The short version
April to June and September to October. Warm without being punishing, the coast open, the archaeological sites walkable in daylight, and the crowds thinner than in high summer.
Spring
April and May are arguably the best weeks of the year. Istanbul is in blossom, the Aegean sites are green rather than bleached, and Cappadocia has not yet turned hot. Balloon flights are weather-dependent in any season and spring winds do cancel some mornings, so leave yourself a spare day.
June is warm and reliable and the last month before the coast fills.
Summer
July and August are hot everywhere and very hot on the Aegean and Mediterranean coasts and at the inland ruins. Ephesus in August is an open site with almost no shade, which turns a three-hour visit into an early-morning dash. The coast is at its busiest and its most expensive at exactly this point. It is not a wasted trip, but it is the worst value in the calendar.
Autumn
September and October are the other good window, and often the better of the two. The sea is still warm from the summer, the light is excellent, and the sites empty out from about the middle of September.
Winter
This is where the country divides. Istanbul in winter is genuinely good: cold, often grey, sometimes snowy, and the museums and mosques belong to you rather than to a queue. Cappadocia in winter is beautiful under snow and cold enough to shorten a day outdoors considerably, and the plateau nights are hard. The coast largely closes; many hotels and restaurants in the resort towns simply shut.
Ramadan
Turkey is a secular republic and the practical effect is far lighter than in the Gulf. Restaurants stay open, life continues, and in the more conservative interior you will notice it more than on the coast or in central Istanbul. Iftar in Istanbul, when the squares around the historic mosques fill for the evening meal, is one of the better things to be present for.
What we would book
Ten days in early May or late September: Istanbul, then Cappadocia, then the Aegean for Ephesus, flying between rather than driving. See the weather guide and getting around.
Sources
- UK Foreign, Commonwealth & Development Office: Turkey health: vaccination advice and health risks for travelers. Accessed 14 September 2026.
- UNESCO World Heritage Centre: the inscription of Göreme National Park and the Rock Sites of Cappadocia in 1985 under criteria (i)(iii)(v)(vii). Accessed 14 September 2026.
- UK Foreign, Commonwealth & Development Office: Turkey travel advice: the FCDO advises against all travel to parts of Turkey. Accessed 14 September 2026.