At Porto Alegre, near the Atlantic coast, the Jacuí transforms into a shallow estuary, known as the Guaíba River, and flows into the Patos Lagoon. Boats can travel up the river as far as Cachoeira do Sul.
In the coastal area of Porto Alegre, the Jacuí transforms into a shallow inlet called the Guaíba River, which flows into the Patos Lagoon. This allows boats to reach as far upstream as Cachoeira do Sul.