Weather is probably a major factor when you plan your trip to Pearl Lagoon, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May with an average temp of 80°F, while the coldest months are January and February with an average of 77°F. The rainiest months in Pearl Lagoon are July, June, August, and October, with each month seeing an average of 18 inches of rainfall.