Çeşme is surrounded by beaches. Diamond Beach (Pırlantı Plajı) is good for kitesurfing and windsurfing, and ultrapopular Altınkum has sandy coves and is good for swimming. Both are south of the city centre and can be easily accessed by dolmuş.

From late May to September, gülets (traditional Turkish wooden yachts) operated by companies including Simay and Çeşme Lady Bente offer boat trips to nearby Donkey Island, Green Bay, Blue Bay, Paradise Island and Aquarium Bay, where you can swim and snorkel. The cruises usually cost ₺40–₺50 per passenger, including lunch, and involve plenty of partying on board. Boats depart 10am to 10.30am and return in the late afternoon.