The Sun is very strong in Australia. There are signs and posters on buses and buildings warning about the high skin cancer rate in Australia. Fortunately Liz always wears sunblock and brings plenty of it. She made sure I wore sunblock 70 and stayed protected. After all of our walking and relaxing in the sun, neither of us got a sunburn.
There are high waves some days so watch out! Maybe the waves are not the most dangerous, but all the surf boards flying around in the water is! (I met a girl who'd got her teeth knocked out!)
The water has some strong currents and a rip tide is always possible. Be careful when swimming especially if you are alone. There are life guards on the beach but they can't keep an eye on everyone so be proactive in your personal safety.