The prime time to visit the Great Barrier Reef is between May and October when water temperatures are pleasant for swimming, rainfall is low and underwater visibility is high.
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Avoiding stinger seasonWhen you snorkel on the Great Barrier Reef during May to October you will avoid the peak stinger season. This is where box jellyfish and irukandji jellyfish are around. These jellyfish are around all year, they are more common during the warmer months.
Cairns' Great Barrier Reef water temperature varies throughout the year, from a comfortable 29 degrees in summer (December – February) to 22 degrees in winter (June – August).
Swim with manta rays on the Southern Great Barrier ReefSo much so, Lady Elliot Island is referred to as the home of the manta ray. You'll see them throughout the year, but mantas are particularly prevalent in large numbers during the cooler months of May - August.
Take care when diving and snorkellingBe aware of where your fins are and avoid touching anything with them. Don't rest or stand on coral. If you must stand up, make sure it is on sand or use rest stations. Observe animals rather than handling them directly, and avoid blocking the path of free swimming animals.
August is the hottest month in great barrier reef with an average temperature of 16°C (61°F) and the coldest is January at 6°C (43°F) with the most daily sunshine hours at 7 in August.
Getting in the crystal-clear water, you'll see up close and personal just how vibrant the reef truly is. The waters you'll swim in are incredibly safe all year round, and it is extremely rare to experience surf conditions, strong currents, or dangerous animals.
If you're not a confident swimmer, that's ok! We have a number of ways to assist you experience the reef. These include our Snorkelling Safety Officers who's primary focus is to assist you no matter your level of confidence in the water. We have buoyancy vests and flotation aids available.
The best beaches to swim at are mainly in the Northern suburbs. The beaches in the city aren't suitable for swimming due to crocodiles and it being too buddy. However, there is a lagoon to swim in if you're staying in Cairns City.