Saco do Eustáquio is a mandatory refuge for those who are going by boat to the east side of the Island, and the crystal-clear waters to be found here are among Ilhabela's calmest. There are two bars offering huge bowls of fresh seafood, recently caught, at very reasonable prices. It is an irrecusable invitation to eat heartily and lay back taking life easy.

The white sandy beach is only 150 m long, and is well hidden at the back of a small bay. The spot is sheltered from the open sea by Cabeçuda point, which separates Saco do Eustáquio from Castelhanos bay, and by Búzios island, just opposite.