The first glimpse of the Algarve’s golden cliffs from the water should feel out of this world, not like a battle to keep your breakfast down. Knowing how to prevent boat seasickness can make all the difference to a Benagil Cave tour, dolphin-watching trip or sunset cruise, particularly if you have not spent much time at sea.
Seasickness is common, unpredictable and nothing to feel embarrassed about. Even confident travellers can feel unsettled when a boat moves in a way their inner ear does not expect. The good news is that a little preparation, plus a few smart choices once you are onboard, can greatly improve your comfort and help you enjoy every spectacular stretch of coastline.
Why boat seasickness happens
Motion sickness occurs when the balance signals sent by your eyes, inner ear and body do not match. Your eyes may be focused inside the boat while your inner ear is registering the rise, dip and sideways motion of the sea. That mismatch can lead to nausea, sweating, dizziness, tiredness or a headache.
Sea conditions matter, of course. A calm morning on the Algarve can feel very different from a breezier afternoon, and offshore dolphin searches may involve more open-water movement than a sheltered coastal cruise. But your individual sensitivity, sleep, hydration, what you have eaten and where you sit can be just as influential.
The aim is not to worry about every possible wave. It is to arrive prepared, stay connected to the horizon and give your body the best possible chance to adjust.
How to prevent boat seasickness before you leave
Your preparation starts well before you step onto the marina pontoon. The night before, try to get a proper sleep and keep alcohol to a minimum. A late night followed by a hot, bright morning on the water is a classic recipe for feeling below par, even for people who do not usually suffer from motion sickness.
On the day of your trip, eat something light and familiar. Going out on a completely empty stomach can make nausea worse, but so can a large greasy breakfast. Think toast, cereal, fruit, yoghurt or a simple sandwich. Avoid very rich food, excessive caffeine and fizzy drinks if they tend to upset your stomach.
Hydration is equally useful. Drink water before departure, especially during a warm Algarve holiday, but do not overdo it immediately before boarding. Bring water with you and take small sips during the tour rather than waiting until you are thirsty.
If you know you are prone to seasickness, speak to a pharmacist before your trip. Motion-sickness tablets, wristbands and other remedies work differently from person to person. Some medicines need to be taken well in advance and may cause drowsiness, which is worth considering if you plan to drive afterwards or want to stay alert for dolphins. Follow the product guidance and ask for professional advice, particularly for children, pregnancy or existing medical conditions.
Ginger sweets, ginger tea and acupressure bands are popular non-medicated options. They may be enough for mild nerves or mild symptoms, although they are not a guarantee in rougher conditions. It is sensible to bring the option that works for you rather than relying on finding a remedy at the marina.
Choose the right time and type of tour
For many guests, the best first step is choosing conditions that suit them. Morning departures are often calmer before the afternoon breeze develops, though the sea can never be guaranteed and local conditions change from day to day. If you are concerned, ask about the forecast when planning your trip and be flexible where your holiday schedule allows.
Boat design and group size can also affect how relaxed the experience feels. A modern, well-maintained tour boat with individual seating gives you a secure place to sit, room to look ahead and easier access to fresh air. Smaller groups can feel less crowded, which is especially welcome if you are travelling with children or simply prefer a more personal experience.
A private charter may be a particularly good choice for a family member who is anxious about being on the water. It gives your group more flexibility and a calmer pace, although it does not remove the natural movement of the sea. For anyone with a history of severe motion sickness, a shorter coastal route may be more suitable than a longer trip in open water.
Where to sit and what to do onboard
Once you are underway, sit where the boat’s motion is usually least pronounced: low down and close to the centre of the vessel. The bow, or front, often rises and falls more noticeably, while seats right at the back can be affected by engine noise, fumes or spray depending on the boat and conditions. Your crew can point you towards the most comfortable available seat.
Keep your gaze outside and fixed on a stable point such as the horizon, distant cliffs or the coastline. This helps your eyes and inner ear make better sense of the movement. It is one of the simplest and most effective things you can do.
Fresh air is your friend. Feel the sea breeze, loosen a layer if you are too warm and avoid sitting in a stuffy enclosed area if that makes you uncomfortable. A hat and sunscreen are useful on bright days, but choose a secure hat or keep it packed away when the wind picks up.
Try not to spend the journey scrolling through your phone, reading a guidebook or checking photos. Looking down at a screen is a fast way to worsen nausea because it gives your eyes an even stronger signal that you are still. Save the messages and picture editing for dry land. The world-famous Benagil Cave and the dramatic rock formations along the coast are far better viewed in real time anyway.
Slow, steady breathing can also help if you feel unsettled. Instead of tensing up or focusing on the possibility of feeling ill, look outward, breathe deeply and let your body adjust to the rhythm of the boat. Conversation and listening to your skipper’s local commentary can be a useful distraction, provided you keep facing the horizon.
If you start to feel unwell
Act early. Do not wait until you feel seriously ill before telling a crew member. Licensed, experienced skippers and crew see seasickness regularly, and they would much rather help you feel comfortable at the first signs of nausea.
Move to a spot with fresh air if it is safe to do so, look towards the horizon and keep your head as still as possible. Take small sips of water. If you have ginger sweets or the medication recommended for you, use them as directed. Avoid strong smells, including perfume, food and exhaust fumes where possible.
You do not need to apologise or feel you have spoiled the experience. The crew’s priority is everyone’s safety and comfort, and a few practical adjustments can prevent a mild wave of nausea from taking over your day.
Extra care for children and first-time boat guests
Children can be more susceptible to motion sickness, especially if they are excited, overtired or have skipped breakfast. Explain beforehand that the boat may move and that they should tell an adult quickly if their tummy feels funny. Give them a light meal, water, sun protection and a layer for the breeze.
Keep them looking at the coast or searching for dolphins rather than playing games on a phone. A simple wildlife-spotting challenge works brilliantly: who can spot a seabird first, see a hidden beach, or notice the next rock arch? It keeps young travellers engaged with the adventure while helping them focus outside the boat.
For first-time guests of any age, confidence often comes from knowing what to expect. The boat may speed up between coastal highlights, slow down for commentary or wildlife, and move differently once it reaches more open water. That movement is normal. Arriving early, listening to the safety briefing and asking questions before departure can make the whole experience feel more relaxed.
Algarve Cave Tours operates from Vilamoura Marina with experienced local crews who know the coastline and changing sea conditions. Choose a departure that suits your group, prepare sensibly and let the sea air do the rest. With your eyes on the horizon and the Algarve’s breathtaking coastline ahead, you will be in the best position to enjoy the moment you came for.