Sea temperature and swimming season in North Korea
When the sea is warm enough to swim in 15 coastal cities in North Korea.
| City | Warmest | Coldest | Swimming season |
|---|---|---|---|
| Hŭngnam | 25.6°C Aug | 3.9°C Feb | Jul – Sep (3 months) |
| Wŏnsan | 26.3°C Aug | 2.7°C Feb | Jun – Sep (4 months) |
| Chongjin | 23.9°C Aug | 3.1°C Feb | Jul – Sep (3 months) |
| Haeju | 26.3°C Aug | 2.9°C Feb | Jun – Oct (5 months) |
| Ch’ŏngdan-ŭp | 26.5°C Aug | 2.8°C Feb | Jun – Oct (5 months) |
| Kwail-ŭp | 23.2°C Aug | 4.1°C Feb | Jul – Oct (4 months) |
| Hongwŏn | 25.6°C Aug | 3.9°C Feb | Jul – Sep (3 months) |
| Hwadae | 23.4°C Aug | 4.9°C Feb | Jul – Sep (3 months) |
| Rajin | 23.6°C Aug | 2.0°C Feb | Jul – Sep (3 months) |
| Ongjin | 24.8°C Aug | 4.8°C Feb | Jul – Sep (3 months) |
| Changyŏn | 23.2°C Aug | 4.1°C Feb | Jul – Oct (4 months) |
| Iwŏn-ŭp | 24.1°C Aug | 4.8°C Feb | Jul – Sep (3 months) |
| Sindo | 25.5°C Aug | -0.7°C Feb | Jun – Sep (4 months) |
| Sŭngam-nodongjagu | 23.9°C Aug | 3.7°C Feb | Jul – Sep (3 months) |
| Yŏmju | 25.6°C Aug | -0.6°C Feb | Jun – Sep (4 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