Scuba Season
Underwater reef at Cozumel
Declining

Cozumel

Mexico · Caribbean

A 48km-long limestone island off the Yucatán, Cozumel is the easiest first class drift diving in the western hemisphere: clear blue water pushed north along a chain of cuts, swim throughs, and coral spurs that bottom out at 20–40m. Big eagle ray and turtle traffic, splendid toadfish on the sand, and a reef that has bounced back well from past bleaching.

How this reef is doing

How we measure this

Reef state

Declining

Less hard coral than the photos. Fish life, sponges, and the wall topography are still excellent. Best at depth (>20 m) and on the cooler shoulder months (Dec–Mar).

Coral cover

21%
LowHealthy
Moderate

Fish life

Not surveyed

Heat

SafeBleaching

Warmer than usual right now, but not hot enough to bleach.

Warming

Fishing

QuietBusy

Quiet water, and the protection is actively patrolled.

Patrolled

Sources · MERMAID and partner coral surveys · NOAA Coral Reef Watch · Global Fishing Watch and reef gravity

What you will see

21 species across the dive sites here

Dive sites

What divers say

I learned to dive in Cozumel and now I judge every drift dive against it. Most lose.
Divemaster, returning guest

Good to know

Marine park fee

~$5/day, usually collected by your op. Keep your wristband.

Hurricane season

August–October peak risk; trip insurance with weather coverage is sensible.

Gear & getting wet

  • Basic kit

    • Mask and fins
    • BCD and regulator
    • 3mm full wetsuit · warm water
    • Dive computer
  • For specific sites

    • Surface marker buoy · Palancar Reef
    • SMB + reel · Santa Rosa Wall
    • Dive computer · Santa Rosa Wall
    • Dive light · Devil's Throat