Weather will likely play an important role when you plan your trip to Port Olry, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and February with an average temp of 79°F, while the coldest months are August and July with an average of 76°F. The rainiest months in Port Olry are March, January, February, and April, with each month seeing an average of 15 inches of rainfall.