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Hotels, dive operators, gear, and how to get here are on the Cozumel location page.
Overview
Punta Sur's signature swim-through system — a near-vertical chimney that drops from 27 m and exits into open water on the wall at 40 m. Tight, dark, and unforgiving of buoyancy errors. A bucket-list dive for advanced Cozumel regulars.
Briefing note
Advanced certification + minimum 50 logged dives required by most operators.
What you'll see
3 species curated- rareCaribbean reef shark
- year-roundGreen moray eel
- year-roundNassau grouper
Sightings evidence
1 record on file- low confidenceCaribbean reef shark
- Last confirmed
- May 2026
- Recent records
- 8 within 10 km
Sources & methodology
How we summarise this
We aggregate confirmed occurrence records from GBIF and OBIS within a fixed radius of each dive site. Occurrence records confirm presence and reveal seasonality clustering, but they DO NOT measure per-dive probability — there is no eligible-effort denominator. We deliberately do not publish a numeric '% chance of sighting' from this data.
Sources
- Global Biodiversity Information Facility — GBIF Secretariat
- Ocean Biodiversity Information System — IOC-UNESCO
- iNaturalist — California Academy of Sciences & National Geographic Society
- IUCN Red List of Threatened Species — International Union for Conservation of Nature
- Wildbook (Sharkbook, Whale Shark, Manta Matcher) — Wild Me
- OBIS-SEAMAP — Duke University Marine Geospatial Ecology Lab / OBIS
- WoRMS — World Register of Marine Species — Flanders Marine Institute (VLIZ)
- FishBase — FishBase Consortium
- Atlas of Living Australia — CSIRO / GBIF Australia
- REEF Volunteer Fish Survey — Reef Environmental Education Foundation
Conditions
| Month | Water | Visibility | Current |
|---|---|---|---|
| Jan | 25–26 °C | 25–40 m | moderate |
| Feb | 25–26 °C | 25–40 m | moderate |
| Mar | 26–27 °C | 25–40 m | moderate |
| Apr | 26–27 °C | 25–40 m | moderate |
| May | 27–28 °C | 25–40 m | moderate |
| Jun | 28–29 °C | 20–35 m | moderate |
| Jul | 28–29 °C | 20–35 m | moderate |
| Aug | 28–29 °C | 20–35 m | moderate |
| Sep | 28–29 °C | 15–30 m | moderate |
| Oct | 27–28 °C | 15–30 m | moderate |
| Nov | 26–27 °C | 20–35 m | moderate |
| Dec | 25–26 °C | 25–40 m | moderate |
Season calendar
Peak season highlighted · current month outlined
Gear for this site
Beyond the basic kit- Dive light — Chimney is dark in the middle section even with surface light overhead.
- Dive computer — Deep profile with no-deco margins that need watching.
Next step
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