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Walk on the sea floor of the UNESCO-listed Great Barrier Reef with a Seawalker Helmet Dive. An expert guide accompanies you into the water while your head stays dry throughout this one-of-a-kind underwater experience. You'll ride a luxury catamaran to Green Island on this day trip from Cairns, and have the option to take a glass-bottom boat cruise, a guided rainforest walk, snorkel from the beach and enjoy an optional buffet lunch on board.


  • Great Barrier Reef and Green Island day-trip from Cairns
  • See the world’s most extensive coral reef ecosystem: the UNESCO World Heritage-listed Great Barrier Reef
  • Walk along the sea floor during a Seawalker Helmet Dive and watch vibrant marine life around you, no experience needed
  • Choose from a variety of activities including a glass-bottom boat tour, snorkeling and rainforest walks
  • Have the option of a buffet lunch on the luxurious catamaran that transports you to Green Island

Recent Photos of This Tour

What You Can Expect

Green Island Day Trip from Cairns Including Seawalker Helmet Dive

Green Island

Check in at the centrally located Reef Fleet Terminal in the morning to confirm the time of your Seawalker Helmet Dive. Then board a high-speed catamaran for Green Island, located just 15 nautical miles (27 km) offshore from Cairns.
The coral cay of Green Island, covered by lush rainforest and sandy white beaches, comprises both a national park and marine park and is part of the Great Barrier Reef World Heritage Area — home to sea anemones, stingrays, giant clams, and green and hawksbill sea turtles.
Morning tea or coffee is served on board, while beverages are available for purchase all day from the licensed bar (own expense). In the afternoon, enjoy a buffet lunch, if option selected.
On arrival, your crew provides snorkeling instruction and suggests a variety of included activities in addition to the Seawalker Helmet Dive. You can take a glass-bottom boat tour, snorkeling tour or a guided rainforest walk.
At your allotted time, your guide accompanies you on the 45- to 60-minute Seawalker Helmet Dive — perfect for non-swimmers or anyone who might not be confident in the water. Your head stays dry in the helmet, allowing you to wear glasses or contacts and keep your hair dry. Suit up and get comfortable with the provided equipment, then take a walk on the sea floor of the Great Barrier Reef for a close-up look at vibrantly colored fish and coral.
Back on dry land, make use of the shower, restrooms and changing room facilities at the Green Island Resort. Canoes, sailboards, surf skis, beach chair and umbrellas are also available to rent before you’re returned to Cairns at the end of the day.

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Customer Reviews

Kathy Kris Canada

5 star rating: Highly Recommended December 2016

The experience was amazing, just wish it was for a little longer. The operators worked like clockwork, very well organised and professional. Crew members under water were FANTASTIC! THANK YOU for making me feel safe!!!
For me and my husband 58 and 59 this was the experience of a lifetime!!!
- - - Only down side is the price of the photos on a USB stick - 160 - ridiculously expensive!!!

Tracey D

5 star rating: Highly Recommended May 2016

This was the most awesome experience ever, it beats swimming with the dolphins. And being a Jon-swimmer, perfect for me. The guides were really good and we were that close to the fish, we could touch them.

Eugene H

5 star rating: Highly Recommended June 2015


Fred J USA

5 star rating: Highly Recommended April 2015

Outstanding experience!


5 star rating: Highly Recommended January 2015

This was the experience of a lifetime! I am not fond of the water and rarely swim, so this helmet dive was perfect for me! I didn't even get my hair wet! They put this heavy helmet on my head, but when I was under the water, it wasn't heavy at all! There were fish all around me and I even got photo bombed by the resident Parrotfish! It was perfect!!!

Charlhen T

5 star rating: Highly Recommended December 2014

Great Great experience!Amazing nature and a must visit place!

Navanga W Australia

4 star rating: Recommended August 2016

Green island is a small but beautiful island, you can snorkel off the beach on your own. I chose the glass bottom boat option which was a bit disappointing as it lasted only about 20 minutes. However, the seawalker - where you can walk on the ocean floor was just amazing.

Melanie P

4 star rating: Recommended June 2016

The experience was amazing, just wish it was for a little longer, could walk a bit further around and some photos whilst walking would have been good too. The operators worked like clockwork, very well organised and professional. Only down side is the price of the photos on a USB stick - ridiculously expensive!!

Antony K

4 star rating: Recommended November 2015

Somewhat disorganised on the boat, received different messages from different staff. We ended up having our helmet at the same time as lunch was being served so we didn't get lunch, we also found out later that we were booked in for our glass bottom tour at the same time so we missed this as it's difficult to be in 3 places at the same time! We were reluctantly given permission of go on a later glass bottom boat by an indignant member of staff, we were made to feel that it was our fault for not attending at the initial time that we weren't told about. On the up side the staff doing the helmet dive were extremely conscientious and attentive, we thoroughly enjoyed the experience.

Joan W

4 star rating: Recommended November 2015

This trip provided lots of options. Enjoyed snorkeling. Was disappointed in the helmet dive - while it was a great experience for my friend who had not done it before and was a great opportunity to see fish up close, it provided no opportunity to view coral. I recall seeing much coral up close when I did a similar activity back in 1988. Glass bottom boat was good opportunity to see variety of fish and coral. Lunch was rushed with the long lineup and the booked commitments. Overall still a very good experience

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