South Korea expects a hot weekend with temperatures exceeding 30 °C, strong sunshine, and high levels of UV and ozone across the country [1, 2].

This early-summer heat wave arrives as the Korea Meteorological Administration warns of health risks associated with extreme sunlight and rising temperatures [2]. The sudden spike in heat puts pressure on public health infrastructure and increases the risk of heat-related illnesses during outdoor activities.

Many areas across the country are forecast to exceed 30 °C on Saturday [1]. The heat will be particularly intense in the Gyeongsang-do provinces, as well as in Seoul and Pohang [1, 2].

In the capital, Seoul is expected to see temperatures rise to about 30 °C on Sunday [1]. This follows a significant spike on Friday, when Seoul reached 31 °C [2]. Reports said that Friday peak marked the highest temperature of the year so far [2].

Other regions will experience even more extreme conditions. Temperatures in Pohang are projected to soar to about 34 °C on Sunday [1]. The combination of high heat and strong sunshine is expected to maintain elevated ozone levels throughout the weekend [1].

National weather agencies are monitoring the situation as the seasonal transition accelerates. Residents are encouraged to take precautions against high UV exposure to avoid skin and eye damage, a common concern during these early-summer peaks [1, 2].

Seoul reached 31 °C on Friday, the highest temperature of the year so far

The occurrence of record-high temperatures as early as May suggests an accelerating seasonal shift in South Korea. When high UV and ozone levels coincide with temperatures above 30 °C, it increases the likelihood of urban heat island effects in densely populated areas like Seoul, potentially leading to higher energy demands for cooling and increased public health advisories.