containing constantly updated data provided by the brazilian navy, waves is a valuable resource for anyone planning to surf on any beaches in rio.

published by surfline, this page displays the forecast for praia de grumari.

also by surfline, this clickable map shows the height of the waves on a number of beaches in both rio de janeiro and niterói - and this chart shows the forecast for all waves in rio's southern region.

this page, published and updated daily by the brazilian navy, shows the overall daily forecast for rio de janeiro state's coast, including waves (ondas), visibility (visibilidade), and maximum and minimum temperatures (temperatura).