World sea water temperatures

Seto Inland Sea water temperature in December

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In December sea water temperature all along the Seto Inland Sea coast is not yet warm enough for swimming and does not exceed 20°C. The warmest average water temperature Seto Inland Sea in December is 17.2°C (in Matsuyama Shi), and the coldest sea surface temperature is 14.3°C (in Takamatsu 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 December?

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

 
2024
2023
2022
2021
2020
16.3°C
15.9°C
16.5°C
15.9°C
16.1°C
16.3°C
16.6°C
16.5°C
16.1°C
16.3°C
17.1°C
17.1°C
17.2°C
16.7°C
17°C
14.8°C
14.7°C
15.3°C
14.3°C
15°C

Countries bordering the Seto Inland Sea

Water temps of the Seto Inland Sea coast monthly

Where is the warm sea water in December?

Want to know where the water temperature in December is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

Other names for 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.

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