Planning for the weather is a good way to make your trip to Praia Grande relaxing and enjoyable, especially when you're splurging. 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 Praia Grande are September, January, October and March, with each month seeing an average of 192 mm of rainfall.