The 42-year-old supermodel looked stunning in the strappy suit, which she paired with large gold earrings and black sunglasses, and wore her wet hair down.
The swimsuit was from her very own company, GAL Floripa.
He was on the beach in her native Brazil, where she was celebrating the holidays with family and friends.
She also named the city: Praia Brava, Norte Da Ilha, Floripa. That's how she got the name for her swimwear line.
"Ocean girl," she wrote in her Instagram caption.
The model worked as a Victoria's Secret Angel for 13 years and was recognized as one of the world's highest-paid models.
'The fashion industry has evolved over the years, but there is still work to be done,' she said. 'I believe it should be more inclusive and reflective of the incredible, diverse beauty we see in real life.'
She also revealed what is most important in her life right now. 'I can't live without love, family, and friends.'
Alessandra previously told Harper's Bazaar that her style icons included Brigitte Bardot, Grace Kelly, and Marilyn Monroe, all of whom carried themselves with confidence and a sense of fun. They also embraced a timeless style.
The beauty also revealed how her relationship with her appearance has evolved. 'I believe I have developed an inner confidence. I didn't expect modelling to last, but here I am, still doing it and enjoying it.
'So, that has made me feel like I can embrace my appearance at any stage of my life.