The name Secret Harbour was first used by two local businessmen for a proposed marina development which was to include a small boat harbour, and "Secret Harbour" was gazetted by the then Shire of Rockingham on 6 July 1984. While the idea was scrapped due to the area's large swell, the name was retained when Satterley developed the suburb in the early 1990s.
Satterley has released two new land developments since 2008. These are the Spy Glass Hill development, and the future planned beach front development, including two-to-three-story townhouses, a five-story apartment complex, and a gated community. Satterley is also looking at releasing land in the beach front district for the building of restaurants and cafes.
Furthermore, Satterley also anticipates to open the Secret Harbour Tavern in November 2009, with future commercial expansion to commence shortly after in the near vicinity. These works include the expansion of the shopping centre to accommodate the growing population, with the addition of further specialty stores.
A small shopping centre containing a Woolworths supermarket, as well as specialty and necessity stores provides for immediate shopping needs; the nearest regional shopping centres are Rockingham Shopping Centre and Centro Mandurah, each located about 15 kilometres (9.3 mi) away. A new foreshore village is also being developed in the suburb's west.
The Secret Harbour Golf Course is an 18-hole links course which was designed by Graham Marsh and is rated[who?] as one of the top 25 public access courses in Australia, and is part of the "Golf Coast" group of courses.
At the 2006 census, 5,657 people were resident in Secret Harbour, up from 2,521 at the 2001 census. Of these, 64.27% had been born in Australia, whilst 21.90% were born in the United Kingdom. The median age of the suburb's residents was 30 years, compared to 37 for both the Perth region and Australia generally.
Secret Harbour is rated by the Australian Bureau of Statistics' 2006 SEIFA index as a higher socio-economic area, with an index of 1097 (92nd percentile) for overall relative advantage/disadvantage. This is consistent with the median individual income of $624 per week and the median household income of $1,541 per week, compared to $513 and $1,086 respectively across metropolitan Perth. A much greater percentage of Secret Harbour's residents (22.5%) worked as Technicians and Trades Workers compared to the regional average (16.0%), and the SEIFA data for Education/Occupation placed Secret Harbour in the 67th percentile. Secret Harbour has been described as the FIFO capital of Perth.
Secret Harbour contains two state primary schools: Secret Harbour Primary School, which opened in 1997, and Comet Bay Primary School in the suburb's southeast, which opened in 2007. Additionally, a state high school, Comet Bay College, opened in 2006 and serves students from the entire district.
Typical of many newer suburbs in Perth, Secret Harbour is not safe for either the Labor or Liberal parties at either state or federal level, though recent elections have seen party preferences diverging - preferring Liberal federally and Labor at the state level. Additionally, at the 2001 state election, the booth had 987 valid votes cast, whilst in 2008 it had 2,599 and 2013 3,610 voters.