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Water Temperature in the East China Sea in Seoul, South Korea: Current, Historical Data and Forecast

On this page, you will find comprehensive information about the sea temperature in Seoul in South Korea, 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 Seoul

3.4°C

TODAY

2.7°C

YESTERDAY

2.1°C

A WEEK AGO

Analysis, Historical Data, and Forecast of Water Temperature

Today sea water temperature in the East China Sea in Seoul is 3.4°C. Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters.

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 East China Sea in Seoul Over the Last 30 Days

The water temperature in Seoul 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 Seoul will remain nearly unchanged in the coming days, its value will be 3.3°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 South Korea to enhance accuracy.

Water temperature data for Seoul 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	2.1°C	2.0°C
Feb 16	1.7°C	3.8°C
Feb 17	2.8°C	3.5°C
Feb 18	2.9°C	2.8°C
Feb 19	3.1°C	2.8°C
Feb 20	3.4°C	3.0°C
Feb 21	2.7°C	3.0°C
Feb 22	3.4°C	3.5°C
Feb 23		2.8°C	3.3°C
Feb 24		3.0°C	3.3°C
Feb 25		3.5°C	3.3°C
Feb 26		2.5°C	3.2°C
Feb 27		3.3°C	3.2°C
Feb 28		3.0°C	3.2°C
Mar 1		3.5°C	3.2°C
Mar 2		4.5°C	3.3°C

* Current - Actual water temperature value

** Average - Average water temperature on this day in recent years

*** Forecast - Our water temperature forecast

Sea Temperature in Seoul Throughout the Year

Throughout the year, the sea temperature in Seoul exceeds 77°F (25°C) for 1 days, exceeds 72°F (22°C) for 71 days, and exceeds 64°F (18°C) for 129 days.

Below is the annual chart of sea temperature changes in the East China Sea in Seoul.

January

Minimum	Average	Maximum
-1°C	3.5°C	8°C

February

Minimum	Average	Maximum
1°C	3°C	5°C

March

Minimum	Average	Maximum
0°C	4°C	8°C

April

Minimum	Average	Maximum
4°C	8°C	12°C

May

Minimum	Average	Maximum
8°C	12.5°C	17°C

June

Minimum	Average	Maximum
14°C	18°C	22°C

July

Minimum	Average	Maximum
17°C	21°C	25°C

August

Minimum	Average	Maximum
20°C	23.5°C	27°C

September

Minimum	Average	Maximum
18°C	22.5°C	27°C

October

Minimum	Average	Maximum
14°C	19.5°C	25°C

November

Minimum	Average	Maximum
8°C	14°C	20°C

December

Minimum	Average	Maximum
2°C	8°C	14°C

Monthly Water Temperature Histogram for East China Sea in Seoul

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

Seoul Weather

FEBRUARY 23

-4°C / 3°C

clear sky

humidity: 40% | wind: 2 km/h

FEBRUARY 24

-0°C / 6°C

broken clouds: 51-84%

humidity: 69% | wind: 4 km/h

FEBRUARY 25

0°C / 6°C

clear sky

humidity: 42% | wind: 3 km/h

FEBRUARY 26

1°C / 2°C

clear sky

humidity: 53% | wind: 2 km/h

Sea Temperature in the East China Sea in Seoul: General Trends and Swimming Opportunities

Original name

서울특별시

The Local Time

02:59

Time Zone

UTC+9

Sunrise

07:14

Sunset

18:18

Length of the day

11 h 4 m

The coastal areas of South Korea, such as Busan, have a humid subtropical climate with moderate to heavy rainfall throughout the year and mild winters. Summers are typically hot, humid, and rainy, with monsoons, while the spring and fall seasons bring pleasant, mild temperatures.

Seoul is located in Asia in the Northern Hemisphere at a latitude of 38 degrees, along the shores of the East China Sea. Seoul lies within in South Korea.

The average annual daytime air temperature in Seoul is 19°C (66°F), with the average nighttime temperature being 8°C (46°F). The highest average daily temperature occurs in August, reaching 29°C (85°F), while the lowest is in January at 8°C (47°F). As for nighttime temperatures, the minimum average temperature of -7°C (20°F) is recorded in January, and the maximum is in August, reaching 22°C (71°F).

According to historical data, Seoul experiences 109 rainy days per year, which accounts for 30 percent of all days in the year. On average, there are 9 rainy days each month. The wettest month is August, with 13 rainy days and 318 mm (12.5 inches) of precipitation, while the driest month is October, which typically has 6 rainy days and only 54 mm (2.1 inches) of precipitation.

The average annual water temperature in East China Sea in Seoul is 13°C (55°F). In January, the water reaches its lowest point of the year at -1°C (30°F), while in August, it peaks at 27°C (81°F). In Seoul, the water temperature in the East China Sea never consistently reaches a comfortable level for swimming in any month.

Geographical Location of Seoul

Nearby Cities

Frequently Asked Questions About Seoul and its Water Temperatures

What is the current sea temperature in Seoul?

The water temperature today in the East China Sea in Seoul is 38°F (3.4°C).

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

It cannot be guaranteed that the water temperature in Seoul will be comfortable for swimming in any month of the year.

What is the water temperature in Seoul during the winter?

The water temperature in the East China Sea in Seoul during the winter ranges from -1°C to 14°C (30°F to 57°F).

What is the water temperature in Seoul during the spring?

The water temperature in the East China Sea in Seoul during the spring ranges from 0°C to 17°C (32°F to 63°F).

What is the water temperature in Seoul during the summer?

The water temperature in the East China Sea in Seoul during the summer ranges from 14°C to 27°C (57°F to 81°F).

What is the water temperature in Seoul during the fall?

The water temperature in the East China Sea in Seoul during the fall ranges from 8°C to 27°C (46°F to 81°F).

Is it possible to swim in the sea in Seoul at any time of the year?

The East China Sea in Seoul is quite cool, and swimming is only possible in June, July, August, September, and October when the water temperature reaches 21°C (70°F).

Is Seoul a popular tourist destination for beach vacations?

Seoul has a moderate level of popularity for beach vacations; while it does receive some visitors, it is not among the top seaside destinations, as other locations may offer more favorable conditions.

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

In March, the water temperature in the East China Sea in Seoul will range between 32°F (0°C) and 46°F (8°C)