Rakiraki: when to go? Whether you love the heat or the cold, if you're planning a trip here, it could be useful for you to know: January, has temperatures that can reach 26°C, it's the hottest month at this touristic destination. June instead is the coldest month, where temperatures can trop to 23°C. The water temperature of the sea can go from 29°C in the summer months to 25°C during the coldest months.