Ephesus is exposed marble, so the time of year matters more here than on most of the coast.
April and May are perfect for the ruins: warm, bright and green, with the sea warming up by the end of May.
Hot at 32 to 36°C with little shade at Ephesus; visit at opening time. Beaches and boat trips are at their best.
September and October are ideal, with warm seas and cooler mornings for sightseeing.
Mild and often sunny, with the ruins almost empty. Many resort hotels close, but Selçuk stays open.
May, early June, September and October. If you come in July or August, see Ephesus first thing in the morning.
See the top things to do in Kuşadası & Ephesus, how to get there and where to stay. For the whole country, read the best time to visit Turkey.