Belize · Caribbean
Turneffe Atoll
Spring through early summer is a common favorite for weather and visibility.
Turneffe Atoll is the largest of Belize's three coral atolls and home to the country's best wall diving — long uninterrupted walls, healthy reef fish, the Elbow current point, and a much quieter alternative to Ambergris Caye.
Good season
April–June is calmest with best viz. June–November hurricane risk.
Trip duration
6–7 night liveaboard or Turneffe Flats / Turneffe Island Resort stay.
Dive style
Wall and drift diving; moderate current at the Elbow.
Dive level
Open Water; Advanced for the Elbow.
Reef health
What you’ll actually findThis reef is losing coral faster than it's recovering. If it's on your list, go sooner — and manage expectations on coral colour.
Coral reef health
How is this calculated?On current trend, no live coral by ~2044. Losing about 1.1% cover per year — roughly 20 years of reef left to see if nothing changes.
Heat stress right now
Mild warmth. Worth watching — no bleaching yet.
NOAA Coral Reef Watch · updated May 2026 · 0 °C-week heat dose
What to expect on a dive
Atoll reefs at Turneffe show post-bleaching recovery in patches. Wall diving still strong.
Sources, methodology, and the raw numbers
Raw observed numbers
- Coral cover: 22% (survey Sep 2024, AGRRA reef survey protocol)
- Bleached: 20%
- Recent mortality: 8%
- Caribbean post-2023 — observed condition reflects the declining regional pattern.
Raw thermal numbers
- NOAA CRW alert level: Watch
- Degree Heating Weeks: 0 °C-wk
- SST anomaly: +1.3 °C
How we summarise this
Observed coral cover, bleaching, and mortality come from named in-situ surveys with a stated date and method — they describe one snapshot of one reef and do not extrapolate to neighbouring sites. Current thermal stress is satellite-derived from NOAA Coral Reef Watch at ~5 km resolution; it indicates risk, not observed coral damage. We deliberately separate observed condition, current thermal stress, and projection — and we never publish a projection without a documented model and uncertainty.
Sources
- Atlantic and Gulf Rapid Reef Assessment — AGRRA Program / Perry Institute for Marine Science
- NOAA Coral Reef Watch — U.S. National Oceanic and Atmospheric Administration
- AIMS Long-Term Monitoring Program — Australian Institute of Marine Science
- Global Coral Reef Monitoring Network — GCRMN / ICRI
- NOAA National Coral Reef Monitoring Program — NOAA Coral Reef Conservation Program
- Reef Check — Reef Check Foundation
- NOAA CoastWatch / OceanWatch — NOAA NESDIS / STAR
- Allen Coral Atlas — Arizona State University Center for Global Discovery and Conservation Science
- Great Barrier Reef Marine Park Authority — Australian Government
- International Coral Reef Initiative — ICRI Secretariat
- Reef Life Survey — Reef Life Survey Foundation
- NASA PO.DAAC — NASA Jet Propulsion Laboratory / Caltech
- Copernicus Marine Service — Mercator Ocean International for the European Union
- NASA Ocean Color (OB.DAAC) — NASA Goddard Space Flight Center / Ocean Biology Processing Group
- Argo float network — International Argo Program / UCSD
- CoralWatch — University of Queensland
- IMOS / AODN — Integrated Marine Observing System / Australian Ocean Data Network
- WRI Reefs at Risk Revisited — World Resources Institute
- Ocean Health Index — OHI partnership (Conservation International + UCSB + NCEAS)
- IPCC Special Report on the Ocean and Cryosphere (SROCC) — Intergovernmental Panel on Climate Change
- GOA-ON — Global Ocean Acidification Observing Network — GOA-ON Secretariat + IOC-UNESCO
- HAEDAT — Harmful Algae Event Database — IOC-UNESCO Intergovernmental Panel on Harmful Algal Blooms
- NCEI Marine Microplastics — NOAA National Centers for Environmental Information
Reef condition changes year to year. If you visit, consider supporting responsible-travel and conservation operators on the ground.
Pressure on this reef
Protection · fishing · what you can doProtected-area status
Strict MPAInside a strict marine protected area with active enforcement.
Fishing pressure
Moderate fishing pressureDominant pressures
- sargassum influx
- SCTLD
- tourism overdevelopment
3 Green Fins-verified operators known at this location.
What you can do
Turneffe Atoll Marine Reserve protects most of the atoll. Mesoamerican Reef is partially protected by national parks. Sargassum and SCTLD are the dominant pressures. Support operators participating in coral nurseries.
Protection status sourced from Protected Planet / WDPA and refined with Marine Protection Atlas. Fishing pressure proxy is Global Fishing Watch AIS data. See the methodology for what these sources can and can’t prove.
Dive sites here
2 curated
The Elbow
Southern tip of Turneffe Atoll where two currents converge and pull pelagics in close. Eagle rays in formation, schooling jacks, and the occ…
Black Beauty
Wall dive named for the dense black coral trees draping the deeper section. Visibility consistently tops 30 m and the shallow plateau is loa…
Gear
What to bringSite-specific add-ons
Some dive sites here call for extra gear. Check the individual site page for full context.
- SMB + reel — Drift exit over deep water — SMB required. · The Elbow
- Dive light — Black coral colors pop only under a beam. · Black Beauty
What divers say
“Belize's Blue Hole gets the headlines, but Turneffe is the diving worth flying for.”