Weather is probably a major factor when you plan your trip to Tandong, but bear in mind that cheaper options are usually available when the weather isn’t as good. The hottest months are usually May and March, with an average temperature of 27°C, while the coldest months are January and February, with an average of 25°C. The rainiest months in Tandong are November, December, April and October, with each month seeing an average of 266 mm of rainfall.