If you're hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Balneario Gaivota: The hottest months are usually February and January, with an average temperature of 23°C, while the coldest months are July and June, with an average of 16°C. The rainiest months in Balneario Gaivota are September, January, October and March, with each month seeing an average of 191 mm of rainfall.