Set for one of the longest nights of the year " June 18 " the event will give Dr Nahan glimpses into the reality of homelessness experienced by more than 100,000 people every night across Australia.
Dr Nahan said homelessness was a complex issue with no simple solution.
"Though I am cognisant that my experience will only be over one night, I believe it's important that decision-makers fully appreciate the issues they deal with, and I hope this will give me a better understanding of the issue of homelessness," he said.
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READ NOW"I can't imagine what it would be like to know that my child is sleeping rough, and Im very thankful that Im in a position that this is not something I have had to experience myself."
Dr Nahan said the State Government was committed to helping those who were currently homeless as well as preventing those at risk.
"We have invested $560 million into a social housing investment package to provide 1000 dwellings to halve the priority waiting list for seniors and families over two years," he said.
St Vincent de Paul Society chief executive Mark Fitzpatrick said homelessness was on the rise because of increasing rents, utilities and the general cost of living.
"Currently about 10,000 people are experiencing homelessness in WA, and the majority of people experiencing homelessness are under the age of 35 " people in the prime of their life who have become trapped in a cycle of disadvantage," he said.
It is hoped more than $1.2 million will be raised through the sleepout, which will go towards homeless services.
In its 10th year, the sleepout will be held at the WACA Ground.
To register, sponsor or donate, visit www.ceosleepout.org.au.