Swimming in South Korea in october 2025 Sea temperature by city in october
Do you want to go to the beach in South Korea in october 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in october in South Korea by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in South Korea in october 2025
Here, find the average sea temperature in South Korea in october in several coastal cities.
South in october
73°F
min: 69°F / max: 77°F
72°F
min: 67°F / max: 76°F
Namhae
70°F
min: 65°F / max: 75°F
Tongyeong
72°F
min: 67°F / max: 77°F
Ulsan
73°F
min: 69°F / max: 76°F
Yeosu
70°F
min: 65°F / max: 75°F
Northeast in october
North West in october
66°F
min: 61°F / max: 70°F
Ansan-si
66°F
min: 61°F / max: 70°F
Hwaseong-si
66°F
min: 61°F / max: 70°F
East in october
71°F
min: 68°F / max: 74°F
Gyeongju
72°F
min: 69°F / max: 75°F
Uljin
68°F
min: 63°F / max: 73°F
West in october
Gunsan
67°F
min: 62°F / max: 71°F
Where should you go swimming in South Korea in the month of october?
Swimming in South Korea in october is pleasant (in the best case scenario)
In october in South Korea swimming conditions vary by city. Details below:
As for Busan, Jeju Island (Jejudo), Pohang, Gyeongju, Tongyeong, Ulsan, Yeosu, Gaigeturi, Goseong, Jangan, Oepo and Seogwipo, swimming is pleasant in october. The sea water is 73°F on average (min: 69°F/max: 77°F) so you can easily spend time in the water.
Swimming in october in Gangneung, Incheon, Sokcho, Namhae, Uljin, Ansan-si, Gunsan, Haenam, Hwaseong-si, Moppo and Muan is possible but the sea is generally cool. So though the sea temperature may sometimes reach 72°F, it can also go as low as 62°F. Note that the average is 67°F.
Where to go swimming in South Korea in october: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in october
Busan
| October | |||
| Average sea temperature | 73°F | ||
| Minimum sea temperature | 69°F | ||
| Maximum sea temperature | 77°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 70°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 2.9in | ||
| Number of days of precipitation | 2 jour(s) (8%) | ||
| Cloud cover | 28% | ||
| Our opinion | pleasant swimming |
More information on swimming in Busan in october
Jeju Island (Jejudo)
| October | |||
| Average sea temperature | 72°F | ||
| Minimum sea temperature | 67°F | ||
| Maximum sea temperature | 76°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 70°F | ||
| Minimum outside temperature | 65°F | ||
| Precipitation | 6in | ||
| Number of days of precipitation | 4 jour(s) (12%) | ||
| Cloud cover | 37% | ||
| Our opinion | pleasant swimming |
More information on swimming in Jeju Island (Jejudo) in october
Gangneung
| October | |||
| Average sea temperature | 67°F | ||
| Minimum sea temperature | 62°F | ||
| Maximum sea temperature | 72°F | ||
| Average outside temperature | 59°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 54°F | ||
| Precipitation | 4.4in | ||
| Number of days of precipitation | 3 jour(s) (11%) | ||
| Cloud cover | 28% | ||
| Our opinion | cool swimming |
More information on swimming in Gangneung in october
Incheon
| October | |||
| Average sea temperature | 66°F | ||
| Minimum sea temperature | 61°F | ||
| Maximum sea temperature | 70°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 3in | ||
| Number of days of precipitation | 3 jour(s) (10%) | ||
| Cloud cover | 25% | ||
| Our opinion | cool swimming |
More information on swimming in Incheon in october
Pohang
| October | |||
| Average sea temperature | 71°F | ||
| Minimum sea temperature | 68°F | ||
| Maximum sea temperature | 74°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 5in | ||
| Number of days of precipitation | 3 jour(s) (11%) | ||
| Cloud cover | 30% | ||
| Our opinion | pleasant swimming |
More information on swimming in Pohang in october
List of coastal cities in South Korea
| Busan in october | pleasant swimming |
| Jeju Island (Jejudo) in october | pleasant swimming |
| Gangneung in october | cool swimming |
| Incheon in october | cool swimming |
| Pohang in october | pleasant swimming |
| Sokcho in october | cool swimming |
| Gyeongju in october | pleasant swimming |
| Namhae in october | cool swimming |
| Tongyeong in october | pleasant swimming |
| Uljin in october | cool swimming |
| Ulsan in october | pleasant swimming |
| Yeosu in october | pleasant swimming |
| Ansan-si in october | cool swimming |
| Gaigeturi in october | pleasant swimming |
| Goseong in october | pleasant swimming |
| Gunsan in october | cool swimming |
| Haenam in october | cool swimming |
| Hwaseong-si in october | cool swimming |
| Jangan in october | pleasant swimming |
| Moppo in october | cool swimming |
| Muan in october | cool swimming |
| Oepo in october | pleasant swimming |
| Seogwipo in october | pleasant swimming |