South Korea is bracing for a spell of wet and turbulent weather as rain is forecasted to sweep across the country starting Monday, May 11, 2026. According to reports from Newsis and Yonhap News TV, the central region will be the first to see showers in the morning, with the rain gradually spreading to Jeonbuk and Gyeongbuk regions by the afternoon. This rainfall is expected to continue through Tuesday evening, offering much-needed relief to areas that have been grappling with dry conditions.
For many, the rain will be a welcome change. The forecast predicts that the precipitation will help ease the persistent dryness that has led to warnings in several areas, including parts of Seoul, inland Gyeonggi, the eastern coast of Gangwon, Chungbuk, and Gyeongbuk. Even so, the Korea Meteorological Administration (KMA) urges residents to remain vigilant, as the air will remain dry in the metropolitan and Gyeongnam regions despite the showers.
But it’s not just gentle showers on the horizon. Weather experts warn that the rain will be accompanied by gusty winds, thunder, and lightning, particularly in inland areas. Some regions may even experience hail, a rare but disruptive phenomenon for this time of year. "During the rain, gusts and lightning are expected, requiring caution for safety accidents," noted Yonhap News TV meteorologist Kim Su-jin. That means anyone venturing outside should keep an umbrella handy and stay alert for sudden changes in the weather.
The rainfall amounts are expected to vary by region. According to the KMA, by the end of Tuesday, Seoul, Incheon, and Gyeonggi could see 5 to 20 millimeters of rain, while Gangwon’s inland and mountainous areas are also in the 5 to 20 millimeter range. The Daejeon, Sejong, Chungnam, and Chungbuk regions, as well as Gwangju, Jeonnam, and Jeonbuk, are set for heavier showers, with totals between 10 and 40 millimeters. Busan, Ulsan, Gyeongnam, Daegu, and Gyeongbuk can expect anywhere from 5 to 40 millimeters, and Jeju is forecasted to receive 5 to 20 millimeters.
With the rain comes a mostly cloudy sky across the nation, setting a somber but refreshing tone for the start of the week. Central regions will feel the coolness more acutely, especially as the rain arrives early and lingers throughout the day. According to Newsis, morning temperatures on May 10 are as follows: Seoul 12°C, Incheon 13°C, Suwon 12°C, Chuncheon 9°C, Gangneung 17°C, Cheongju 12°C, Daejeon 12°C, Jeonju 12°C, Gwangju 13°C, Daegu 11°C, Busan 14°C, and Jeju 15°C. Daytime highs will range from 19°C to 26°C, with Seoul, Incheon, and Suwon reaching 20-21°C, and southern cities like Daegu and Jeonju climbing to 25-26°C. "Central regions will experience cool weather throughout the day," Kim Su-jin added, while "southern regions will be warmer with daytime temperatures near 25°C."
Despite the rain, the air quality will remain excellent. The fine dust concentration is expected to stay at 'good' levels nationwide, a silver lining for those concerned about pollution. That’s a small but significant relief, as spring in Korea often brings bouts of yellow dust and fine particulate matter.
There are, however, some hazards to watch out for. The KMA has issued a special caution for fog, particularly in the Jeonnam region during the early morning hours of May 11. Visibility could drop below one kilometer, posing risks for drivers and commuters. "Fog with visibility less than 1 km is expected mainly in Jeonnam in the early morning hours on May 11, 2026, requiring caution for traffic safety," Newsis reported. Safety on the roads should be a top priority for anyone traveling in these conditions.
Another notable feature of this week’s weather is the sharp temperature swings, especially in the inland Gyeongsang region. Residents there can expect differences of 15 to 20 degrees Celsius between daytime highs and nighttime lows. Such swings can catch people off guard, so health experts recommend dressing in layers and staying hydrated to avoid catching a chill or overheating as the day progresses.
The sea will not be spared from the effects of the changing weather. On May 10, waves in the waters off Jeju and the West Sea are expected to reach up to 2.5 meters in height. This could impact fishing and shipping activities, so those working at sea are advised to monitor conditions closely and exercise caution.
Looking ahead, the rain is expected to clear out by midweek, but that won’t mean a return to mild spring weather. Instead, forecasters are predicting a sharp rise in temperatures, with a heatwave looming for the latter half of the week. "After the rain ends, a heatwave with temperatures approaching 30°C is expected in the latter half of the week starting from May 13, 2026," according to Yonhap News TV. Such a rapid transition from cool, rainy conditions to near-summer heat is not uncommon in Korea’s spring, but it can be jarring for those unprepared.
Given the expected weather patterns, the KMA and local authorities are urging the public to take necessary precautions. That includes carrying umbrellas, watching out for sudden gusts and lightning strikes, and paying close attention to weather updates, especially if planning outdoor activities or travel. For those in regions under dryness warnings, the rain may not be enough to fully alleviate the risk of wildfires or agricultural drought, so continued vigilance is advised.
For city dwellers in Seoul and other major urban centers, the rain brings a mixed bag. On one hand, the showers will help clear the air and provide some respite from the dryness. On the other, the combination of rain, wind, and possible hail could disrupt daily routines and commuting. Still, the overall outlook suggests that the benefits—cleaner air, replenished soil moisture, and a break from the dust—will outweigh the inconveniences, at least for now.
As the country heads into this unsettled stretch of weather, the key takeaway is preparedness. Whether it’s a sturdy umbrella, a weather app on your phone, or simply an extra sweater for the evening chill, a little planning can go a long way. And with the promise of summer-like warmth on the horizon, South Koreans may soon be swapping raincoats for sunglasses as the season shifts once again.