Sea temperature and swimming season in South Korea
When the sea is warm enough to swim in 15 coastal cities in South Korea.
| City | Warmest | Coldest | Swimming season |
|---|---|---|---|
| Busan | 27.0°C Aug | 13.7°C Feb | Jun – Nov (6 months) |
| Incheon | 25.7°C Aug | 3.6°C Feb | Jul – Oct (4 months) |
| Ulsan | 26.9°C Aug | 13.9°C Feb | Jun – Nov (6 months) |
| Hwaseong-si | 25.5°C Aug | 3.9°C Feb | Jul – Oct (4 months) |
| Jeju City | 28.2°C Aug | 14.2°C Mar | Jun – Nov (6 months) |
| Yeosu | 26.8°C Aug | 9.1°C Feb | Jun – Oct (5 months) |
| Gunsan | 27.5°C Aug | 5.3°C Feb | Jun – Oct (5 months) |
| Gangneung | 25.7°C Aug | 9.4°C Feb | Jun – Oct (5 months) |
| Gijang | 27.2°C Aug | 13.8°C Feb | Jun – Nov (6 months) |
| Boryeong | 26.6°C Aug | 5.4°C Feb | Jun – Oct (5 months) |
| Sokcho | 25.8°C Aug | 8.7°C Feb | Jun – Oct (5 months) |
| Seosan | 26.1°C Aug | 5.2°C Feb | Jul – Oct (4 months) |
| Santyoku | 25.6°C Aug | 11.1°C Feb | Jun – Oct (5 months) |
| Gaigeturi | 28.3°C Aug | 13.6°C Mar | Jun – Nov (6 months) |
| Jumunjin | 25.7°C Aug | 9.4°C Feb | Jun – Oct (5 months) |
Knowing the temperature is only half of it. What to wear, and why cold shock is the real risk →
Season uses 19°C. Why that number, and where the data comes from