Lagoa Verde is the tourist name for a spot next to Ilha da Longa, on the northwest coast of Ilha Grande, near Araçatiba. The relationship between the islet, tide, and vegetation helps explain why the landscape changes throughout the day: during very low tides, a stretch of sand and stones appears. The tour may include observing the marine environment, always subject to navigation conditions and local rules. Visually calm water does not guarantee safe swimming; assess currents, vessels, and your own swimming ability. Do not feed fish or touch marine organisms. Confirm boarding, return times, and costs with operators; there is no transportation or equipment included in this listing. Sources consulted on 09/30/2026.