Theo Hayez's family are desperate to find the 18-year-old

Authorities have moved their search for missing Belgian Backpacker Theo Hayez to bushland near the Byron Bay Lighthouse.

Specialist police will join the search today, as SES volunteers, officers and community members move their focus to an area between The Pass and Wategos Beach.

Theo Hayez, 18, was last seen leaving the holiday town’s Cheeky Monkey’s bar about 11pm on May 31.

His distraught father Laurent made an emotional plea for help on Monday, begging encrypted chat service WhatsApp to grant police access to his son’s final conversations.

The company has provided what information they can but are unable to access the content of the messages.

Unfortunately, Tuesday’s efforts came to an end with nothing of interest found

Police are continuing to appeal for assistance from the public; anyone with CCTV from surrounding areas from about 11pm on May 31, or anyone with dashcam footage from Jonson or Tennyson streets is urged to come forward.