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Hiroshima
Water Temperature in the Seto Inland Sea in Hiroshima, Japan: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Hiroshima 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 Hiroshima
14.3°C
TODAY
14.3°C
YESTERDAY
13.5°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Seto Inland Sea in Hiroshima is 14.3°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 Hiroshima Over the Last 30 Days
The water temperature in Hiroshima 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 Hiroshima will remain nearly unchanged in the coming days, its value will be 15.5°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 Hiroshima 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 |
|---|---|---|---|
| May 2 | 13.5°C | 14.5°C | |
| May 3 | 13.9°C | 14.8°C | |
| May 4 | 13.9°C | 15.3°C | |
| May 5 | 14.0°C | 15.3°C | |
| May 6 | 13.7°C | 15.3°C | |
| May 7 | 14.3°C | 15.0°C | |
| May 8 | 14.3°C | 15.3°C | |
| May 9 | 14.3°C | 15.8°C | |
| May 10 | 15.5°C | 14.4°C | |
| May 11 | 16.0°C | 14.6°C | |
| May 12 | 16.0°C | 14.7°C | |
| May 13 | 16.0°C | 14.8°C | |
| May 14 | 16.5°C | 15.0°C | |
| May 15 | 16.8°C | 15.2°C | |
| May 16 | 16.3°C | 15.3°C | |
| May 17 | 16.8°C | 15.5°C |
Sea Temperature in Hiroshima Throughout the Year
Throughout the year, the sea temperature in Hiroshima exceeds 77°F (25°C) for 68 days, exceeds 72°F (22°C) for 135 days, and exceeds 64°F (18°C) for 194 days.
Below is the annual chart of sea temperature changes in the Seto Inland Sea in Hiroshima.
January
| Minimum | Average | Maximum |
|---|---|---|
| 10°C | 13°C | 16°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 |
|---|---|---|
| 13°C | 16.5°C | 20°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 17°C | 21°C | 25°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 21°C | 24.5°C | 28°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 |
|---|---|---|
| 21°C | 24°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 Hiroshima
You can explore detailed data on how the water temperature in Hiroshima varies each month:
What Beaches Are There In and Around Hiroshima?
Bayside Beach Saka
Bayside Beach Saka is a 1-stars sandy beach, located in a 9 km (6 miles) radius of Hiroshima.
Hiroshima Weather
MAY 10
13°C / 18°C
broken clouds: 51-84%humidity: 77% | wind: 2 km/h
MAY 11
12°C / 21°C
overcast clouds: 85-100%humidity: 65% | wind: 2 km/h
MAY 12
12°C / 22°C
clear skyhumidity: 61% | wind: 1 km/h
MAY 13
14°C / 14°C
broken clouds: 51-84%humidity: 75% | wind: 2 km/h
Sea Temperature in the Seto Inland Sea in Hiroshima: General Trends and Swimming Opportunities
The coastal area of Hiroshima Prefecture, Japan, experiences a humid subtropical climate with hot and humid summers, and cool to mild winters. The region is subject to significant rainfall throughout the year, with the highest precipitation occurring around August.
Hiroshima is located in Asia in the Northern Hemisphere at a latitude of 34 degrees, along the shores of the Seto Inland Sea. Hiroshima lies within the Hiroshima Prefecture in Japan.
The average annual daytime air temperature in Hiroshima 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 1°C (34°F) is recorded in January, and the maximum is in August, reaching 23°C (74°F).
According to historical data, Hiroshima 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 265 mm (10.4 inches) of precipitation, while the driest month is November, which typically has 9 rainy days and only 87 mm (3.4 inches) of precipitation.
The average annual water temperature in Seto Inland Sea in Hiroshima 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, September, and October. 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 Hiroshima
Frequently Asked Questions About Hiroshima and its Water Temperatures
What is the current sea temperature in Hiroshima?
The water temperature today in the Seto Inland Sea in Hiroshima is 58°F (14.3°C).
In which months is the water temperature in Hiroshima comfortable for swimming?
The water temperature in the Seto Inland Sea in Hiroshima is comfortable for swimming and beach vacations in July, August, September, and October.
What is the water temperature in Hiroshima during the winter?
The water temperature in the Seto Inland Sea in Hiroshima during the winter ranges from 10°C to 20°C (50°F to 68°F).
What is the water temperature in Hiroshima during the spring?
The water temperature in the Seto Inland Sea in Hiroshima during the spring ranges from 10°C to 20°C (50°F to 68°F).
What is the water temperature in Hiroshima during the summer?
The water temperature in the Seto Inland Sea in Hiroshima during the summer ranges from 17°C to 30°C (63°F to 86°F).
What is the water temperature in Hiroshima during the fall?
The water temperature in the Seto Inland Sea in Hiroshima during the fall ranges from 16°C to 30°C (61°F to 86°F).
Is it possible to swim in the sea in Hiroshima year-round?
No, it is not possible to swim in the Seto Inland Sea in Hiroshima year-round, the months suitable for comfortable swimming are July, August, September, and October.
What sea temperatures can I expect in Hiroshima in the next month?
In June, the water temperature in the Seto Inland Sea in Hiroshima will range between 63°F (17°C) and 77°F (25°C)