Hongdae (홍대 관광특구, Mapo-gu) — live crowd level from Seoul’s city sensors, today’s hour-by-hour forecast, weather and air, and what’s on nearby. Page refreshed every morning (2026-09-23); the box below updates itself while you read.
Crowd level — live
Moderate (at 14:30)
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Today’s forecast, hour by hour
| Time | Forecast | People (est.) |
|---|---|---|
| 16:00 | Somewhat crowded | 76,000–78,000 |
| 17:00 | Somewhat crowded | 78,000–80,000 |
| 18:00 | Somewhat crowded | 82,000–84,000 |
| 19:00 | Somewhat crowded | 82,000–84,000 |
| 20:00 | Somewhat crowded | 80,000–82,000 |
| 21:00 | Somewhat crowded | 74,000–76,000 |
| 22:00 | Moderate | 66,000–68,000 |
| 23:00 | Relaxed | 54,000–56,000 |
| 00:00 | Relaxed | 46,000–48,000 |
| 01:00 | Relaxed | 38,000–40,000 |
| 02:00 | Relaxed | 34,000–36,000 |
| 03:00 | Relaxed | 32,000–34,000 |
Events near Hongdae this month
| Event | Dates | Admission |
|---|---|---|
| [마포구립서강도서관] 독서토론회 [2026년 목, 수다] 마포구립서강도서관 3층 Book C · Other |
01-22 – 12-24 on now | Free |
| [이한열기념관] 6월 민주항쟁 39주년 기념 하반기 특별 전시 《이런 양심수》 이한열기념관 3층 기획전시실 · Exhibitions |
06-08 – 11-30 on now | Free |
| [마포구립서강도서관] 6-11월/길 위의 인문학 [독서 페어링：All that library to do] 마포구립서강도서관 3층 세미나실 / 독서관 / 예술의 전당 / 온라인(패들렛, zoom) · Workshops |
06-24 – 11-15 on now | Free |
| [마포구립서강도서관] 3분기/어린이갤러리 [내일은 맑겠습니다] 마포구립서강도서관 4층 어린이자료실 · Exhibitions |
07-01 – 09-30 on now | Free |
| [마포구립서강도서관] 7~10월/읽는 인간_호모 부커스 Ⅲ. [마르셀 프루스트의 『잃어버린 시간을 찾아서』 읽기] 온라인(ZOOM), 서강도서관 3층 세미나실 · Workshops |
07-16 – 10-29 on now | Free |
| 2026 서울문학기행 기행, 강연별 상이 · Workshops |
07-18 – 10-31 on now | Free |
| [마포구립서강도서관] 9월/행사 [9월 문화프로그램 안내] 마포구립서강도서관 · Workshops |
09-01 – 09-30 on now | Free |
| 홍익대학교 특별강연 [지역에 뿌리내린 문화 인프라 만들기: 로컬의 힘에서 국제적 교류로] 홍익대학교 인문사회관 A동 101호 · Workshops |
09-23 on now | Free |
| 전시 [Summer Breeze] 갤러리 지하 · Exhibitions |
10-03 – 10-05 | Free |
| 전시 [이름이 되어가는 풍경] 갤러리 지하 · Exhibitions |
10-03 – 10-05 | Free |
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FAQ
When is Hongdae least crowded?
Today’s forecast marks 22:00, 23:00, 00:00, 01:00 as relaxed or moderate, and 16:00, 17:00, 18:00 as crowded. The pattern repeats most days: mornings before 11:00 are the quietest window for tourist districts, evenings the busiest.
How is the crowd level measured?
The City of Seoul estimates the number of people in each area from mobile-network and sensor data and publishes it every five minutes with a four-step level (relaxed · moderate · somewhat crowded · crowded) and a forecast for the coming hours. This page reads that feed.
Does "crowded" mean I should avoid it?
Not necessarily — markets and Hongdae are lively because they are crowded. Use the forecast to time palaces, museums and cafés, where a queue actually costs you time.
Sources: Seoul realtime city data (citydata) and Seoul cultural events via Seoul Open Data Plaza · morning snapshot 2026-09-23 14:30. Crowd figures are the city’s estimates, not counts.