When to Go

When to Go

The majority of Barrier Reef islands lie north of the tropic of Capricorn and have a distinctly monsoonal climate. In Australian summer (roughly December-February), expect tropical downpours that can limit outdoor activities and mar underwater visibility for days. The islands are warm even in winter; it's hot during summer months—and the farther north you go, the hotter it gets. The water temperature is mild to cool, varying only by a few degrees between winter and summer. Regardless of water tempeture, tour operators will often recommend that you wear at least a "shortie" wet suit to help keep you buoyant, a Lycra suit to protect you against unexpected stings from coral while you're exploring, and in some cases, a full-body stinger suit for protection against box jellyfish tentacles. The warm days, clear skies, and balmy nights of the "dry" season, especially winter (June-August) are ideal for traveling around and above Cairns. If you choose an island on the southern end of the chain, keep in mind that some winter days may be too cool for swimming.