Weather will likely play an important role when you plan your trip to Kadavu Island, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and March, with an average temperature of 27°C, while the coldest months are August and July, with an average of 24°C. The rainiest months in Kadavu Island are March, February, January and April, with each month seeing an average of 314 mm of rainfall.