SS Yongala Wreck in November

April through October delivers the best conditions. Water temps sit around 22-26°C, visibility often exceeds 25 meters, and the southeast trade winds stay manageable. July and August are peak season for good reason. The water's clearest, currents more predictable, and you'll dodge both stinger season and cyclone season. Book dive trips well ahead - spots fill up fast. Avoid November through March unless you enjoy diving in washing machine conditions. Cyclone season brings unpredictable weather, reduced visibility, and dangerous marine stingers. Many operators shut down entirely during the worst months. Weekdays offer better value and smaller groups. Weekend warrior divers pack the boats, driving up prices and reducing bottom time.