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Tonghae

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

On this page, you will find comprehensive information about the sea temperature in Tonghae 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 Tonghae

12.2°C

TODAY

11.4°C

YESTERDAY

11.3°C

A WEEK AGO

All water temperature data is now available in our official mobile apps — for iOS and Android.

Analysis, Historical Data, and Forecast of Water Temperature

Today sea water temperature in the East China Sea in Tonghae is 12.2°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 East China Sea in Tonghae Over the Last 30 Days

The water temperature in Tonghae 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 Tonghae will rise slightly in the coming days and reach 13.9°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 Tonghae 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 4	11.3°C	12.8°C
May 5	11.2°C	12.8°C
May 6	11.2°C	13.0°C
May 7	11.1°C	13.0°C
May 8	11.2°C	13.0°C
May 9	11.3°C	13.0°C
May 10	11.4°C	13.5°C
May 11	11.9°C	14.5°C
May 12		14.8°C	12.5°C
May 13		14.5°C	12.7°C
May 14		14.8°C	12.9°C
May 15		15.0°C	13.1°C
May 16		15.0°C	13.3°C
May 17		15.3°C	13.5°C
May 18		15.3°C	13.7°C
May 19		15.3°C	13.9°C

* Current - Actual water temperature value

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

*** Forecast - Our water temperature forecast

Sea Temperature in Tonghae Throughout the Year

Throughout the year, the sea temperature in Tonghae exceeds 77°F (25°C) for 19 days, exceeds 72°F (22°C) for 81 days, and exceeds 64°F (18°C) for 158 days.

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

January

Minimum	Average	Maximum
4°C	8.5°C	13°C

February

Minimum	Average	Maximum
3°C	8°C	13°C

March

Minimum	Average	Maximum
3°C	9°C	15°C

April

Minimum	Average	Maximum
7°C	11.5°C	16°C

May

Minimum	Average	Maximum
10°C	14°C	18°C

June

Minimum	Average	Maximum
15°C	19.5°C	24°C

July

Minimum	Average	Maximum
19°C	23.5°C	28°C

August

Minimum	Average	Maximum
21°C	25°C	29°C

September

Minimum	Average	Maximum
17°C	22°C	27°C

October

Minimum	Average	Maximum
13°C	18.5°C	24°C

November

Minimum	Average	Maximum
9°C	16°C	23°C

December

Minimum	Average	Maximum
5°C	11°C	17°C

Monthly Water Temperature Histogram for East China Sea in Tonghae

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

What Beaches Are There In and Around Tonghae?

Mangsan Beach

Mangsan Beach is a 5-stars sandy beach, located in a 6 km (4 miles) radius of Tonghae. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. Mangsan Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Chuam Beach

Chuam Beach is a 5-stars sandy beach, located in a 9 km (6 miles) radius of Tonghae. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. Chuam Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Jeungsan Beach

Jeungsan Beach is a 5-stars sandy beach, located in a 9 km (6 miles) radius of Tonghae. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. Jeungsan Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Samcheok Beach

Samcheok Beach is a 5-stars sandy beach, located in a 10 km (6 miles) radius of Tonghae. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. Samcheok Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Tonghae Weather

MAY 12

11°C / 21°C

broken clouds: 51-84%

humidity: 50% | wind: 6 km/h

MAY 13

10°C / 23°C

scattered clouds: 25-50%

humidity: 54% | wind: 3 km/h

MAY 14

12°C / 17°C

overcast clouds: 85-100%

humidity: 83% | wind: 3 km/h

MAY 15

15°C / 22°C

overcast clouds: 85-100%

humidity: 75% | wind: 3 km/h

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

Original name

동해시

The Local Time

07:27

Time Zone

UTC+9

Sunrise

05:19

Sunset

19:23

Length of the day

14 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.

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

The average annual daytime air temperature in Tonghae 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 -4°C (24°F) is recorded in January, and the maximum is in August, reaching 21°C (69°F).

According to historical data, Tonghae 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 272 mm (10.7 inches) of precipitation, while the driest month is October, which typically has 6 rainy days and only 84 mm (3.3 inches) of precipitation.

The average annual water temperature in East China Sea in Tonghae is 16°C (61°F). In February, the water reaches its lowest point of the year at 3°C (37°F), while in August, it peaks at 29°C (84°F). The month suitable for comfortable beach vacations and swimming in the East China Sea is August. During this month, the water temperature stays above 20°C (68°F) and can reach up to 29°C (84°F) on some days.

Geographical Location of Tonghae

Nearby Cities

Frequently Asked Questions About Tonghae and its Water Temperatures

What is the current sea temperature in Tonghae?

The water temperature today in the East China Sea in Tonghae is 54°F (12.2°C).

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

The water temperature in the East China Sea in Tonghae is comfortable for swimming and beach vacations in August.

What is the water temperature in Tonghae during the winter?

The water temperature in the East China Sea in Tonghae during the winter ranges from 3°C to 17°C (37°F to 63°F).

What is the water temperature in Tonghae during the spring?

The water temperature in the East China Sea in Tonghae during the spring ranges from 3°C to 18°C (37°F to 64°F).

What is the water temperature in Tonghae during the summer?

The water temperature in the East China Sea in Tonghae during the summer ranges from 15°C to 29°C (59°F to 84°F).

What is the water temperature in Tonghae during the fall?

The water temperature in the East China Sea in Tonghae during the fall ranges from 9°C to 27°C (48°F to 81°F).

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

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

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

In June, the water temperature in the East China Sea in Tonghae will range between 59°F (15°C) and 75°F (24°C)