Ayvalik and bridge-connected Cunda combine a documented Turkish day-boat scuba scene with rocky Mediterranean reefs, deeper red-coral habitat, long beaches and historic stone streets. Ayvalik 3 Sea and Kuzey Mavi describe local guided or training services, while Cunda operators run day trips with island-bay swimming stops. June and September are practical months for a balanced sea-and-town visit, though local industry reports that diving may occur in other months. Crucially, the Ayvalik Islands Nature Park and underwater heritage rules require site-by-site access checks. Deep coral and wreck routes are not beginner guarantees. Snorkeling is primarily a boat-swim or beach add-on; a current specialized freediving school was not verified.