Grieving family and friends have been left in the dark after a Sydney man was found dead in Thailand.

Robert Wojcik had been living and working on the Thai island of Ko Pu when he took his boat out on June 1.

Concerned family and friends raised the alarm a day later when he didn’t return.

His body was discovered the following day.

The Department of Foreign Affairs released a statement saying it was working with his family.

“DFAT is providing consular assistance to the family of an Australian who recently died in Thailand,” the department said.

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The keys to the boat were still in the ignition and his wallet and backpack were on-board, according to a post shared on a Facebook page for expats in nearby Phuket.

The only item missing was his iPad which he used to talk with family in Australia while living overseas.

It's believed the last contact he had before disappearing was with his father at 9.30pm on the night he vanished.

As the desperate search continued, authorities eventually uncovered his body.