Sea of Japan water temperature in August

In August sea water temperature all along the Sea of Japan coast warms above 20°C and it is enough for a comfortable bathing. The warmest average water temperature Sea of Japan in August is 29.5°C (in Niigata-Shi), and the coldest sea surface temperature is 23°C (in Sapporo). To find out the sea temperature today and in the coming days, go to Current sea temperature of the Sea of Japan

Where you can swim in the Sea of Japan in August?

This data on the average monthly surface water temperature on the Sea of Japan coast in August. To see the details, select the country and then the city of your interest. Besides water temperature, you can also get information about the weather for today, tomorrow and the upcoming days, surf forecast, as well as the data on sunrise/sunset and moonrise/moonset at a given point on any given day.

Countries bordering the Sea of Japan

East Sea

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Our report for Sea of Japan is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.