Weather is probably a major factor when you plan your trip to Sabu Island, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually December and April with an average temp of 84°F, while the coldest months are August and July with an average of 80°F. The rainiest months in Sabu Island are January, February, December, and March, with each month seeing an average of 9 inches of rainfall.