How to plan your first Great Barrier Reef trip

Pick your base

Most first-time visitors base themselves in Cairns or Port Douglas in the north, or on one of the Whitsunday Islands further south. Cairns has the widest choice of day trips and an easy airport, and it suits travelers on a budget. Port Douglas, an hour north, is quieter and closer to the outer reef and the Daintree Rainforest. The Whitsundays trade some of that convenience for white sand beaches and sailing between islands.

When to go

The dry season, from May to October, brings clear water, lower humidity and calm seas, which makes it the most reliable time for snorkeling and diving. November to May is warmer and wetter, and it is also the season for marine stingers, so swimmers wear a light full-body suit. Reef trips run all year, but the dry months give you more flexibility if a day is lost to weather.

How many days you need

Plan at least four nights. That allows two days on the water, with a rest day between them, and one day for the rainforest or the tablelands. If you are flying in from India, add a night at the start to recover from the journey before an early boat departure.

Choosing a reef day

Day trips differ more than the brochures suggest. Before you book, check:

• whether the boat visits the outer reef or a closer inner reef site
• how long you spend in the water compared with time spent traveling
• whether there is a semi-submersible or glass-bottom option for non-swimmers
• what is included, such as lunch, wetsuits, guided snorkel tours and introductory dives

Outer reef trips take longer to reach but usually offer clearer water and more coral. Pontoon trips suit families, because there is a stable platform, shade and an underwater viewing area.

Reef-friendly habits

Use reef-safe sunscreen or a long-sleeved rash vest, avoid touching or standing on coral, and keep a respectful distance from turtles and other marine life. Listen to the crew's briefing on currents and entry points, and tell them honestly about your swimming ability so they can pair you with the right guide. A little care keeps the reef healthy for the next visitor.