Planning for the weather is a good way to make your trip to Pulau Mantanani Besar relaxing and enjoyable, especially when you're splurging. The hottest months are usually May and June, with an average temperature of 27°C, while the coldest months are February and January, with an average of 26°C. The rainiest months in Pulau Mantanani Besar are January, December, November and October, with each month seeing an average of 276 mm of rainfall.