Weather will likely play an important role when you plan your trip to Namatanai, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and October, with an average temperature of 27°C, while the coldest months are August and September, with an average of 27°C. The rainiest months in Namatanai are March, April, December and February, with each month seeing an average of 415 mm of rainfall.