Bari–Durrës: connects Puglia to Albania across the southern Adriatic.
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Bari–Igoumenitsa: crosses the Strait of Otranto and continues on to Greece, in a transitional area between the Adriatic and Ionian Seas.
These examples do not imply that every occurrence of the bora or scirocco will cause delays or cancellations. The assessment depends on the actual conditions along the route and the characteristics of the ship.
The Treacherous Winds of the Ionian Sea
In the Ionian Sea, southerly and westerly winds—including the libeccio—can make ferry and hydrofoil crossings more challenging under certain weather conditions.
The Brindisi–Corfu route, which covers the northern Ionian Sea and the Strait of Otranto, is an example of a route for which it is important to check the forecast for the stretch of sea being crossed. Wind direction and wave height affect sailing conditions, while the shape of the bay determines how much space the wind has to generate waves.
Strong winds and ferry and hydrofoil departures
Ferries and hydrofoils react differently to wind and waves. These differences depend on the vessel’s structure, size, speed, and the conditions for which it was designed.
Why hydrofoil departures may be canceled due to wind
Hydrofoils are high-speed vessels used primarily on short-distance routes and for travel to the islands. Their lift system allows the hull to rise out of the water when certain operating conditions are met, reducing drag and increasing speed.
This system does not eliminate the limitations imposed by wind and waves. When sea conditions exceed the permitted operating limits, the voyage may be slowed down or suspended. Crosswinds can also complicate navigation and maneuvering.
There is no universal wave height threshold that applies to all hydrofoils: the limits depend on the model and the characteristics of the vessel.
Why Ferries Can Sail Even in Windy Conditions and Rough Seas
Traditional ferries are generally larger and designed to handle crossings that can last several hours. Their size, displacement, and hull characteristics affect how they react to waves.
This does not mean they are immune to rough seas. As we have seen, strong winds can also cause the cancellation of departures for both ferries and hydrofoils when navigation safety is compromised
Comfort on board depends on the direction of the waves, rolling, pitching, and the ship’s characteristics. A ferry may offer a more stable crossing under certain conditions, but it does not necessarily guarantee the absence of motion perceptible to passengers.
A high-speed ferry may be suspended while a conventional ship continues to sail in the same area, because the two vessels may have different operational limits. The route and exposure to wave action also play a role.
To learn more about the characteristics of these two types of vessels, read FerryFinder’s guide on the difference between ferries and hydrofoils.
The Wind Rose: Names, Directions, and Fun Facts
The wind rose shows the directions from which winds come. It is a traditional navigational tool that is still useful today for interpreting weather forecasts and marine bulletins.
The traditional compass rose identifies eight main directions.
- Tramontana, from the north. It is the northern wind; the name stems from an ancient linguistic and geographical tradition.
- Grecale, from the northeast. The name refers to Greece in traditional Mediterranean nautical geography.
- Levante, from the east. It indicates the direction in which the sun rises.
- Scirocco, from the southeast. It originates from the southeastern sector and can carry warm air from North African regions.
- Ostro, from the south. It is also called “mezzogiorno,” referring to the southern direction.
- Libeccio, from the southwest. The name is traditionally linked to Libya in Mediterranean nautical geography.
- Ponente, from the west. It indicates the direction in which the sun sets.
- Mistral, from the northwest. It is one of the best-known winds in the western Mediterranean and is particularly important for navigation around Sardinia and Corsica.
The compass rose can also be divided into sixteen or thirty-two directions, with intermediate directions such as north-northeast or south-southwest. These distinctions are useful because a change in wind direction can alter the way the wind affects a coastline or a route.
The Names of the Winds and the History of Navigation in the Mediterranean
The compass rose developed alongside Mediterranean navigation and the growth of maritime trade during the Middle Ages. Between the 13th and 14th centuries, nautical charts already used orientation systems based on eight principal directions, which were then subdivided into sixteen and thirty-two winds.
The traditional names retain geographical references. According to a widely accepted explanation, using the Greek island of Zakynthos as a reference point, the grecale indicates the direction of Greece, the scirocco that of Syria, and the libeccio that of Libya. The origins of some names, however, are disputed.
Malta played an important role in the history of Mediterranean navigation thanks to its location between Sicily and North Africa. The archipelago lay along routes connecting the western and eastern Mediterranean and served as a strategic hub for maritime trade. However, it was not the conventional geographical reference point from which the names of the compass points are derived.
Even today, terms such as “maestrale,” “sirocco,” and “libeccio” bear witness to the Mediterranean’s long maritime tradition.
How to Prepare for a Crossing in Strong Winds
Before you leave, check the wind and wave forecasts for the area and the times of your crossing. If your trip involves traveling between an island and the mainland, also consider the conditions along the route.
Check the company’s updates: a forecast of strong winds doesn’t automatically mean that ferry and hydrofoil departures will be canceled. If you get seasick, it may be helpful to prepare in advance and follow a few tips to make the trip more comfortable. You can find suggestions in FerryFinder’s guide on how to travel safely by ferry when the sea is rough.
In the event of a cancellation, follow the official announcements and the airline’s instructions to check what alternatives are available.
See also our our article on travelers’ rights and ticket refund procedures.
All the information about ferries and hydrofoils on Ferryfinder.com
The mistral, libeccio, sirocco, and bora can affect navigation in the Mediterranean, but sea conditions also depend on the duration and intensity of the wind, the direction of the waves, and the route’s exposure.
Search for your next ferry crossing on FerryFinder: compare ferry routes, schedules, and prices, and check the latest marine weather forecasts, also available on the pages dedicated to individual routes. This will allow you to assess the expected conditions for your trip before booking and plan your departure with greater confidence.
Remember that the weather can change: before heading to the port, always check the shipping company’s updates for any delays or cancellations.
