Things to Do on Green Island

Green Island is one of the most popular day trips from Cairns, and for good reason. This small coral cay sits on the Great Barrier Reef just 27 kilometres offshore, roughly 45 minutes by fast catamaran, and packs reef snorkelling, rainforest, a sandy beach, and a range of activities into a single easy day.

Whether you're a first-time visitor to the reef or looking for a relaxed island day with the family, this guide covers everything you can do on Green Island so you can plan your time well.

What Is Green Island?

Green Island is a coral cay, meaning it's built from coral and sand rather than volcanic rock. It's one of around 900 islands on the Great Barrier Reef, and one of only a handful with a rainforest growing on it. The island is small enough to walk around in about 20 minutes, and it sits within a Marine Park zone that protects the surrounding reef.

Visitors choose Green Island because it combines reef snorkelling with a beach, rainforest, and on-island facilities in a single trip, without the longer crossing required to reach outer reef sites. You can compare Green Island packages and other options through our island tours from Cairns page.

Snorkelling on Green Island

Snorkelling is the most popular activity on the island. The reef begins just metres from the beach in shallow, calm water, so you can walk straight from the sand into coral gardens without needing a boat transfer.

Most tour packages include snorkel gear, and flotation aids are available for anyone who wants extra buoyancy. You'll typically see colourful reef fish, coral formations in a variety of shapes, and possibly turtles and giant clams. The best entry points are generally on the jetty side of the island, where the reef is closest to shore.

Visibility varies with tides and weather, but on a clear day the water is excellent for beginners and experienced snorkellers alike. Our snorkelling guide for beginners covers technique and what to expect on the day.

Glass-Bottom Boat and Semi-Submersible Tours

For visitors who prefer to stay dry, glass-bottom boat tours and semi-submersible rides operate from the island throughout the day. You sit in a comfortable, enclosed space and watch the reef pass beneath you, with coral, fish, and other marine life clearly visible through the glass panels.

This is a good option for non-swimmers, families with young children, older visitors, or anyone who prefers not to get in the water. Most packages include either a glass-bottom boat ride or snorkel gear as part of the base fare, and some include both. Our guide to glass-bottom and semi-submersible boat tours explains what to expect.

Intro Diving and Guided Snorkel Tours

If you want a more structured reef experience, intro dives and guided snorkel safaris are available as add-ons on most Green Island tours.

An intro dive requires no certification. You receive a briefing, practise basic skills in shallow water, and then descend to the reef with an instructor. Guided snorkel tours are led by crew who know the reef and can point out marine life you might otherwise miss. Both are typically priced as extras on top of the base tour fare, generally in the range of $80 to $200 depending on the activity and operator.

Rainforest Boardwalk and Island Walks

Green Island is not just about the reef. A short boardwalk runs through the interior of the cay, passing through tropical rainforest that provides a shaded, peaceful contrast to the coastline. The walk takes roughly 15 to 20 minutes and is flat, easy, and suitable for all fitness levels.

Walking the full perimeter of the island takes about 20 minutes and gives you different views of the beach, reef, and surrounding water from each side. Many visitors alternate between snorkelling sessions and a walk to break up the day.

Beach Time and Swimming

Green Island has a sandy beach and a sheltered lagoon area for swimming. It's a pleasant spot to relax between activities, though the beach is compact and can get busy on peak days when multiple tour boats arrive at once.

Sun shelters and loungers are available for hire. Stinger suits are provided during marine stinger season (roughly November to May). If you're visiting during school holidays or peak season, arriving on an early ferry helps you enjoy the beach and reef before the main crowds arrive.

Marineland Melanesia and Other Island Facilities

Marineland Melanesia is a small wildlife attraction on the island, home to crocodiles, sea turtles, tropical fish aquariums, and a collection of Melanesian tribal artefacts. Crocodile feeding shows run twice daily, and you can hold a baby crocodile for a photo. Entry is a separate charge from your tour package.

Beyond Marineland, the island has a restaurant, a gift shop, basic changing and shower facilities, and a swimming pool available to day visitors on some packages. The facilities are modest but cover the essentials for a comfortable day.

Who Does Green Island Suit Best?

Green Island is ideal for families with children, first-time reef visitors, cruise ship passengers with limited time, visitors who want a mix of reef and beach in one trip, and anyone who prefers an accessible, less adventurous reef experience. The short crossing, calm snorkelling conditions, and range of dry activities make it one of the most approachable reef destinations from Cairns.

It may be less suited to experienced divers looking for outer reef coral diversity, or visitors seeking a quieter, less developed island. In those cases, Fitzroy Island is worth considering.

Related reading: Green Island vs Fitzroy Island

Plan Your Green Island Day Trip

Green Island packs reef access, rainforest, a beach, and a solid range of activities into a single easy day trip from Cairns. Whether you spend the day snorkelling, walking the boardwalk, or watching the reef from a glass-bottom boat, there's enough variety to fill a full day without feeling rushed.

Browse island day trips from Cairns to compare Green Island packages and find the right option for your group. Not sure which package suits you best? Our team at the Reef Info Visitor Centre on Abbott Street can help you choose between half-day, full-day, and combo options.