When you plan a dream vacation, you might look at pictures of sparkling pools, world-class food, and grand rooms. You see many types of ships that offer different things. Some ships focus on non-stop fun for the whole family. Other ships offer a quiet, high-end escape for people who want to relax. Each type of ship changes the way you see the world.
As you look at these options, you might think about the time you will spend on the water. You might think about how long it takes to get from one famous city to another. This might make you wonder, “How Fast Do Cruise Ships Go?” In this article, you’ll discover the answer to that question and many more.
TL;DR
Most modern ships travel at an average speed of 18 to 22 knots (about 20 to 25 mph). Top speeds can reach 30 knots (35 mph), but ships rarely go that fast to save fuel and keep guests comfortable. Speed depends on the type of ship, the weather, and the travel plan.
The Standard Pace: Knots vs. Miles Per Hour
If you want to know how fast cruise ships go, you first need to understand how the crew measures speed. Sailors do not use miles per hour (mph) as we do in a car. Instead, they use a unit called a knot.
One knot is equal to one nautical mile per hour. A nautical mile is based on the size of the Earth and the way we map the globe. It is slightly longer than a mile on land. One knot equals about 1.15 mph.
- Average speed: Most ships move at 18 to 22 knots. This is like driving 20 to 25 mph on a road.
- Top speed: Some large ships can hit 30 knots. This is about 34 to 35 mph.
Speed Comparison at a Glance
| Vessel Type | Average Speed (Knots) | Top Speed (Knots) |
| Large Ships | 18–22 | 24–30 |
| Expedition Ships | 14–17 | 18–20 |
| Ocean Liners | 24–26 | 30+ |
| River Cruises | 7–10 | 12 |
Factors That Change Your Ship’s Speed
Captains do not always sail at the same speed. They change the speed for many reasons. A captain’s main job is to keep the ship safe and the guests happy. They also have to think about the environment. Here are the three main things that affect how fast you move.
1. Comfort for Guests
If a ship goes too fast, it can start to shake or vibrate. High speeds can also cause “sea spray” to hit the lower decks. This can make it hard to sleep or enjoy a nice meal. To keep the air calm and the deck steady, captains usually keep a moderate pace. This ensures you can enjoy a quiet and stable environment while you travel.
2. The Travel Plan
The distance between ports is a big factor. If the next city is far away, the ship may go faster at night. This helps you wake up in a new place on time for your morning tour. If the ship is passing a beautiful coast, like the fjords of Norway, it will slow down. This gives you time to take photos and enjoy the view.
3. Saving Fuel and the Environment
Modern travel aims to be green and protect nature. Going just a few knots slower saves a lot of fuel. It also lowers the carbon footprint of the trip. Many cruise lines now use “slow steaming” to protect the ocean and whales. This is a very important part of travel today.
Does the Size of the Ship Matter?
You might think small ships are faster than big ones, but that is not always true. The shape and the purpose of the ship matter more.
Ocean Liners
Large Ocean Liners are built to cross big oceans quickly. They have long, deep hulls that cut through large waves easily. For example, the Queen Mary 2 is built for speed. It can go over 30 knots because it has a special design for the North Atlantic.
Expedition Ships
Expedition Ships are different. These ships are built for places like Antarctica or the Galápagos Islands. They are small and very strong. They do not need to go fast. Instead, they need to be easy to move in tight spaces. They use their power to stay stable in icy water or to park in small bays where big ships cannot go.
River Cruises
River cruise ships are the slowest of all. They travel on rivers like the Danube or the Rhine. These ships usually go about 7 to 10 knots. They move slowly because rivers are narrow and have other boats. Plus, the best part of a river cruise is seeing the castles and towns as you glide past.
Understanding Maritime Speed
When we talk about how fast ships go, we have to look at how they move through the water. Water is much thicker than air. It takes a huge amount of energy to push a ship forward. This is why a ship going 20 mph feels much faster than a car going 20 mph. You are moving thousands of tons of steel through the ocean.
Why do we use knots?
The word “knot” comes from an old way of measuring speed. Centuries ago, sailors used a piece of wood attached to a long rope. The rope had knots tied at specific distances. They would toss the wood into the water and count how many knots went out in a certain amount of time. Even though we use modern computers and GPS today, we still use the word knots. It is a part of sea history that never went away.
The Physics of Speed and Fuel
There’s a technical side to how fast cruise ships go. Most ships have a “hull speed.” This is the speed at which the ship is most efficient. If the ship tries to go faster than this, it uses a massive amount of extra fuel for very little gain in speed.
Fuel Costs
Fuel is one of the highest costs for a cruise line. When a ship speeds up, the cost of the trip goes up very quickly. By keeping a steady pace of 18 knots, a ship can save thousands of dollars compared to going 24 knots. This also helps keep the price of your ticket lower.
Marine Life Safety
Going slower is also safer for animals. In many parts of the world, there are speed limits for ships. These limits exist to protect whales and other sea creatures from being hit. Captains follow these rules strictly to make sure they are good guests in the ocean.
Modern Technology and Speed
Today’s ships use amazing technology to move through the water. Some ships use “azipods.” These are giant propellers that can turn 360 degrees. They help the ship move in any direction and can even help it stop faster.
Other ships use “air lubrication” systems. These systems blow tiny bubbles under the ship’s hull. The bubbles act like a layer of air, which reduces friction. This helps the ship move faster or use less fuel to go the same speed. It is like the ship is sliding on a cushion of air.
Common Questions About Ship Speed
Is 20 knots fast for a ship?
Yes, 20 knots is a very good speed for a large ship. While it sounds slow compared to a highway speed, it is quite fast for a vessel that is the size of a city block. It allows the ship to cover hundreds of miles in a single night.
Do ships go faster at night?
Often, yes. Captains may increase the speed at night so guests can reach their next destination by the morning. This happens while you are sleeping, so you don’t feel the extra speed or vibration. During the day, they may slow down so you can enjoy the sun and the view from the deck.
Can a cruise ship outrun a storm?
In most cases, yes. Ships use advanced weather tools to see storms long before they arrive. Because they can move at 20 knots, they can usually steer around a storm or move away from it. The safety of the guests is always the most important thing.
Why do some ships look like they are barely moving?
When you look at a ship from the shore, it might look slow. This is because the ship is so large. The scale makes the movement look slower than it really is. If you were on a small boat next to a cruise ship going 20 knots, you would see just how fast it is really going!
Experience the Magic of the Sea
The speed of your ship is just one part of your travel story. Whether you are racing across the Atlantic on a fast liner or drifting slowly through a tropical bay, the pace is designed to give you the best experience possible. At the end of the day, a cruise is about the joy of the journey. The rhythm of the waves and the steady hum of the engines create a feeling of peace that you can’t find anywhere else.
Knowing the details, like how knots work or why ships slow down for whales, makes you a more informed traveler. It helps you appreciate the hard work the crew does to make your trip perfect. Next time you are on the deck looking at the wake behind the ship, you will know exactly what is happening under the surface.
Start Your Next Journey With Labbe Travel
If you have more questions about how fast cruise ships go or want to find the perfect ship for your next escape, we are here to help. At Labbé Travel, we know that every traveler is unique. We take the time to learn what you love so we can find the right match for you. Whether you want a fast-paced adventure or a slow, quiet retreat, our experts can guide you.
We have first-hand experience with the world’s best ships and destinations. We can help you pick a ship that has the right speed and the right vibe for your dream vacation. Please feel free to contact us today to begin planning your next extraordinary adventure. We look forward to turning your travel dreams into a reality that is as special as you are.