From Cairns: Green Island Half-Day Morning Cruise
★ 4.1 · 468 reviews
- Four hours, a catamaran to Green Island
- coral gardens and reef fish
- Departs from Cairns
- Free cancellation
Half a day
One listing on this site sells exactly the morning people are looking for: $77 — From Cairns: Green Island Half-Day Morning Cruise, four hours by catamaran with snorkelling over the coral gardens and reef fish, rated 4.1 across 468 reviews. It is also the lowest fare of all 18 listings we compare here apart from the evening cruises, which is why a Green Island half day tour is the first booking most people look at. A second listing, $79, carries full and half day options inside the same booking for five hours and is rated 4.4 across 1,916 reviews. This page compares the two, sets them beside the short reef outings that leave the same city, and says plainly what four hours does and does not fit in. Fares, ratings and lengths come off the live listings and nothing is guessed.

Quick answer
The short answer. Book $77 if you want the cheapest Green Island half day tour on this site: four hours by catamaran, snorkelling over the coral gardens, 4.1 across 468 reviews. Book $79 if you would rather have the choice on the day — five hours, snorkelling or the glass bottom boat, a walk and the pool, 4.4 across 1,916 reviews. And if the island matters less than the water, $126 spends the same four hours on a small-group guided snorkel with a choice of moorings and is rated 4.7 across 1,931 reviews.
What four hours buys
Four hours, one catamaran, one island. The listing is short and so is the day, and that is the appeal: you are back in the city with an afternoon still in front of you.
The crossing is part of the four hours. This is the single most useful thing to understand before booking. A Green Island half day tour is not four hours ashore — it is four hours from the dock and back again, with the island in the middle of it. The listing does not publish a crossing time, so check the departure and return times on the listing page itself.
Snorkelling is the named activity. $77 describes a half-day snorkel adventure by catamaran, with coral gardens and reef fish at the island. That is what the operator says, and we do not dress it up: what the water gives you on any given morning is set by the morning.
The five-hour listing is the flexible one. $79 puts full and half day options in one booking, so the box you tick decides the length of your day. It also names the glass bottom boat, a walk in the rainforest and a drink by the pool, which is a wider day than the morning catamaran sells.
What is not in either listing. No mooring count, no crossing time, no lunch. Where a listing names a meal we say so, and neither of these two does. Bring something, or book a longer day that feeds you.
Every trip, current fare
The two island listings that fit inside half a day, the two short reef outings and the two evening cruises on the inlet. The cost-per-hour column compares hours rather than days: an hour on a guided reef snorkel and an hour on a catamaran to an island are not the same hour.
| Tour | Length | Price | What is included | Cost per hour | Rating |
|---|---|---|---|---|---|
| From Cairns: Green Island Half-Day Morning CruiseDeparts Cairns | 4 h | $77 | A morning catamaran to Green Island and snorkelling over the coral gardens | $19.25 | 4.1 · 468 |
| Cairns: Green Island Full & Half Day Cruise OptionsDeparts Cairns | 5 h | $79 | Green Island with snorkelling or the glass bottom boat, a walk and the pool | $15.80 | 4.4 · 1,916 |
| Cairns: Great Barrier Reef Half-Day Snorkelling TourDeparts Cairns | 4 h | $126 | A small-group guided snorkel with a choice of moorings | $31.50 | 4.7 · 1,931 |
| Cairns: All-Inclusive Great Barrier Reef Half-Day SnorkelingDeparts Cairns | 5 h | $147 | Marine biologist snorkel guides and a selection of 15 exclusive moorings | $29.40 | 4.9 · 626 |
| Cairns: Spirit of Cairns Dinner CruiseDeparts Cairns | 2.5 h | $102 | Dinner on a catamaran along Trinity Inlet as the day turns to night | $40.80 | 4.5 · 423 |
| Cairns: 90-minute Sunset Inlet River CruiseDeparts Cairns | 90 min | $54 | Ninety minutes along the inlet at the end of the day, with a drink on board | $36.00 | 4.6 · 243 |

The two island listings
Two dollars separate the fares and an hour separates the days, so the choice comes down to three things.
1. How fixed the day is. The morning catamaran sells one thing: a four-hour snorkel outing to the island. The five-hour cruise sells options — snorkelling or the glass bottom boat, a walk, the pool — and a full day version of itself. If you are travelling with people who want different things from the same morning, the flexible listing is worth the extra hour.
2. The proof behind each. 468 reviews at 4.1 against 1,916 at 4.4. Both are real numbers with real volume, and the gap is small but consistent. Searches for the best Green Island half day tour land on both listings, and on the evidence the five-hour cruise is the safer of the two.
3. What time you get back. Four hours against five. That sounds trivial until you have an afternoon booked, a flight, or children who are done by two o’clock. This is the whole reason a Cairns half day tour exists as a category: the clock, not the price.
And one thing that does not separate them. Both leave from the city, both go to the same island, and both name the coral gardens. Green Island half day tours Cairns searches produce a long list of names, and the differences between them come down to the hull, the hours and what is on board.
Who each listing suits
Two of them are a Green Island half day tour and four are what the same clock buys elsewhere. The rating and review count in brackets are the live numbers on each listing.
Four hours by catamaran, snorkelling over the coral gardens, 4.1 across 468 reviews, and the lowest fare among the reef and island listings here.
Five hours, 4.4 across 1,916 reviews. Snorkel, take the glass bottom boat, walk in the rainforest, or sit by the pool. Full and half day options in one booking.
Four hours, a small-group guided snorkel with a choice of moorings, 4.7 across 1,931 reviews. No island time, all reef.
Five hours at the outer reef with marine biologist snorkel guides and a selection of 15 exclusive moorings, 4.9 across 626 reviews — the highest rating on this site.
Seven and a half hours at a multi-level pontoon: snorkelling, a glass bottom boat and a waterslide, 4.5 across 403 reviews.
Nine hours on a 16-metre sailing boat with 25 guests, one reef site, time ashore, lunch and refreshments on board, 4.8 across 411 reviews.

Half a day, without the island
If the island is negotiable, the same half day buys something quite different.
A guided snorkel, and nothing else. $126 is four hours with a small-group guided snorkel and a choice of moorings, rated 4.7 across 1,931 reviews — more reviews than any island listing here. You do not get a beach, a pool or a walk. You get the water and a guide in it with you.
The best-rated short day here. $147 runs five hours at the outer reef with marine biologist snorkel guides and a selection of 15 exclusive moorings, and its 4.9 across 626 reviews is the highest score on this site. At $147 it costs about $29.40 an hour, roughly three times the hourly rate of the morning catamaran, and the difference is guides, moorings and what is included on board.
The dry option. Searches for glass bottom boat Cairns half day tours point at $79, where the glass bottom boat is offered instead of snorkelling, and at $200, which carries one at the pontoon on a longer day. For a non-swimmer those two listings are the whole shortlist.
And the evenings. Two listings use the other half of the day entirely: $54 is ninety minutes on the inlet with a drink on board, and $102 is two and a half hours along Trinity Inlet with dinner. Neither goes to the reef, and both pair neatly with a morning that ends at lunchtime.
Read the listing
These are the lines that decide whether four hours is enough, and all of them are on the listing page before you pay.
| What to check | Why it matters |
|---|---|
| Departure and return times | The crossing is inside the four hours. The listing shows the times; we do not publish a crossing figure the operator has not stated. |
| Half day or full day | $79 sells both in one booking, so the option you choose sets the length of your day. |
| Snorkelling or the glass bottom boat | Only the five-hour cruise names both. The morning catamaran names snorkelling over the coral gardens. |
| Whether food is named | Neither island listing names lunch. $147 and the longer reef days are where meals appear. |
| Cancellation terms | Free cancellation is listed on every tour on this site, and the deadline is stated on each listing. |
Book direct
The two island listings first, then the short reef outings, then the two longer days that show what the extra hours buy. Fares, ratings and review counts are live on GetYourGuide, and a Green Island half day tour booked from here costs you the same as booking it anywhere else.
★ 4.1 · 468 reviews
★ 4.4 · 1,916 reviews
★ 4.7 · 1,931 reviews
★ 4.9 · 626 reviews
★ 4.5 · 403 reviews
★ 4.8 · 411 reviews
The verdict
For the lowest fare and the shortest day, book $77. Four hours by catamaran, snorkelling over the coral gardens, 4.1 across 468 reviews. This is the Green Island half day tour most people are searching for.
For one extra hour and far more choice, book $79. Five hours, snorkelling or the glass bottom boat, a walk and the pool, 4.4 across 1,916 reviews.
For the water instead of the island, book $126. Four hours, small-group guided snorkel, a choice of moorings, 4.7 across 1,931 reviews.
For the best-rated half day here, book $147. Five hours at the outer reef, marine biologist guides, 15 exclusive moorings, 4.9 across 626 reviews.
And if the morning turns out to be too short, book $203. Nine hours under sail with 25 guests, lunch on board, 4.8 across 411 reviews.
Four hours is one way to meet the reef. Three listings here give the island a whole day instead, and the differences between them are bigger than the fares.
Compare the full-day island listings→Common questions
$77 — From Cairns: Green Island Half-Day Morning Cruise, four hours by catamaran, 4.1 across 468 reviews. $79 also carries a half day option inside a five-hour booking.
From $77, which is about $19.25 an hour. The five-hour cruise is $79.
It is enough for the crossing, time at the island and a snorkel. It is not enough for a beach afternoon as well. If you want both, the five-hour cruise or a full day is the better fit.
Neither of the two island listings names lunch. Among the short outings, $147 is the one that names what is included on board.
Yes — $79 offers the glass bottom boat as an alternative to snorkelling, and a walk and a pool besides.
$126 is four hours of small-group guided snorkelling with a choice of moorings, and $147 is five hours at the outer reef with marine biologist guides.
$54 is ninety minutes on the inlet and $102 is two and a half hours with dinner. Both are evening listings, so they sit outside a morning on the water.
The notice period is on each listing, and Free cancellation is listed on every tour on this site, so an early booking costs you nothing in flexibility.
Go deeper
All 18 listings side by side: which boats reach the outer edge, and what a full day on the water costs.
CruisingCatamarans, a superyacht, a pontoon and a 16-metre sailing boat — what each hull changes about the day.
In the waterWhat a guided snorkel includes, and which listings carry marine biologist guides.
Fitzroy IslandThe one listing that pairs the island with the Moore Reef pontoon, and what nine hours buys for $200.
Green IslandThree listings, one island: $77, $79 and the sailing boat at $203.
SnorkellingIsland fringing reef, a pontoon, or the outer edge from a boat: three different days, three different fares.