Check out Scarborough Beach! A must when visiting Perth.
Scarborough Beach has crystal clear blue waters and fine white sand. Unlike many popular beaches, there is a good and affordable Fish&Chip shop directly opposite the beach.
So grab a cheap bite to eat and have the classic 'Fish&Chips' in the beach.
Scarborough has plenty of parking, though it does get crowded. Bring a lot of shade and water as 1. You wont want to leave and 2. You are in Perth after all.
As the water is soo clear, you wont want to visit without diving in. Bring your swimmers and much needed sunblock. There isnt many beaches as beautiful as this one. You can actually see a few coral reefs.