Can I wear bug spray?

No. Most cenotes prohibit all chemical repellents, as they are toxic to the fragile groundwater. Wear a long-sleeved swim shirt to protect your skin from both the sun and bugs.

Are there crocodiles in cenotes?

It is extremely rare, but possible in some open-air cenotes near the coast. Always ask the staff at the entrance about the safety of the specific cenote you are visiting.

For basic swimming in tourist-friendly cenotes, no. If you are planning to explore deeper cave systems or dive, you are legally required to hire a certified cave diving guide.

Exploring Yucatán Cenotes Responsibly and Safely

To explore cenotes respectfully, you must shower before entering to remove all sunscreens and insect repellents, and wear a life vest if you are not a strong swimmer. Stick to marked paths and never touch the rock formations or stalactites to preserve the delicate ecosystem.

Remove all chemicals. Most cenotes require a shower before entry. Use biodegradable soap if provided, or simply rinse thoroughly with water to remove sunscreen, bug spray, hair products, and lotions, which can poison the water.
Assess your swimming ability. Cenotes are cold, deep, and often have no shallow areas. Even if you are a strong swimmer, rent a life vest at the entrance if one is offered. Currents in cave systems can be unpredictable.
Practice 'Look, Don't Touch'. The rock formations take thousands of years to grow. Touching them with your hands or fins kills the living minerals and slows growth. Keep your feet off the bottom to avoid stirring up sediment.
Use proper lighting. If you are visiting a semi-open or closed cenote, bring a waterproof headlamp rather than relying on phone lights. Do not use high-intensity flash photography, as it can disrupt the bats and small cave-dwelling species.

Can I wear bug spray?: No. Most cenotes prohibit all chemical repellents, as they are toxic to the fragile groundwater. Wear a long-sleeved swim shirt to protect your skin from both the sun and bugs.
Are there crocodiles in cenotes?: It is extremely rare, but possible in some open-air cenotes near the coast. Always ask the staff at the entrance about the safety of the specific cenote you are visiting.
Do I need a guide?: For basic swimming in tourist-friendly cenotes, no. If you are planning to explore deeper cave systems or dive, you are legally required to hire a certified cave diving guide.