Port Moresby, Papua New Guinea offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Port Moresby is known for the Port Moresby Nature Park and the National Museum and Art Gallery. The best time to travel to Port Moresby, Papua New Guinea, is from June to September, with average air temperatures around 26-28°C (79-82°F) and water temperatures about 27-29°C (81-84°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!