Michaelmas Cay
Best time to dive
June to November
What you might see
- Grey reef sharkLikely
- Manta rayLikely
- NudibranchLikely
- Sea turtleLikely
Sightings are seasonal probabilities, not promises - even in peak season nature does its own thing.
Certification & difficulty
Open Water
Snorkelling
Snorkel-friendly - Yes - one of the GBR's most famous snorkel sites; shallow sandy lagoon protected in most weather, ideal for all abilities
Safety notes
Michaelmas Cay is a National Park (declared 1975) and BirdLife International Important Bird Area - visitor access restricted to a roped-off area (<10% of the cay); do not approach nesting birds/chicks/eggs; stinger suits recommended Nov-May; standard reef etiquette (no touching coral/clams, no feeding fish)
Permits & fees
GBR EMC: AUD $8.00/person full-day visit, $4.00 part-day (current GBRMPA rate, usually included in tour price); no separate diver permit, but National Park roped-area access rules apply on the cay itself
Permits and operators change - confirm before booking.
Location
Nearest hub: Cairns
This profile is desk research, compiled from public sources - not a first-hand dive report. Coordinates are approximate.

