Safety · Destination Guide
Drift the walls, chase winter eagle rays, and meet Cozumel's iconic toadfish
Updated Oct 30, 2025 • 17 sources
Cozumel is well-organized for safe diving with experienced guides, clear procedures, and local hyperbaric support. Respect the marine park rules to protect coral and fish communities.
Most dives are drifts. Agree on entry, depth, and separation plans. Carry and know how to deploy an SMB. Stay neutrally buoyant in swim-throughs and avoid overheads unless trained. Winter winds can force port closures; follow your operator's call.
Cozumel has hyperbaric facilities and private hospitals. International Hospital Cozumel operates an SSS network chamber, and Costamed Cozumel offers 24-hour emergency care. Divers should carry DAN or equivalent coverage and a credit card for deposits.
Port closures from Nortes
Winter cold fronts can close the port to small boats for safety. Keep a buffer day in itineraries.
Strong currents and downcurrents
Advanced northern sites and wall edges may have powerful flows. Stay with your guide and carry an SMB.
Sun and sunscreen restrictions
Regular sunscreen is restricted in the park. Use UPF clothing and apply mineral-only products well before water entry.
Sea lice season
Thimble jelly larvae can cause irritation in late spring. Wear a full rashguard and rinse after swimming.
Follow park rules: no gloves, no touching, no feeding, no fishing or collecting, no anchoring. Use UPF clothing instead of sunscreen. Hire authorized boats and guides only. Report damaged buoys or illegal activity to your operator or park staff.
Do Not Do This
Avoid entering when port closures from nortes. Confirm local briefings before committing.
| Contact | Role | Phone | Availability |
|---|---|---|---|
| General Emergency | 911 | 911 | 24/7 |
| Proteccion Civil Cozumel | Civil protection | +52 987 872 6452 | 24/7 |
| Costamed Cozumel Hospital | Hospital with emergency and hyperbaric access | +52 987 872 9400 | 24/7 |
| International Hospital Cozumel | Hospital with SSS hyperbaric chamber | +52 987 878 6161 | 24/7 |
| Cruz Roja Cozumel | Red Cross | +52 987 872 1058 | 24/7 |