The summer season runs from May to October, with peak crowds in July and August. The turtle nesting season is June to August, when beach rules are most strictly enforced and the chance of spotting a turtle is highest. September and October are the best months for a quieter visit — the weather is still warm and clear, the sea is at its warmest, and prices drop significantly.
Outside the summer season, most restaurants and accommodation in Kalamaki close. Zakynthos Town and the island's northern villages remain open year-round.