Water temperature of the Sea of Japan in october Where to swim in the Sea of Japan in october 2025?
Several countries border the seaside of the Sea of Japan, including: South Korea, Japan and Russia. We measure the water temperature daily in these countries and archive it in order to calculate monthly averages, like those of the month of october.
Several countries border the seaside of the Sea of Japan, including: South Korea, Japan and Russia.
We measure the water temperature daily in these countries and archive it in order to calculate monthly averages, like those of the month of october.
The seasonal average for the water temperature in the month of october is between 52°F and 76°F. The lowest sea temperature measured this month is 46°F and the highest is 79°F.
The sea temperature map of the Sea of Japan in october
The map below presents a monthly average of the water temperature of the Sea of Japan for the month of october for several coastal cities. You can zoom and move around on the map. By clicking on the markers, you can see sea temperature details by city in october.
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWhere can you swim in the Sea of Japan in october?
Below, see the average temperatures measured in october in the different countries on the shores of the Sea of Japan.
South Korea
66°F to 75°F
pleasant swimmingJapan
59°F to 76°F
pleasant swimmingRussia
52°F to 57°F
freezing swimmingWater temperature of the Sea of Japan: choose another month
See monthly seasonal averages of the water temperature of the Sea of Japan by clicking on the links below: