Increasingly hostile conditions from the approaching trough caused further weakening, and the JTWC estimated the typhoon passed just east of Jeju Island with 1-minute winds of  at 0600 UTC on September 12. Shortly after, Maemi made landfall just west of Busan, South Korea, with the JMA estimating 10-minute winds of , and JTWC estimating 1-minute winds of . Risk Management Solutions estimated landfall winds of , which surpassed Typhoon Sarah in 1959.
The worsening conditions from the approaching trough led to further weakening, and the JTWC estimated the typhoon passed just east of Jeju Island with 1-minute winds of  at 0600 UTC on September 12. Shortly after, Maemi made landfall just west of Busan, South Korea, with the JMA estimating 10-minute winds of , and JTWC estimating 1-minute winds of . Risk Management Solutions estimated landfall winds of , which surpassed Typhoon Sarah in 1959.