A Sydney couple has woken in the middle of the night to find a naked Irishman in bed with them at their home in Maroubra.

Katie woke shortly before 2am to find a man she did not know in bed with her and her partner Chris.

Katie got out of bed and woke Chris, who challenged the man.

Police were called to the home after residents allegedly found a naked man in their house. (9NEWS)

"So Chris is on one side, I'm in the middle, and then our stranger on the end right in with us," Katie said.

"I could feel heat, the sense that someone was there.

"That's kind of the scary part, how long he may have been looking at us thinking it's a good idea to get into bed with these guys."

Police take the man from the scene in Sackville Street. (9NEWS)

The intruder then picked up his clothes and walked outside to the backyard as Katie called the police.

As the couple waited for police to arrive, the man climbed back into the house through a kitchen window and wandered around the home.

Police arrived at the Sackville Street house and placed the 25-year-old in the back of the police vehicle where he began to convulse due to what paramedics believe could be drug-related health issues.

The house that the man allegedly broke into. (9NEWS)

He was taken to Prince Of Wales Hospital and will undergo medical and mental health checks.