Dalaman’s climate is not necessarily indicative of all of Turkey. Turkey has a diverse group of regions with its own unique topography. Dalaman shares the Mediterranean coastal climate of surrounding provinces and cities, which tends to be hot and usually dry, especially in the summer. The summer period is between May and October. Winters, on the other hand, are generally mild but a bit rainy. Coastal areas do not see much in the way of snow, except in mountain peaks of about two thousand metres. The water is certainly warm during the summer season, which sees lots of swimming. In contrast, some areas outside of Dalaman, including Istanbul, seems to rain more during the summer. Even Ankara inland has a hot summer and cold winters. One thing you will notice if you visit during the winter season is how short the winters seem compared to the summer season. Chances are, if you come to Dalaman at all, you are going to see a very sunny destination. Summers can get surprisingly hot, with record months in July reaching 48.5 °C (and 119.3 °F). However, summer heat is mitigated by the nice ocean breeze.
In the winter, February is the coldest month and temperatures can reach −5.3 °C and (22.5 °F). However, the average summer temperature for the hottest month of the year, July/August, is of 31°C (88°F). Dalaman has about 320 days of sunshine every year and the Lycian way receives about 13 hours of sunshine during the summer reason. June through September is the period where rain is scarce. June sees about four days on average, or 11 millimetres, while July sees seven days and 4mm. August gets only slightly more at 5mm and seven days.
If you plan to travel in the off season you can avoid the crowds and expect much cooler temperatures. Autumn averages 23°C (73°F), or 14°C (57°F) as late as November. The sea is still swimmable even in these cooler temperatures. However, during winter, when there is only an average of eight hours of sunshine, it may actually be a more comfortable time to travel. January averages the most rain, with 216mm or 14 days worth, and February is close. Spring certainly has warmer temperatures and less rainfall, and better yet, fewer fellow tourists. Spring temperatures are steadily rising but not quite hot.