Visiting local bars in Tulagi Island is more fun when you know what the weather holds. These temperatures and rainfall averages can help you decide the best time for bar hopping. The hottest months are usually May and November with an average temp of 80°F, while the coldest months are August and July with an average of 80°F. The rainiest months in Tulagi Island are March, December, January, and February, with each month seeing an average of 17 inches of rainfall.