My first snorkel in South America happened in water cold enough to make me breathe faster on entry. I spent that hour off the Chilean coast floating above a kelp forest while a group of Humboldt penguins shot past below me like little silver torpedoes. That single morning rewired how I think about snorkeling on this continent.

The reason sits in the ocean itself. The Humboldt Current sweeps north from the Southern Ocean along the Pacific coast of Chile, Peru, and Ecuador. Cold, nutrient-rich water rises toward the surface in a process called upwelling. All those nutrients feed anchovies, sardines, and the larger animals that hunt them. What they do not feed is a tropical coral reef. The water stays cool, sometimes properly cold, and visibility rises and falls with plankton blooms rather than trade winds.

Travelers usually head for the Caribbean side of South America. I understand why. The warm water and coral there are lovely. But the Pacific side has something the Caribbean cannot easily match: sea lions, penguins, marine iguanas, rays, and schools of fish so thick they dim the water. In the Humboldt Current, the food chain concentrates near the surface. That puts animals usually reserved for scuba divers within reach of a snorkeler. You need a wetsuit and realistic expectations. You do not need a tank.

Galápagos, Ecuador

The Galápagos Islands sit where several currents meet, including a branch of the Humboldt. Water temperatures swing by season, from the low 60s to the mid 70s Fahrenheit depending on the site and month. That is chilly enough to keep coral from taking over, but warm enough for sea lions to haul out on lava rock and for snorkelers to stay in for an hour or more with a proper wetsuit.

The wildlife in the water is unlike anywhere else I have been. Galápagos sea lions are the most social marine mammals I have shared water with. Young ones will barrel toward you, pull up short, and circle around. Galápagos penguins, the only penguin species that breeds at the equator, zip past in bursts. Marine iguanas graze on algae in the shallows and are best watched at a distance. Add whitetip reef sharks resting under ledges and schools of yellowtail surgeonfish, and one morning can cover species that would take three separate dive trips elsewhere.

Most snorkeling access runs through day boats or small-group tours out of Puerto Ayora on Santa Cruz, plus Isabela and San Cristóbal. The sites sit close to shore or just off landing beaches. Park rules are strict, and for good reason. You follow your guide's instructions on entry points and wildlife distance.

Chile's Humboldt Penguin National Reserve

Up the coast in Chile's Coquimbo Region, the Humboldt Penguin National Reserve protects islands where Humboldt penguins outnumber tourists. The snorkeling centerpiece is Isla Damas, a small island reached by boat from the fishing town of Punta de Choros. Water here is the coldest on this list, often in the 50s Fahrenheit. A thick wetsuit is the minimum, not an option.

What you get for the cold is a kelp forest ecosystem that feels closer to Monterey Bay than any tropical postcard. Humboldt penguins nest on the islands and feed in the channels, diving for anchovies in short, efficient bursts. You may see them pass below you, silver bellies flashing. Sea otters, called chungungo locally, work the kelp beds and rocky shorelines. Visibility swings day to day. When it clears, the kelp canopy sways in the current and baitfish move through in sheets. It is quieter, grayer, and more physical than the snorkeling most people sign up for. That is exactly why it stays with you.

Peru's Ballestas and Palomino Islands

Peru gets less snorkeling press than Ecuador or Chile, but the central coast has two accessible options. The Islas Ballestas near Paracas are sometimes called the poor man's Galápagos. The standard trip is a boat tour past sea lion colonies and seabird rookeries, though a few operators run snorkeling excursions when conditions cooperate. The water is cool and visibility can swing with plankton. The sea lions do not seem to mind. They will come to you.

Closer to Lima, the Palomino Islands have become known as the city's sea lion snorkeling trip. The excursion runs about three hours from the Callao port. Water sits in the low to mid 60s for much of the year, so most operators provide wetsuits. The sea lions are close, curious, and numerous. Keep your hands to yourself and follow the briefing. Sea lions are faster than you, and they know it.

Cold water changes your gear

Cold water changes the gear math. A properly fitted wetsuit comes first, whether you rent or bring your own. After that, the mask matters more than most people expect.

A full face snorkel mask covers your whole face, which means less skin in contact with cold water compared to a traditional half mask. That is not a wetsuit replacement, but it makes a real difference during a long session. The Seaview 180° V3 Full Face Snorkel Mask is designed for surface snorkeling, which is all these destinations require. Its patented FlowTech Advanced Breathing System routes fresh air through a side snorkel and is intended to support comfortable breathing at the surface. In third-party testing with Dive Lab, the V3 recorded a Work of Breathing of 0.72 joules per liter, well below the OSHA guideline of under 3.0 joules per liter. Lower breathing resistance matters a little more in cold water, where your body is already spending energy to stay warm. The V3 also includes an integrated camera mount, which I have used to film sea lion passes without fumbling with a separate housing.

Fogging behaves differently in cold water. The gap between your face temperature and the sea can fog a lens fast if airflow does not move across it. The V3 was designed with an airflow path intended to help reduce fog. I pair that with the usual habits: rinse the mask before use, avoid touching the lens, and keep it out of direct sun while it dries.

For extra buoyancy, especially in cooler water and current-prone sites, a snorkel vest helps you float without fighting. The Palawan Snorkel Vest is a flotation aid for swimmers, not a life jacket or life preserver. Use it only if you know how to swim. In cold water, the extra buoyancy also reduces the effort you spend treading while sea lions circle below.

Safety habits for cold water and wildlife

The Humboldt Current rewards preparation. The water is colder, the currents are real, and the animals are wild. A few habits keep the experience on the right side of fun.

• Swim with a buddy. Never snorkel alone, even in a guided group.
• Check your location every 30 seconds. Currents can drift you away from the boat or beach faster than you expect.
• If you feel short of breath, dizzy, or unusually tired, get out of the water. Snorkel safety research out of Hawai'i identified increased exertion and breathing resistance as risk factors for Rapid Onset Pulmonary Edema, a condition where fluid builds up in the lungs. The first symptoms are sudden shortness of breath and fatigue. Remove your mask, signal for help, and exit.
• Give wildlife distance. Sea lions and penguins decide how close they want to be. Chasing them stresses them out and changes their behavior.
• Follow local park rules. The Galápagos and Chile's national reserves have strict guidelines for a reason.
• If you have a heart or lung condition, talk with your doctor before booking a cold-water snorkel trip. Cold water and exertion change how your body works.

What you leave behind

The Humboldt Current is one of the most productive marine ecosystems on Earth. It is also under pressure from overfishing, coastal development, and warming water. Snorkelers get a front-row seat to what is at stake, and that carries a little extra responsibility. Use reef-safe sunscreen where coral exists and biodegradable products where you can. Touch nothing. Take only photos. The few seconds you spend watching a sea lion pup surface for air are worth more than any shell you might pocket.

Seaview 180's giving program, Reef 2 Leaf, supports the Loveland Living Planet Aquarium's Coral Rescue program. That work focuses on the Coral Triangle, thousands of miles from the Humboldt, but the principle is the same. When we experience wild places, we take on a stake in keeping them wild.

Snorkeling in South America gives you two very different options. The cold one is the one most travelers never schedule. The Humboldt Current puts penguins at the equator, sea lions in the surf, and kelp forests within reach of a surface swimmer. Trade turquoise for gray-green water and a wetsuit, and the Pacific coast rewards you with encounters that stick long after the flight home.

Curious about what cold water holds? Check out the Seaview 180° V3 Full Face Snorkel Mask and read how we test it if you want the numbers behind the breathing system. For extra float in current-prone water, the Palawan Snorkel Vest is built for swimmers who want to relax and breathe.