Australia is known as the world's premier surfing destination.
It'd be the perfect location to see this as a new hobby skill to learn in the game.
Surfing and Windsurfing.
Surfboard art.
A surfer van decor item. It'd be funny if it could be an on-site "tent" that your Sim could sleep in.
Outdoor showers.
Night surfing.
Waxing surfboard.
Posing with it.
Relax float on it in the water.
There could be a beach Community Board that informs of current surfing conditions:
- Jellyfish swarm
- Sharks spotted
- Wind conditions
Could even add a snorkeling buoy that only activates with Island Living, but is otherwise decorative.