What is the best season to visit Shikoku?

I'm curious, what's the ideal time of year to embark on a journey to the mystical island of Shikoku? With its stunning temples, lush forests, and serene beaches, does it truly have a peak season that offers the most enchanting experience? Or are there specific months that offer unique advantages over others, whether it's to avoid crowds, enjoy mild weather, or immerse oneself in local festivals? I'm eager to hear your thoughts on navigating the best time to visit this enchanting destination.