Is an overnight sailing trip worth it?+
It's the best way to see the area. A two-day sailing trip from around 500 AUD includes meals, an overnight stay and snorkeling gear, and crucially gets you to Whitehaven Beach early in the morning or late in the afternoon, when the day-trip boats aren't there. Options range from backpacker sailing boats to small luxury catamarans.
When are jellyfish in the water?+
From November to May, peaking December to March. The culprits are box jellyfish and Irukandji jellyfish, whose sting can be fatal. During that period, swimming is done only in a full-body stinger suit, which every boat provides, or in the netted, patrolled lagoon in Airlie Beach. The risk is much lower out at the outer reef than near the coast, but suits are worn there too.
Airlie Beach or Hamilton Island?+
Airlie Beach is cheaper, has more restaurants, and every boat departs from here, making it the more practical base. Hamilton Island is more comfortable, with its own airport and beaches right by the accommodation, but everything costs more and evening options are limited. A common approach is to spend most of the trip in Airlie and add two nights on Hamilton.
Can you see Heart Reef from a boat?+
No. The formation is protected, so swimming or diving there is banned, and it can't be made out from the water's surface. The only way to see it is a scenic flight by plane or helicopter from Airlie Beach or Hamilton, taking about an hour and costing from 300 AUD. Some flights combine the flyover with a landing on a sandbar in the middle of the reef.
Is the coral around the islands damaged?+
The reef around the islands was hit by bleaching and by Cyclone Debbie in 2017 and is visibly poorer than it once was. The outer reef near Hardy and Bait Reef, 60 kilometers offshore, is in significantly better condition, and it's worth paying for a full-day trip out there if you're after coral rather than just beaches.
Do you need a visa for Australia?+
Yes. Citizens of many countries, including the Czech Republic, apply online for an eVisitor (subclass 651), which is free, usually processed within a few days, and valid for a year with stays of up to three months. Apply through the Australian Department of Home Affairs portal or the ImmiAccount app. Without an approved visa you won't be allowed to board the flight.
When can you see whales?+
Humpback whales migrate through the channels between the islands from July to September, arriving from Antarctica to calve. Whitsundays is one of the few places where you can spot them routinely even from an ordinary day-trip boat, no special outing required. August and September are best, coinciding with the most pleasant weather.
How many days are enough for the Whitsundays?+
Four to five days. In that time you can fit in Whitehaven Beach, a full-day trip to the outer reef, a day on the mainland in Conway National Park, and possibly a scenic flight over Heart Reef. Since the journey from Europe takes over a day each way, though, this usually gets tacked onto a longer loop around Australia's east coast.