Region
Australia, New Zealand & East Asia
The Great Barrier Reef and its neighbors, plus Japan's hammerheads and temperate oddities south to the seadragons.
Satellite: NASA Blue Marble
Every dot links to its destination guide.
10 destinations across 4 countries; peak season Mar–Dec.
Seasons
Month by month across Australia, New Zealand & East Asia
Mar–Dec is when most of the region rates highest. Ningaloo Reef holds a 4 or better for 8 months of the year; Cairns & the Ribbon Reefs drops to 2/5 in Feb. All 10 destinations are listed; a destination without verified monthly data says so rather than showing a guess.
Cell color = documented month rating from 1–5. Gray = no verified monthly data.
10 destinations
The destinations
Most dived first. Each guide has the sites, the month table, the marine life and the logistics.
Cairns & the Ribbon Reefs
Australia · 7 sites
Ningaloo Reef
Australia · 5 sites
Coral Sea & Osprey Reef
Australia · 3 sites
Okinawa & the Kerama Islands
Japan · 4 sites
Poor Knights Islands
New Zealand · 5 sites
Townsville & the Yongala
Australia · 4 sites
Green Island
Taiwan · 3 sites
Izu Peninsula
Japan · 4 sites
South Australia
Australia · 4 sites
Yonaguni
Japan · 2 sites