Coral Spawning
Witness one of nature's greatest spectacles — November & December
The Great Barrier Reef's Greatest Show
Once a year, under very specific conditions, the Great Barrier Reef comes alive in a synchronised explosion of life — Coral Spawning.
This extraordinary natural event occurs over just a few nights each year, typically in November or December, following the full moon. Triggered by water temperature, lunar cycles and daylight hours, millions of coral polyps simultaneously release their eggs and sperm into the water column — creating an underwater snowstorm in reverse.
It's one of the most significant reproductive events on the planet, and witnessing it in person is a once-in-a-lifetime experience. The water fills with tiny pink, orange and white bundles drifting toward the surface, while the reef itself seems to glow with life.
Our Coral Spawning Night Dives are carefully timed and planned to give you the best chance of experiencing this phenomenon firsthand — guided by marine biologists who understand the reef's rhythms.
When It Happens
Coral spawning typically occurs 4-6 days after the full moon in November or December, when water temperatures reach 26-27°C. The exact timing varies each year and is closely monitored by our team.
Duration & Timing
The spawning event usually begins around sunset and can last for several hours. Different coral species spawn at different times throughout the night, creating waves of activity across the reef.
What You'll Witness
Coral spawning is unpredictable and awe-inspiring — here's what makes it so special
Underwater Snowstorm
Watch millions of coral gamete bundles rise through the water like an inverted blizzard
Multiple Coral Species
Witness different coral types spawning in succession throughout the night
Marine Biology Insights
Learn about coral reproduction, reef ecology and the science behind this phenomenon from expert guides
Rare Photography
Capture images of an event that only happens once a year and few people ever see
Night Dive Experience
Combine the magic of night diving with the spectacle of mass coral reproduction
Conservation Connection
Understand the importance of reef health and the role spawning plays in reef resilience
Tour Details & Requirements
Important Information
- • Timing is unpredictable: Coral spawning cannot be guaranteed. We monitor conditions closely and provide updates as the event approaches.
- • Short notice bookings: Final confirmation often comes just 24-48 hours before the event
- • Weather dependent: Sea conditions must be suitable for safe night diving
- • Limited availability: These are some of our most sought-after dives each year
Requirements
- • Advanced Open Water certification (or equivalent)
- • Night diving experience recommended
- • Good buoyancy control essential
- • Minimum age: 15 years
Included
- • All dive equipment and torches
- • Marine biologist guide
- • Light refreshments
- • Pre-dive briefing on spawning behaviour
Register Your Interest Early
Due to the unpredictable nature of coral spawning, we maintain a priority contact list. Register your interest in October/November to receive updates and first access to bookings when conditions align.
Register for Coral Spawning Updates
Be among the first to know when conditions are right. Join our priority contact list for the upcoming spawning season.
🪸 Priority Registration Benefits
Registered guests receive real-time updates on spawning predictions, first access to available spots, and detailed pre-dive information about what to expect.