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Sumoto

Water Temperature in the Seto Inland Sea in Sumoto, Japan: Current, Historical Data and Forecast

On this page, you will find comprehensive information about the sea temperature in Sumoto in Japan, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Water Temperature in Sumoto

13.2°C

TODAY

12.9°C

YESTERDAY

12.9°C

A WEEK AGO

Analysis, Historical Data, and Forecast of Water Temperature

Today sea water temperature in the Seto Inland Sea in Sumoto is 13.2°C. The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart for Seto Inland Sea in Sumoto Over the Last 30 Days

The water temperature in Sumoto today is lower than both a week ago and a month ago. Today's sea temperature is generally in line with historical values for this day.

According to our forecast, the sea temperature in Sumoto will remain nearly unchanged in the coming days, its value will be 13.5°C.

Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.

Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts across Japan to enhance accuracy.

Water temperature data for Sumoto and nearby towns and resorts is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.

Table of Daily Sea Temperature Data

DateCurrentAverageForecast
Feb 1512.9°C13.0°C
Feb 1613.1°C13.5°C
Feb 1713.7°C14.3°C
Feb 1812.8°C13.8°C
Feb 1913.1°C14.0°C
Feb 2013.6°C13.5°C
Feb 2112.9°C13.8°C
Feb 2213.2°C13.3°C
Feb 2313.3°C13.2°C
Feb 2414.5°C13.3°C
Feb 2514.3°C13.4°C
Feb 2613.8°C13.4°C
Feb 2714.0°C13.5°C
Feb 2813.5°C13.5°C
Mar 113.5°C13.5°C
Mar 213.8°C13.5°C
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Sea Temperature in Sumoto Throughout the Year

Throughout the year, the sea temperature in Sumoto exceeds 77°F (25°C) for 75 days, exceeds 72°F (22°C) for 133 days, and exceeds 64°F (18°C) for 200 days.

Below is the annual chart of sea temperature changes in the Seto Inland Sea in Sumoto.

January

MinimumAverageMaximum
13°C15°C17°C

February

MinimumAverageMaximum
12°C14°C16°C

March

MinimumAverageMaximum
12°C14°C16°C

April

MinimumAverageMaximum
12°C14.5°C17°C

May

MinimumAverageMaximum
14°C18°C22°C

June

MinimumAverageMaximum
18°C22°C26°C

July

MinimumAverageMaximum
21°C24.5°C28°C

August

MinimumAverageMaximum
25°C28°C31°C

September

MinimumAverageMaximum
23°C27°C31°C

October

MinimumAverageMaximum
21°C24°C27°C

November

MinimumAverageMaximum
17°C21°C25°C

December

MinimumAverageMaximum
14°C17°C20°C

Monthly Water Temperature Histogram for Seto Inland Sea in Sumoto

You can explore detailed data on how the water temperature in Sumoto varies each month:

What Beaches Are There In and Around Sumoto?

Ohira Coast

Ohira Coast is a 1-stars sandy beach, located in a 8 km (5 miles) radius of Sumoto.

Link to the location of the beach

Sumoto Weather

FEBRUARY 23

-1°C / 5°C
scattered clouds: 25-50%

humidity: 57% | wind: 6 km/h

FEBRUARY 24

1°C / 7°C
clear sky

humidity: 54% | wind: 4 km/h

FEBRUARY 25

4°C / 10°C
broken clouds: 51-84%

humidity: 54% | wind: 5 km/h

FEBRUARY 26

4°C / 10°C
overcast clouds: 85-100%

humidity: 57% | wind: 2 km/h

Hyōgo Prefecture, JapanHyōgo Prefecture, JapanHyōgo Prefecture, Japan

Sea Temperature in the Seto Inland Sea in Sumoto: General Trends and Swimming Opportunities

Original name
洲本市
The Local Time
02:30
Time Zone
UTC+9
Sunrise
06:37
Sunset
17:48
Length of the day
11 h 10 m

The climate in the coastal areas of Hyōgo Prefecture, Japan is characterized by a humid subtropical climate with hot, humid summers and mild winters. The region experiences abundant rainfall, particularly during the monsoon seasons in June and July and the typhoon season in September.

Sumoto is located in Asia in the Northern Hemisphere at a latitude of 34 degrees, along the shores of the Seto Inland Sea. Sumoto lies within the Hyōgo Prefecture in Japan.

The average annual daytime air temperature in Sumoto is 20°C (68°F), with the average nighttime temperature being 12°C (54°F). The highest average daily temperature occurs in August, reaching 32°C (90°F), while the lowest is in January at 9°C (48°F). As for nighttime temperatures, the minimum average temperature of 2°C (36°F) is recorded in January, and the maximum is in August, reaching 25°C (76°F).

According to historical data, Sumoto experiences 137 rainy days per year, which accounts for 38 percent of all days in the year. On average, there are 11 rainy days each month. The wettest month is July, with 14 rainy days and 173 mm (6.8 inches) of precipitation, while the driest month is November, which typically has 9 rainy days and only 67 mm (2.6 inches) of precipitation.

The average annual water temperature in Seto Inland Sea in Sumoto is 20°C (68°F). In February, the water reaches its lowest point of the year at 12°C (54°F), while in August, it peaks at 31°C (88°F). The months suitable for comfortable beach vacations and swimming in the Seto Inland Sea are July, August, September, and October. During this period, the water temperature stays above 20°C (68°F) and can reach up to 31°C (88°F) on some days.

Geographical Location of Sumoto

Frequently Asked Questions About Sumoto and its Water Temperatures

What is the current sea temperature in Sumoto?

The water temperature today in the Seto Inland Sea in Sumoto is 56°F (13.2°C).

In which months is the water temperature in Sumoto comfortable for swimming?

The water temperature in the Seto Inland Sea in Sumoto is comfortable for swimming and beach vacations in July, August, September, and October.

What is the water temperature in Sumoto during the winter?

The water temperature in the Seto Inland Sea in Sumoto during the winter ranges from 12°C to 20°C (54°F to 68°F).

What is the water temperature in Sumoto during the spring?

The water temperature in the Seto Inland Sea in Sumoto during the spring ranges from 12°C to 22°C (54°F to 72°F).

What is the water temperature in Sumoto during the summer?

The water temperature in the Seto Inland Sea in Sumoto during the summer ranges from 18°C to 31°C (64°F to 88°F).

What is the water temperature in Sumoto during the fall?

The water temperature in the Seto Inland Sea in Sumoto during the fall ranges from 17°C to 31°C (63°F to 88°F).

Is it possible to swim in the sea in Sumoto year-round?

No, it is not possible to swim in the Seto Inland Sea in Sumoto year-round, the months suitable for comfortable swimming are July, August, September, and October.

What sea temperatures can I expect in Sumoto in the next month?

In March, the water temperature in the Seto Inland Sea in Sumoto will range between 54°F (12°C) and 61°F (16°C)