Water temperature in Najin

This data the coastal Najin sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Najin

Water temperature in Najin today is 20.5°C. Based on our historical data over a period of ten years, the warmest water in this day in Najin was recorded in 2021 and was 20.2°C, and the coldest was recorded in 2009 at 17.6°C. Sea water temperature in Najin is expected to drop to 17.3°C in the next 10 days. September average water temperature in Najin is 19.9°C, the minimum temperature is 16.1°C, and the maximum is 23.7°C.

The swimming season in Najin lasts from July to September. During those months, Najin water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Najin in winter reaches 3.3°C, in spring 5°C, in summer the average temperature rises to 19.1°C, and in autumn it is 15.7°C.

Najin water temperature now

The sea salinity in Najin is 32.82‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Najin for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Najin. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Najin. Data in table shown for 26 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Najin

Najin weather forecast

Current temperature and weather

Data in a table show Najin temperature today (26 September 2025). For more information and forecast for a few days, go to the weather forecast Najin.

0-3 h	3-6 h	6-9 h	9-12 h
19.5°C	18.7°C	17.1°C	20.7°C

12-15 h	15-18 h	18-21 h	21-24 h
22.9°C	24°C	19.7°C	17.4°C

Najin water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Najin. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Najin on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Najin

The nearest beaches and cities from Najin with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Rason	20.5°C	24°C		0.34 m
Sonbong	20.6°C	24°C		0.36 m
Wonsan	21.9°C	23°C		0.18 m
Sokcho	22.5°C	22°C		0.26 m
Gangneung	22.5°C	23°C		0.25 m
Yongpyong	22.4°C	23°C		0.27 m
Tonghae	22.5°C	23°C		0.27 m
Nampo	22.8°C	24°C		0.16 m
Goyang	22.1°C	27°C		0.11 m
Haeju	22.8°C	25°C		0.09 m

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Our report for Najin is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.