Weather will likely play an important role when you plan your trip to Bangka Island, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and May with an average temp of 81°F, while the coldest months are February and January with an average of 80°F. The rainiest months in Bangka Island are May, June, November, and April, with each month seeing an average of 13 inches of rainfall.