The Mazu birthday festival on the 23rd day of the third lunar month (typically April) is the defining event, drawing over a hundred thousand pilgrims and creating a genuinely overwhelming spectacle. The island's infrastructure collapses under the pressure — accommodation is impossible to find without booking months ahead, and ferries queue for hours. Come for the festival only if you embrace the chaos; otherwise avoid it.
Outside the festival season, spring (March–May) and autumn (September–November) are the most comfortable times to visit. Summer is hot and humid, with occasional typhoons. Winter is quiet, with the temple almost empty on weekday mornings — the most contemplative time to see it.