South Korea
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Masan, South Korea

Sea temperature

In September, the average sea temperature in Masan, South Korea, is 24.5°C (76.1°F).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.5°C (76.1°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)


The average length of the day in September in Masan is 12.4h.

How warm is the water in September in Masan?

In Masan, the average seawater temperature in September is 24.5°C (76.1°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.5°C (76.1°F).

How many hours of daylight does Masan have in September?

In September, the average length of the day in Masan, South Korea, is 12.4h.
Average sea temperature in September - Masan, South Korea
  • Average sea temperature in September: 24.5°C

The best month for swimming (with the highest average sea temperature) is August (26.1°C).
The coldest month (with the lowest average sea temperature) is March (12.4°C).

Average daylight in September - Masan, South Korea
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).