South Coast High School is the school in Australia on the Gold Coast where the four mermaids: Cleo, Emma, Rikki and Bella and their friend Lewis, and most of the other main characters attend.
- Second Year
- Third Year
- Isabella Hartley and Will Benjamin join the school in third year.
- Emma Gilbert and Elliot Gilbert leave the school to travel with their family.
- Lewis leaves school early to finish his studies in America.
- Cleo, Rikki, Bella, and Will graduate.
- Ms. Taylor is the science teacher at the school.
- Ms. Scarf is the physical fitness teacher at the school.
- Mr. Ham was Cleo's biology teacher in the second season.
- The name of the school in real life is Somerset College.
- The school's name appears on Kim's report card on the episode Missed the Boat.
- The school's moto is "Values & Trust."
- The same school was used to film Suncoast High scenes for Mako: Island of Secrets.