The summer months (Dec to Feb) is the peak tourist season at Phillip Island for the pleasantly warm weather and fewer showers. However, the attractions within the island tend to be packed with large crowds, so we suggest you start your day early.
Off-peak seasons like spring (Sep to Nov) and autumn (Mar to May) are also great times to visit Phillip Island. The weather isn’t too cold and the crowds are comparatively lesser. The spring allows you to spot budding trees and newborns in the wild. Keep a jacket with you just in case you come across a few stray cool breezes.
The autumn season is usually the least popular tourist season after winter, but the lesser crowds also means that you’re mostly going to have a very relaxing visit with very few other souls around. The Penguin Parade, however, tends to start quite late in the day, especially because of daylight savings. It can get quite chilly here at this time, so carry extra warm layers.