You’ve paid for your trip, packed your gear perfectly, and dreamed of playing with the sea lions at Isla San Pedro Nalasco. You step onto the dive boat, the captain throttles up the engines, and as you hit the open swells of the Sea of Cortez… it hits you. The cold sweat. The dizziness. The sudden realization that the breakfast you just ate wants to make a reappearance.
Seasickness is the ultimate dive-trip ruiner. It does not care if you are a newly certified Open Water diver or a veteran instructor with thousands of dives. The ocean is powerful, and sometimes, our inner ears simply don’t agree with the motion.
But here is the good news: you do not have to suffer. With a little bit of preparation and some strategic boat habits, you can conquer motion sickness. Here is your ultimate guide to keeping your stomach calm and your dives spectacular in San Carlos.
The Golden Rule: Prevention, Not Cure
The single most important thing to know about seasickness is that once you feel nauseous, it is almost impossible to stop it with medication. You must stay ahead of it. Medication is a shield, not a cure.
- The Timing Hack: If you are using over-the-counter medications like Dramamine, Bonine, or meclizine, taking a pill as you step onto the boat is too late. The veteran diver trick is to take one dose the night before your dive before bed, and a second dose in the morning when you wake up. This ensures the medication is fully in your bloodstream before you ever see a wave.
- The Patch: For those highly susceptible to motion sickness, ask your doctor for a prescription Scopolamine patch. You place it behind your ear the day before your trip, and it provides a steady dose of medication for up to three days.
- Natural Remedies: If you prefer to avoid medications (which can sometimes cause drowsiness), ginger is your best friend. Start taking ginger capsules a few days before your trip, drink ginger tea in the mornings, or bring candied ginger on the boat.
Prep Your Gear on the Dock (The “Look Down” Danger)
Your eyes and your inner ear are constantly sending signals to your brain. Seasickness happens when those signals don’t match. When the boat is rocking, your inner ear feels the movement. But if you are staring down at your BCD trying to thread a tank cam-band, your eyes are looking at a stationary object. Your brain panics, and you get sick.
The Solution: Do absolutely everything you can while the boat is securely tied to the dock. Assemble your scuba unit, check your air pressure, apply defog to your mask, and lay out your fins. Once the boat leaves the marina, your only job should be sitting back and enjoying the view.
Strategic Seating: Find the Sweet Spot
Where you sit on the boat dramatically impacts how much motion you feel.
- Go Low and Aft: The bow (front) of the boat might seem fun, but it moves up and down the most as it crashes through the waves. The stern (back) of the boat acts as the pivot point and is the most stable place to sit. Stay as low to the waterline as possible.
- Stay in the Fresh Air: Never go into an enclosed cabin or the marine head (bathroom) if you feel queasy. The lack of a horizon and the smell of exhaust or damp wetsuits will trigger nausea instantly. Stay out on the open deck where the breeze can hit your face.
Keep Your Eyes on the Horizon
Remember the eye/inner ear mismatch? The easiest way to fix it is to look at the horizon. The horizon stays perfectly level, giving your brain a visual reference that matches the rolling motion your body is feeling.
In San Carlos, looking at the horizon is actually a massive bonus. The boat ride to the island is a marine safari! By keeping your head up and scanning the water, you are in the perfect position to spot the massive super-pods of Common Dolphins, a breaching Humpback Whale, or a resident Fin Whale. Turn your seasickness prevention into a wildlife-spotting game.
Fueling Up: The Right Breakfast
A common mistake is skipping breakfast to keep an “empty stomach.” An empty stomach actually sloshes around more and produces excess acid, making you feel worse. However, a massive plate of greasy huevos rancheros isn’t the right move either.
Eat a solid, bland breakfast with complex carbohydrates. Oatmeal, toast, plain bagels, and bananas are excellent choices. They settle the stomach and provide the slow-burning energy you need for a two-tank dive. And above all, stay hydrated. Dehydration massively increases your susceptibility to motion sickness.
What to Do If It Happens Anyway
Sometimes, despite your best efforts, the sea wins. If you feel that inevitable wave of nausea, don’t be embarrassed. It happens to the best of us.
- Go to the Leeward Side: If you need to throw up, tell the divemaster and head to the “leeward” side of the boat (the side the wind is blowing away from). Never vomit into the wind, or it will blow right back onto you and your fellow divers!
- Get in the Water: This sounds counter-intuitive, but the moment the captain gives the “pool is open” signal, get your gear on and get into the water. The rocking motion is happening on the surface. The moment you descend even five feet under the water, the motion stops, the weightlessness takes over, and 99% of the time, the nausea instantly vanishes. The cure for seasickness is diving!
The Sea of Cortez is wild, beautiful, and occasionally bumpy. But with a little preparation, you can leave the seasickness behind and focus on the incredible underwater adventure waiting for you.
Ready to test your sea legs and explore the World’s Aquarium? Book your dive trip with us today—we’ll save a spot for you on the stern!