Weather will likely play an important role when you plan your trip to Tantagan, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 22°C, while the coldest months are July and June, with an average of 22°C. The rainiest months in Tantagan are May, November, January and June, with each month seeing an average of 509 mm of rainfall.