In May 2026, Southern Turkey is generally slightly hotter than mainland Spain, particularly toward the end of the month. In destinations like Antalya, Alanya, or Belek, average daytime temperatures in May range from 24°C to 28°C (75°F to 83°F), with coastal water temperatures becoming pleasant for swimming. In contrast, while southern Spanish cities like Seville or Malaga can see similar highs (24°C–26°C), the coastal areas and the Balearic Islands (like Ibiza and Mallorca) tend to be slightly fresher, averaging around 21°C to 24°C. However, if you include the Canary Islands (which are part of Spain but located off the coast of Africa), Lanzarote and Tenerife offer a very consistent 23°C to 25°C throughout May. Turkey’s "hottest" advantage comes from its more "continental" influence and longer sunshine hours (up to 12 hours a day) in the eastern Mediterranean. For travelers seeking a "beach-ready" holiday in May, Turkey’s Turquoise Coast is often the safer bet for guaranteed heat, whereas Spain offers a more mild, "spring-like" warmth that is ideal for city sightseeing and hiking without the intense summer humidity.