In May warmest sea in South Korea is usually observed in the following locations: Jeju, Busan, Incheon.
Table below shows the average sea water temperature for marine resorts of South Korea in May for the last three years.
| Place name | May 2025 | May 2024 | May 2023 |
|---|---|---|---|
| Jeju | 60.9°F | 63.4°F | 63.0°F |
| Busan | 59.4°F | 62.4°F | 61.2°F |
| Incheon | 58.9°F | 61.1°F | 59.4°F |
| Seoul | 58.7°F | 61.1°F | 59.3°F |
| Yongpyong | 55.7°F | 59.9°F | 57.5°F |
Charts below show average sea water temperature for South Korea resorts with the warmest sea in May.
You can also check other months of the year to see sea temperature of South Korea resorts at that time.
Places in South Korea:
Name
°F
