The best time to see Great Barrier Reef Coral Spawning in 2026 is November to December 2026.
Timing status: Forecast window.
Mass spawning · November to December 2026
Annual · after the November full moon
Days after the November full moon, the entire reef releases its eggs at once in an underwater blizzard.
On a few synchronized nights after the late-spring full moon, corals across the Great Barrier Reef release trillions of eggs and sperm bundles at once, an underwater snowstorm that seeds the next generation. The exact night hinges on water temperature and the moon.
the whole reef spawns at once: A few nights
Where it is visible: Great Barrier Reef, Australia
Timing is predicted only weeks ahead, keyed to the November full moon and water temperature.
Great Barrier Reef Coral Spawning 2026: November to December 2026.
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