Waikawa Beach, New Zealand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Waikawa Beach, Manawatu Wanganui, New Zealand, is known for its proximity to the Tararua Forest Park and the Kapiti Island Nature Reserve. The best time to visit Waikawa Beach, New Zealand, is during the summer months of December to February, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!