Greg Monks, 38, was last seen in Albufeira during the early hours of Wednesday 28 May while enjoying the first night of a five-day stay.
A major search was launched for the Glasgow man, with his parents and girlfriend flying out to Portugal to also provide assistance.
His sisters, Jillian and Carlyn, previously spoke to Sky News about the family’s devastation.
Speaking to The UK Tonight with Sarah-Jane Mee, Carlyn said: “As a family, we’re worried sick.”
Jillian added: “He deserves to be found, he deserves to be looked for, we need him home.
“He’s a big part of our family, and it’s just unimaginable if he’s just lying somewhere and we can’t find him.”
Local police confirmed on Wednesday that a body had been found in the Cerro de Aguia area where Mr Monks was believed to have been last seen.
A statement by Portuguese police said the body was located on a vacant and uneven lot.
The force added an autopsy will be carried out once the body is removed.
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