Google says its exact coordinates are 6.1360° S, 143.9555° E.
If you take a ruler and measure out the distance between Port Moresby and the Equator, and use the same measurement to outline the space between the Equator and the Philippines, you will end up in areas around the Northern Mindanao. As a child, I have lived a couple of years in Cagayan De Oro. At around May to July, that place will receive a lot of rain throughout those times.