Overview: Mission BeachMission Beach (Australia) is a place with a tropical climate. The day temperatures range from 25 °C (76 °F) in July to 31 °C (88 °F) in December. The least rainy month in Mission Beach is September with its 7 days of rain, the rainiest month is February, when it rains 20 days. Sea temperatures are in the following range: 23 °C (73 °F) in July to 29 °C (84 °F) in February. Temperatures during the night go from 15 °C (59 °F) in July to 23 °C (74 °F) in January.