Weather is probably a major factor when you plan your trip to Grand-Bassam, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March, with an average temperature of 28°C, while the coldest months are August and September, with an average of 25°C. The rainiest months in Grand-Bassam are June, May, October and July, with each month seeing an average of 250 mm of rainfall.