Cairns Great Barrier Reef

2019 Coral Spawning Night Dive & Snorkel

Once a year only, for a few nights in late spring or early summer, the Great Barrier Reef turns on a spectacular and sexy festival. On these nights many corals spawn in a mass synchronised event. This is a phenomenon unlike anything else in the animal kingdom, and it happens right here on the Great Barrier Reef! Tusa 6 provides fun and informative trips for certified divers and snorkellers to watch this unmissable event take place, and you can get involved!

When will coral spawning happen?

Linked to the phases of the moon, the most common timing for coral spawning on the Great Barrier Reef is 3-5 days after the full moon in late spring or early summer. There are many factors involved including minimal tidal movement, water temperature and light. Although there are no guarantees of the exact nights of the coral spawning, experts can usually predict the spawning about two months in advance.

2019 Coral Spawning Expeditions

The 2019 Great Barrier Reef coral spawning event is predicted to occur between 15-18 November. Join us for a special nighttime dive and snorkel trip from Cairns to see it for yourself!

BOOK NOW for 17 November

BOOK NOW for 18 November

Spaces are limited, so get in quick!


What is coral spawning?

Hard corals reproduce just once a year by releasing huge clouds of eggs and sperm into the water in an amazing synchronised display. Imagine snorkelling or diving and seeing billions of colourful confetti-like objects filling the ocean around you in a whirling, eddying underwater snowstorm. This is an unforgettable and unmissable experience!


  • 2 Cert dives with full gear hire – $270 per person
  • 2 Cert dives with tanks & weights – $240 per person
  • Snorkel only – $220 Adults, $150 Children


  • 2 certified dives or 2 snorkel sessions
  • Free guided snorkel tour
  • Torches (incl for full gear cert and snorkel)
  • Glow sticks
  • Dive computers
  • Wetsuits
  • Hot buffet dinner
  • Tea, coffee & hot soup
  • Reef Levy


  • Guided dives $15.00 per dive
  • Torch hire $10.00
  • Tanks & weights

Want to join in?

Book using the links above, call Tusa Dive Reservations on 4047 9100 or email

Full payment is required at time of booking. No refunds for cancellations within 24 hours.
Special offers, discounts, and day trip vouchers are not available for Coral Spawning tours.
Hotel pickups and Nitrox fills are not available for Coral Spawning.
Tusa Dive does not guarantee you will see the Coral Spawn. The coral may spawn on one or several nights, however it is impossible to predict.

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