Island Guide · Michaelmas Cay

Michaelmas Cay: The Honest Review

A coral sand cay on the outer reef, 55 km from Cairns. 23 species of nesting seabirds. The only island in the region where the reef around you is genuinely outer reef quality. Here's what makes it different from every other island from Cairns.

Full Day8.5–9 hrs · from $265
Outer Reef55 km north-northeast
Departs 7:30 AMReef Fleet Terminal
Max 36guests · small group
What you're actually getting

Michaelmas Cay: The Outer Reef Island Most People Don't Know About

Michaelmas Cay sits 55 km north-northeast of Cairns, on the outer reef. It's a coral sand cay — a low-lying island formed from accumulated coral sand and rubite — uninhabited, with no resort and no permanent infrastructure. It's also one of Queensland's most important seabird breeding sites: 23 species of seabirds nest here, with thousands of birds visible during breeding season. Walking onto the cay with terns and frigatebirds wheeling overhead is a different experience from stepping off a ferry at Green Island's resort jetty.

Jump to an operator
Best Small GroupSeaStar CruisesFrom $265 adult · $170 child Best Sailing ExperienceOcean SpiritFrom $288 adult · +$4 fuel levy

The key distinction from every other island accessible from Cairns is the reef type. Green Island and Fitzroy Island are inner reef — calmer, shallower, and more accessible, but with the visual limitations of reef that's close to the coast. Michaelmas Cay sits directly on the outer reef, which means better coral cover, stronger fish diversity, and water clarity that inner reef simply cannot match on most days. If you've done a reef tour to Hastings Reef or Moore Reef and want to combine that outer reef quality with an island experience, Michaelmas Cay is the only island option from Cairns that delivers it.

The journey is longer — about 1.5 hours each way rather than 45 minutes — and the price reflects the distance. But for snorkelers who want a meaningful reef experience alongside an island landing, this is the strongest island day trip available from Cairns.

About the cay: Michaelmas Cay is a seabird sanctuary — designated protected habitat for nesting birds. Visitors land on the cay in a designated access zone. The nesting colony is visible but not disturbed. Outside breeding season the bird numbers are lower, but the cay remains a wildlife-rich environment year-round.

Underwater

Snorkeling at Michaelmas Cay: Outer Reef Quality

The snorkeling at Michaelmas Cay is outer reef standard — a significant step up from anything available at Green Island or Fitzroy Island. The outer reef at this location has better coral cover, stronger fish diversity including large reef fish, and water clarity that depends on ocean conditions rather than coastal sediment. On a calm, clear day, Michaelmas Cay offers visibility and marine life quality that competes with the dedicated reef pontoon tours.

SeaStar Cruises has an additional advantage: they visit two separate snorkel locations in one day — Michaelmas Cay and Hastings Reef. Hastings Reef is a dedicated outer reef snorkel site with consistent marine life and healthy coral. Getting two outer reef locations in a single day is an arrangement unique to SeaStar among island tours from Cairns.

Guided snorkel options

Both operators offer guided snorkel options. Ocean Spirit's Marine Biologist Guided Snorkel is available as an add-on ($89 adult, $50 child) — a guided session with a marine biologist who identifies species and navigates to the best sections. Ocean Spirit also runs marine biologist presentations onboard during the crossing — educational content that builds context before you're in the water.

SeaStar includes guided snorkeling on both their locations as part of the tour — their guides take groups through both Michaelmas Cay and Hastings Reef, with species identification throughout.

Sea conditions: Michaelmas Cay is an outer reef location. When the Coral Sea has any swell, you'll feel the 1.5-hour crossing. Check the forecast before you travel, and take motion sickness medication if you're prone — the crossing is longer and more exposed than Green Island or Fitzroy. The extra distance is what puts you on genuinely excellent reef.

Wildlife

The Seabird Sanctuary

23 species of seabirds nest on Michaelmas Cay — making it one of the most significant seabird breeding sites in Queensland. The population includes sooty terns in their thousands during peak nesting season, crested terns, bridled terns, common noddies, silver gulls, frigatebirds, and several shorebird species. The nesting colony is visible from the protected visitor access zone on the cay.

For most reef tour visitors, the seabird colony is an unexpected highlight. The sheer volume of birds visible from the cay — and audible from a significant distance — is unlike anything visible from a pontoon or an inner reef island. Wildlife photographers and birdwatchers consistently rate Michaelmas Cay as one of the most accessible and impressive wildlife sites in the Cairns day-trip range.

Outside the peak nesting season, bird numbers are lower but still significant. The cay is protected year-round, and resident species are present regardless of season. Both operators include time on the cay as part of the tour, with landing in the designated access zone.

Best time for the bird colony: July–September is peak nesting season — sooty terns in their thousands, most active and visually impressive. This coincides with dry season and Cairns peak tourist months, so book earlier than usual. Bring a telephoto lens if you have one: you can't get close to the nesting area, but the numbers make long-range shots exceptional.

Who runs tours here

Michaelmas Cay Tour Operators

Two operators run scheduled day trips to Michaelmas Cay. Both depart from the Reef Fleet Terminal in Cairns and spend approximately 8.5 hours on the water. The differences are meaningful.

SeaStar Cruises Ocean Spirit Cruises
Price$265 adult · $170 child$288 adult · $149 child · +$4 fuel
Group sizeMax 36 passengersLarger (32m catamaran)
LocationsMichaelmas Cay + Hastings ReefMichaelmas Cay
Reef typeOuter reef (both sites)Outer reef
Guided snorkelIncluded (both sites)Add-on $89
Semi-submarineNo (glassbottom boat)Yes — included
Marine biologistONBEKENDYes — onboard presentations
Sparkling wine returnNoYes — included
Departure7:30am[ONBEKEND — te verifiëren]
EMC includedONBEKENDYes ($8.50 included)
Intro diving$95 (first dive) · $55 (second)$174 (min. 12 yrs)
SeaStar Cruises Michaelmas Cay Best Small Group
SeaStar Cruises

Michaelmas Cay + Hastings Reef — Max 36 Guests

From $265 adult · $170 child ★★★★★ 4.8/5

SeaStar runs the more intimate tour to Michaelmas Cay — capped at 36 guests and stopping at two locations: Michaelmas Cay and Hastings Reef. Departs 7:30am, returns ~4:15pm. Every inclusion is covered: buffet lunch, morning and afternoon tea, snorkel gear, wetsuits, vests, a glass-bottom boat tour and guided snorkel at both locations.

✓ Max 36 guests — small group feel
✓ Visits both Michaelmas Cay AND Hastings Reef
✓ Guided snorkel tours at both locations
✓ Buffet lunch, morning tea, afternoon tea included
✓ Snorkel gear + wetsuits + vests included
⏱ Departs 7:30am · returns ~4:15pm 📍 Reef Fleet Terminal
Optional: Intro diving $95 (1st dive), $55 (2nd dive) · Certified diving $75 (1 dive), $130 (2 dives) · Hotel transfers from $30
Read Our Review →
Ocean Spirit Cruises Michaelmas Cay Best Sailing Experience
Ocean Spirit Cruises

Michaelmas Cay Full Day — 32m Sailing Catamaran

From $288 adult · $149 child ★★★★★ 4.6/5

Ocean Spirit runs to Michaelmas Cay aboard a 32-metre sailing catamaran — a larger vessel with more guest capacity than SeaStar, but still well-equipped. The price includes EMC ($8.50), and the experience includes a semi-submarine, marine biologist presentations, fish feeding, and sparkling wine on the return journey. Prices valid April 2026–March 2027.

✓ 32m sailing catamaran
✓ Semi-sub + marine biologist presentations
✓ Buffet lunch + sparkling wine on return
✓ EMC ($8.50) already included in price
$288 + $4 fuel levy Family: $734 📍 Departs Reef Fleet Terminal
Optional: Marine Bio Guided Snorkel $89 adult · Intro Scuba $174 (min. 12 years)
Read Our Review →
From people who've been

Insider Tips for Michaelmas Cay

Honest assessment

Is Michaelmas Cay Worth It?

For snorkelers who want outer reef quality and a genuine island landing experience, yes — Michaelmas Cay is the best option available from Cairns. It's not the cheapest island, and the longer crossing is a real consideration if you're prone to motion sickness. But the reef quality, the seabird sanctuary, and the "outer reef island" experience is something none of the closer islands can match.

Go if you are…

  • A snorkeler wanting genuine outer reef quality
  • A birdwatcher or wildlife photographer
  • A couple wanting a premium sailing day (Ocean Spirit)
  • Someone who's done Green Island and wants more
  • A diver — both operators have diving add-ons
  • After the most unique island experience from Cairns

Skip it if you are…

  • Prone to sea sickness — the 1.5hr outer reef crossing is real
  • On a tight budget — cheapest option is $265 before transfers
  • Travelling with young children who aren't strong snorkelers
  • After a beach-focused relaxation day (no overnight, minimal shore)
  • Booking in rough sea conditions — outer reef is exposed

Green Island is better for non-swimmers, families with young children, and anyone who wants an accessible, resort-style day. Fitzroy Island is better for active travellers at a lower price. Frankland Islands is the best snorkeling option if uncrowded fringing reef is the priority and you can spare a full 8.5-hour day.

Before you go

Getting There & Practical Info

Getting to Michaelmas Cay

Both operators depart from the Reef Fleet Terminal at 1 Spence Street, Cairns. SeaStar departs at 7:30am. Ocean Spirit's exact departure time is listed on their booking page — confirm when booking. The crossing takes approximately 1.5 hours in each direction.

What to bring

Reef-safe sunscreen (essential — you'll be on the water for approximately 8.5 hours), a rash vest or stinger suit November through May, motion sickness medication if you're prone (the outer reef crossing is longer than Green Island or Fitzroy), your own snorkel gear if you have it, and a camera — the seabird colony is genuinely photograph-worthy.

Best time to visit

June to September is dry season — calmest sea conditions, best visibility. This is also when the nesting seabird colony is most active (peak nesting season). July and August have the highest visitor numbers. The wet season (November–April) brings more variable sea conditions and the outer reef crossing can be rougher, but underwater visibility can still be excellent in calm spells.

Is it suitable for families?

Both operators welcome families. Ocean Spirit's family price is $734 (two adults, two children), and the semi-submarine makes the trip accessible for non-swimming family members. SeaStar's $170 child price and max 36 cap make it the better small-group option for families who want guided snorkeling. For families with very young children who aren't confident swimmers, discuss the tour structure with operators before booking.

Also considering?

Best Overall Green Island From $112 · 45 min · 3 operators Best Active Escape Fitzroy Island From $108 · 45 min · 2 operators Best Snorkeling Frankland Islands From $195 · full day · 1 operator
Common questions

Michaelmas Cay FAQ

The reef type is the key difference. Green Island is inner reef — calmer and more accessible, but with the limited coral cover of a reef that's 27 km from the coast and sees significant tourist traffic. Michaelmas Cay sits on the outer reef, 55 km offshore — better coral, stronger fish diversity, clearer water in good conditions. The seabird colony is also completely unique: 23 nesting species visible on the cay, which Green Island doesn't have. The tradeoff is a longer, more expensive journey and more exposure to sea conditions.
SeaStar if you prioritise snorkeling — max 36 passengers, two reef locations (Michaelmas Cay + Hastings Reef), and guided snorkeling included at both. Ocean Spirit if you want a premium full-day experience — a 32m sailing catamaran, semi-submarine, marine biologist presentations, buffet lunch, morning and afternoon tea, and sparkling wine on the return. Ocean Spirit costs more ($288 vs $265), but includes significantly more.
It depends on conditions. The 55 km outer reef crossing is more exposed than Green Island (27 km) or Fitzroy Island (29 km). On calm days it's a comfortable ride. When there's any offshore swell, you'll feel it for 1.5 hours each way. If you're prone to motion sickness, take medication before boarding — the crossing is long enough to affect people who are borderline. Both operators can advise on forecast conditions if you call ahead.
23 nesting species, with the most visible being sooty terns (thousands during peak season), crested terns, bridled terns, common noddies, and great frigatebirds. Shorebirds including ruddy turnstones and other migratory waders use the cay as a staging point. The nesting colony is most active and spectacular July through September — peak breeding season aligns with the Cairns dry season and peak tourist months.
Yes — both operators include time on the cay. There is a designated visitor access zone that protects the nesting colony while allowing visitors to experience the island environment. You cannot walk freely into the nesting area, but the colony is visible and the experience of being on the cay with thousands of seabirds is the point. The cay itself is a sand and coral rubble island — no facilities, no resort.
Yes, through both operators. SeaStar offers intro diving (first dive $95, second $55) and certified diving ($75 one dive, $130 two dives) — notably cheaper than Ocean Spirit's intro dive at $174. If diving is the goal, SeaStar is the better value for the underwater experience. Minimum age for intro diving varies — confirm with the operator when booking.
Both tours are approximately 8.5 hours total. SeaStar departs at 7:30am and returns around 4:15pm. You spend approximately 4 hours at the reef and cay locations combined. The longer journey time compared to Green Island or Fitzroy is a direct result of going further out to the outer reef — and it's what delivers the better snorkeling conditions.
They serve different purposes. Michaelmas Cay is outer reef — better coral diversity, stronger fish populations, and exceptional seabird wildlife. Frankland Islands is fringing reef around uninhabited national park islands — the advantage is the sole operator exclusivity (no other tour groups on the reef at all). For pure snorkeling quality, Michaelmas Cay's outer reef location gives it the edge. For uncrowded, pristine fringing reef with a unique expedition-style journey, the Frankland Islands win on exclusivity.