Hervey Bay boasts of almost perfect climate throughout the year. Hervey Bay weather is characterized by mild, subtropical climate with an average maximum temperature of 26.2° (79°F) and a minimum of 16.6°C (62 °F). It rarely sees extreme temperatures; however, cyclone warnings have been issued from time to time in the summer.
The best time to visit Hervey Bay is during the whale-watching season between August to October when several operators run cruises in the bay to observe the whales that stop to rest for a while with their calves during their migration to Antarctica.
So, the best time to visit Hervey Bay is between the months of August to October.