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Water Temperature in the Seto Inland Sea in Osaka, Japan: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Osaka 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 Osaka
12.4°C
TODAY
11.7°C
YESTERDAY
11.7°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Seto Inland Sea in Osaka is 12.4°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 Osaka Over the Last 30 Days
The water temperature in Osaka 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 Osaka will remain nearly unchanged in the coming days, its value will be 12.1°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 Osaka 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
| Date | Current | Average | Forecast |
|---|---|---|---|
| Feb 15 | 11.7°C | 12.3°C | |
| Feb 16 | 12.1°C | 12.5°C | |
| Feb 17 | 12.6°C | 11.0°C | |
| Feb 18 | 11.3°C | 12.0°C | |
| Feb 19 | 12.0°C | 13.0°C | |
| Feb 20 | 12.9°C | 12.3°C | |
| Feb 21 | 11.7°C | 11.8°C | |
| Feb 22 | 12.4°C | 12.0°C | |
| Feb 23 | 12.3°C | 12.4°C | |
| Feb 24 | 11.5°C | 12.3°C | |
| Feb 25 | 11.5°C | 12.2°C | |
| Feb 26 | 11.5°C | 12.1°C | |
| Feb 27 | 12.8°C | 12.2°C | |
| Feb 28 | 11.8°C | 12.1°C | |
| Mar 1 | 12.5°C | 12.1°C | |
| Mar 2 | 12.5°C | 12.1°C |
Sea Temperature in Osaka Throughout the Year
Throughout the year, the sea temperature in Osaka exceeds 77°F (25°C) for 73 days, exceeds 72°F (22°C) for 130 days, and exceeds 64°F (18°C) for 193 days.
Below is the annual chart of sea temperature changes in the Seto Inland Sea in Osaka.
January
| Minimum | Average | Maximum |
|---|---|---|
| 10°C | 14°C | 18°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| 10°C | 12°C | 14°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| 10°C | 12.5°C | 15°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 14°C | 17°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 17°C | 20°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 17°C | 21°C | 25°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 21°C | 25°C | 29°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 25°C | 27.5°C | 30°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 22°C | 26°C | 30°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 20°C | 23.5°C | 27°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 16°C | 20°C | 24°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 16°C | 20°C |
Monthly Water Temperature Histogram for Seto Inland Sea in Osaka
You can explore detailed data on how the water temperature in Osaka varies each month:
Osaka Weather
FEBRUARY 23
-1°C / 5°C
scattered clouds: 25-50%humidity: 57% | wind: 6 km/h
FEBRUARY 24
1°C / 7°C
clear skyhumidity: 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
Sea Temperature in the Seto Inland Sea in Osaka: General Trends and Swimming Opportunities
Osaka Prefecture, Japan, located in the Kansai region, experiences a humid subtropical climate with four distinct seasons: mild springs, hot and humid summers with the rainy season starting in early June, pleasant autumns, and relatively mild winters often with little snowfall. Being a coastal area, its climate is moderately influenced by the Pacific Ocean, thereby softening extreme temperatures, but it can still experience typhoons during late summer.
Osaka is located in Asia in the Northern Hemisphere at a latitude of 35 degrees, along the shores of the Seto Inland Sea. Osaka lies within the Osaka Prefecture in Japan.
The average annual daytime air temperature in Osaka 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, Osaka 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 Osaka is 19°C (66°F). In January, the water reaches its lowest point of the year at 10°C (50°F), while in August, it peaks at 30°C (86°F). The months suitable for comfortable beach vacations and swimming in the Seto Inland Sea are July, August, and September. During this period, the water temperature stays above 20°C (68°F) and can reach up to 30°C (86°F) on some days.
Geographical Location of Osaka
Frequently Asked Questions About Osaka and its Water Temperatures
What is the current sea temperature in Osaka?
The water temperature today in the Seto Inland Sea in Osaka is 54°F (12.4°C).
In which months is the water temperature in Osaka comfortable for swimming?
The water temperature in the Seto Inland Sea in Osaka is comfortable for swimming and beach vacations in July, August, and September.
What is the water temperature in Osaka during the winter?
The water temperature in the Seto Inland Sea in Osaka during the winter ranges from 10°C to 20°C (50°F to 68°F).
What is the water temperature in Osaka during the spring?
The water temperature in the Seto Inland Sea in Osaka during the spring ranges from 10°C to 20°C (50°F to 68°F).
What is the water temperature in Osaka during the summer?
The water temperature in the Seto Inland Sea in Osaka during the summer ranges from 17°C to 30°C (63°F to 86°F).
What is the water temperature in Osaka during the fall?
The water temperature in the Seto Inland Sea in Osaka during the fall ranges from 16°C to 30°C (61°F to 86°F).
Is it possible to swim in the sea in Osaka year-round?
No, it is not possible to swim in the Seto Inland Sea in Osaka year-round, the months suitable for comfortable swimming are July, August, and September.
What sea temperatures can I expect in Osaka in the next month?
In March, the water temperature in the Seto Inland Sea in Osaka will range between 50°F (10°C) and 59°F (15°C)