Weather is probably a major factor when you plan your trip to Orpheus Island, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually January and December, with an average temperature of 27°C, while the coldest months are July and June, with an average of 21°C. The rainiest months in Orpheus Island are January, February, March and December, with each month seeing an average of 202 inches of rainfall.