Taking the local weather in Cayos Los Grullos into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually June and September, with an average temperature of 27°C, while the coldest months are February and January, with an average of 26°C. The rainiest months in Cayos Los Grullos are October, August, July and November, with each month seeing an average of 309 mm of rainfall.