[Tomorrow's Weather] Weekend Heat Wave and Tropical Nights... Seoul Daytime Highs to Reach 37 Degrees

On Sunday, the 27th, the weather will be mostly clear across the country, and the heat will continue.

On the 25th, when the daytime high temperature in Seoul reached 36 degrees Celsius amid a heatwave, children cooled off by playing in the water at the '2025 Seoul Summer Beach Swimming Pool' set up in Gwanghwamun, Seoul. 2025.7.25 Photo by Jo Yongjun

The morning low temperatures are forecast to range from 22 to 28 degrees Celsius, and the daytime highs are expected to reach between 32 and 37 degrees. These temperatures are higher than the seasonal averages (morning 21 to 24 degrees, daytime 28 to 32 degrees).

With heat wave advisories issued nationwide, the maximum perceived temperature will rise to around 35 degrees, making it extremely hot.

There will be many areas experiencing tropical nights, where the temperature does not drop below 25 degrees overnight.

In Jeju Island, the rain that began in the afternoon of the previous day will continue. The rain is expected to last until the morning of the 28th.

The expected rainfall is 20 to 60 mm in the mountainous areas of Jeju Island, and 5 to 20 mm in the rest of Jeju Island.

Fine dust concentrations will remain at 'good' to 'moderate' levels nationwide due to smooth atmospheric diffusion.

Wave heights in the sea will be 0.5 to 1.5 meters off the east coast, and 0.5 to 2.0 meters off the west and south coasts.

In the offshore areas (about 200 km from the coastline), wave heights are expected to be 0.5 to 1.5 meters in the East Sea, 0.5 to 3.5 meters in the West Sea, and 1.0 to 3.0 meters in the South Sea.

For the time being, due to the strong lunar gravitational pull, sea levels will be high, and strong swells are expected to be brought into the coasts of Jeju Island, Jeonnam, and Gyeongnam South Coast.

There is also a possibility that the storm surge advisory, currently in effect for the central west coast of Jeonnam, could be expanded to the west coast, south coast, and the coast of Jeju Island.