Seto Inland Sea water temperature in September

In September sea water temperature all along the Seto Inland Sea coast warms above 20°C and it is enough for a comfortable bathing. The warmest average water temperature Seto Inland Sea in September is 28.2°C (in Takamatsu Shi), and the coldest sea surface temperature is 24.6°C (in Matsuyama Shi). To find out the sea temperature today and in the coming days, go to Current sea temperature of the Seto Inland Sea

Where you can swim in the Seto Inland Sea in September?

This data on the average monthly surface water temperature on the Seto Inland Sea coast in September. 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 Seto Inland Sea

Setouchi, Inland Sea, Seto Naikai

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Our report for Seto Inland Sea 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.