The Sea FM brand name and original logo was created by Gold Coast Broadcasters Pty Ltd for just the one station - 90.9 Sea FM - after the Gold Coast was granted a new commercial FM licence. 90.9 Sea FM began broadcasting in 1989 with programming consulted by Austereo. The original Sea FM on-air line-up was a strong team of experienced Announcers, many having made their name previously in Metropolitan radio including - Craig Bruce (FOX FM) & Sammy Power, Ian 'Lofty' Fulton (4IP), Grahame "Durry" Rodgers (2SM & 2NX), Sue Moses (2MMM & Channel 10), Gregg Easton (2UW & 4BK), Joe Miller (3XY & EON FM), Dean Miller and Simon Franks.
In November 2011, controversy erupted after rumours surfaced that popular long-term breakfast co-host, Moyra Major, was to be replaced by entertainer Charli Robinson, after Robinson had filled in for six weeks while Major was on maternity leave. It was reported that Major had been replaced due to a significant increase in ratings for the breakfast show during Robinson's stint as co-host.Robinson and her co-host Paul Gale were replaced by Heather Maltman, Dan Anstey and Ben Hannant on the 5th of December 2016.
On December 15 2016 Sea FM Gold Coast became known as Hit 90.9 Sea FM in Southern Cross Austereo’s mass re-branding of its regional radio network. Along with Sea FM Central Coast they were able to retain their heritage name for the moment.