Try a daybreak excursion to overcome the crowds, watch pale spill over the caldera
https://rylanuvxe392.wordcanopy.com/posts/top-santorini-island-tours-from-caldera-views-to-winery-tastings-and-hidden-villages-2
Try a break of day journey to beat the crowds, watch gentle spill over the caldera, and catch serene streets ahead of the island wakes up.