The full moon will be visible in most parts of the country during Chuseok or Korean Thanksgiving.
The Korea Astronomy and Space Science Institute on Monday said the full moon will rise at 6:08 p.m. in Seoul next Monday, at 5:57 p.m. in Busan and at 6:06 p.m. in Gwangju.
The moon will reach its fullest at 10:38 a.m. the following day on Sept. 9 but will have set by then. It will therefore be at 6:03 that morning that it becomes almost a complete circle.
The full moon on Chuseok will be this year's second-largest and 13 percent bigger than the smallest one observed in January, the institute said. The largest was on Aug. 11.
The full moon varies in size due to the elliptical shape of the moon's orbit.
The Korea Meteorological Administration forecast that it will be cloudy across the country throughout the holidays with showers in some inland areas, but the full moon will still be visible between clouds.
Meanwhile, rain is expected to continue until Thursday this week across the country.