Although Turkey is located in a region where the conditions are , in general, temperate, the diverse nature of the landscape, the mountains and the coastal areas, create a blend of climates ranging from warm Mediterranean areas to cold inland areas.
The high tourist season lasts from mid-June to mid-September, spring and fall are the best times to travel to Turkey. If you want to swim, July and August are suitable for such an activity regardless of the sea you choose to bath in. However, if you want to travel during the shoulder season, the South Aegean and Mediterranean coasts are the best choices (as swimming is possible from April until October). For sightseeing, regardless of the area you head to, April is a good choice.
In Ankara, the coldest month is January and the hottest is August. The average high temperatures range from 1C in January and 28C in August, while the average low temperatures range from -6C in January and 12C in July and August.
In Antalya, the coldest months are January and February, while the hottest months are July and August. The average high temperature ranges between 14C in January and February and 33C in July and August, while the average low temperatures range from 5C in January and February and 21C in July and August.
In Bodrum, the coldest months are also January and February (avg.high 13C / avg.low 8C), while the hottest months are July and August (avg.high 32C / avg.low 24C).
In Istanbul, the coldest month is January (avg.high 7C / avg.low 2C), while the hottest month is August (avg.high 27C / avg low 19C).
The climate of Turkey has a vast diversity depending on the topography and latitude.
The Aegean and Mediterranean coast areas are blessed with Mediterranean climate. The hot and sunny season lasts from May to October. That’s when you can hardly see any rain. The winters are mild, but rainy. It rarely snows, with the exception of the mountain areas.
Around the Sea of Marmara (including Istanbul), has a blend of climates, having characteristics from both ocean climate and semi-Mediterranean climate. During the hot summer months, showers are common. Winters are colder and snow is common, although it doesn’t stay on the ground for too long. The water is colder than the one in the Aegean and Mediterranean seas, so the swimming season is restricted to June, July and August.
The Black Sea region has an oceanic climate, with a lot of precipitation year round. Summers are warm but humid, while winters are cold and damp. It does snow but it doesn’t stick to the ground for too long. The mountain areas are snowy. The water is even colder than the one in the Marmara Sea.
In the interior areas (such as Ankara), the summers are hot and the winters are cold and snowy. The southern area has a desert-like climate with temperatures close to 40C in the summer and not a drop of rain.