Search for cities, countries, lakes and rivers
Nagasaki
Water Temperature in the Seto Inland Sea in Nagasaki, Japan: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Nagasaki 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 Nagasaki
13.2°C
TODAY
13.0°C
YESTERDAY
13.1°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Seto Inland Sea in Nagasaki 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 Nagasaki Over the Last 30 Days
The water temperature in Nagasaki 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 Nagasaki will rise slightly in the coming days and reach 14.6°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 Nagasaki 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 | 13.1°C | 15.0°C | |
| Feb 16 | 12.9°C | 15.5°C | |
| Feb 17 | 13.3°C | 15.0°C | |
| Feb 18 | 13.2°C | 15.8°C | |
| Feb 19 | 13.1°C | 15.5°C | |
| Feb 20 | 13.4°C | 14.8°C | |
| Feb 21 | 13.0°C | 15.3°C | |
| Feb 22 | 13.2°C | 15.8°C | |
| Feb 23 | 16.0°C | 13.5°C | |
| Feb 24 | 15.8°C | 13.7°C | |
| Feb 25 | 15.8°C | 13.9°C | |
| Feb 26 | 16.0°C | 14.1°C | |
| Feb 27 | 15.3°C | 14.2°C | |
| Feb 28 | 15.8°C | 14.4°C | |
| Mar 1 | 15.5°C | 14.5°C | |
| Mar 2 | 15.3°C | 14.6°C |
Sea Temperature in Nagasaki Throughout the Year
Throughout the year, the sea temperature in Nagasaki exceeds 77°F (25°C) for 87 days, exceeds 72°F (22°C) for 152 days, and exceeds 64°F (18°C) for 217 days.
Below is the annual chart of sea temperature changes in the Seto Inland Sea in Nagasaki.
January
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 16.5°C | 19°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| 13°C | 15°C | 17°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| 13°C | 15.5°C | 18°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 16.5°C | 19°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 16°C | 19.5°C | 23°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 19°C | 22.5°C | 26°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 22°C | 25°C | 28°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 25°C | 27.5°C | 30°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 24°C | 26.5°C | 29°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 21°C | 24°C | 27°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 18°C | 21.5°C | 25°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 15°C | 18°C | 21°C |
Monthly Water Temperature Histogram for Seto Inland Sea in Nagasaki
You can explore detailed data on how the water temperature in Nagasaki varies each month:
What Beaches Are There In and Around Nagasaki?
Miyazuri Beach Resort
Miyazuri Beach Resort is a 3-stars sandy beach, located in a 8 km (5 miles) radius of Nagasaki. There is parking. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Nagasaki Weather
FEBRUARY 23
-0°C / 6°C
overcast clouds: 85-100%humidity: 59% | wind: 4 km/h
FEBRUARY 24
0°C / 10°C
clear skyhumidity: 68% | wind: 2 km/h
FEBRUARY 25
5°C / 12°C
broken clouds: 51-84%humidity: 66% | wind: 2 km/h
FEBRUARY 26
4°C / 10°C
overcast clouds: 85-100%humidity: 70% | wind: 1 km/h
Sea Temperature in the Seto Inland Sea in Nagasaki: General Trends and Swimming Opportunities
Nagasaki Prefecture, Japan, enjoys a humid subtropical climate, characterized by mild winters and long, hot, and humid summers. Despite high precipitation throughout the year, it sees slightly heavier rainfall from June to September during the rainy season and typhoons.
Nagasaki is located in Asia in the Northern Hemisphere at a latitude of 33 degrees, along the shores of the Seto Inland Sea. Nagasaki lies within the Nagasaki Prefecture in Japan.
The average annual daytime air temperature in Nagasaki is 21°C (70°F), with the average nighttime temperature being 13°C (55°F). The highest average daily temperature occurs in August, reaching 32°C (89°F), while the lowest is in January at 10°C (49°F). As for nighttime temperatures, the minimum average temperature of 3°C (38°F) is recorded in January, and the maximum is in August, reaching 24°C (76°F).
According to historical data, Nagasaki experiences 133 rainy days per year, which accounts for 36 percent of all days in the year. On average, there are 11 rainy days each month. The wettest month is July, with 15 rainy days and 287 mm (11.3 inches) of precipitation, while the driest month is October, which typically has 8 rainy days and only 85 mm (3.3 inches) of precipitation.
The average annual water temperature in Seto Inland Sea in Nagasaki is 21°C (70°F). In February, the water reaches its lowest point of the year at 13°C (55°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 Nagasaki
Frequently Asked Questions About Nagasaki and its Water Temperatures
What is the current sea temperature in Nagasaki?
The water temperature today in the Seto Inland Sea in Nagasaki is 56°F (13.2°C).
In which months is the water temperature in Nagasaki comfortable for swimming?
The water temperature in the Seto Inland Sea in Nagasaki is comfortable for swimming and beach vacations in July, August, September, and October.
What is the water temperature in Nagasaki during the winter?
The water temperature in the Seto Inland Sea in Nagasaki during the winter ranges from 13°C to 21°C (55°F to 70°F).
What is the water temperature in Nagasaki during the spring?
The water temperature in the Seto Inland Sea in Nagasaki during the spring ranges from 13°C to 23°C (55°F to 73°F).
What is the water temperature in Nagasaki during the summer?
The water temperature in the Seto Inland Sea in Nagasaki during the summer ranges from 19°C to 30°C (66°F to 86°F).
What is the water temperature in Nagasaki during the fall?
The water temperature in the Seto Inland Sea in Nagasaki during the fall ranges from 18°C to 29°C (64°F to 84°F).
Is it possible to swim in the sea in Nagasaki year-round?
No, it is not possible to swim in the Seto Inland Sea in Nagasaki year-round, the months suitable for comfortable swimming are July, August, September, and October.
What sea temperatures can I expect in Nagasaki in the next month?
In March, the water temperature in the Seto Inland Sea in Nagasaki will range between 55°F (13°C) and 64°F (18°C)