There are few countries in the world which can offer the variation in climate and landscape available in Turkey. The country boasts an array of mountainous regions where temperatures can be freezing many months of the year against the backdrop of the Mediterranean Sea resorts which are attracting the vast number of tourists to the region.

However, Istanbul is one of the major attractions for overseas visitors and overseas investors with a population of over 12 million with the second largest city in Turkey, which is Ankara, hosting a population of just over 4 million. The mixture of sun, sea, sand, mountains and culture has always been available although the actions of the current Turkish government have seen many areas of the country opened up over the last few years. 

Season and Climate in Turkey is a year-round destination depending on your itinerary. Although the tourist "high season" (with associated higher rates) is from mid-June through mid-September, Spring and Fall are the best seasons to travel. The sun is warm and skies are generally clear. You can expect mild to warm temperatures and some rain during this time.

Marmara, Aegean and Mediterranean Coasts:

These coasts have a typical Mediterranean climate with hot summers and mild winters. The swimming season becomes shorter as one travels north. Because of the mountains, the east side of the Aegean and the North side of the Mediterranean could have regionally different climate...

Marmara and North Aegean :  South Aegean and Mediterranean:
 
Swimming : June to September. Swimming : April to October
Touring : March to November. Touring : All year round, July-August is not recommended as it may be too hot (40 Celsius) 
The High Season : Mid March-Mid November .   The High Season : June-August ;  
Mid Season : May, June and September ;  

Low Season: March, April and October .

! Many Resorts on the coasts are closed from mid October to end of March