Carolina Souza Mendelblatt (née Borges, born 25 May 1979 in Rio de Janeiro) is a Brazilian-born Portuguese windsurfer, who specialized in Mistral and Neil Pryde RS:X classes.

She graduated with a BA (Hons)at Ravensbourne College of Design and Communication and worked as a broadcaster in London, U.K.[1][2] She represented Brazil at the 2004 Summer Olympics, and had been training with the Rio de Janeiro Yacht Club (Portuguese: Iate Clube do Rio de Janeiro) for most of her career before joining the Portuguese squad in 2012.

Mendelblatt made her official debut as a member of the Brazilian squad at the 2004 Summer Olympics in Athens, where she placed twenty-fifth in women's Mistral sailboard with an accumulated net score of 229, edging out Puerto Rico's Karla Barrera by a vast, 31-point gap.

[3] Eight years after competing in her last Olympics, Mendelblatt joined the Portuguese squad to compete for the second time in the RS:X class at the 2012 Summer Olympics in London by receiving a berth from the World Championships in Cadiz, Spain.

[4] Mendelblatt withdrew from the Games before the event had officially started, claiming that she lacked the support of the Portuguese mission and that she was three months pregnant.