Water temperature in Nagato

This data the coastal Nagato 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 Nagato

Water temperature in Nagato today is 26.6°C. Based on our historical data over a period of ten years, the warmest water in this day in Nagato was recorded in 2023 and was 26.3°C, and the coldest was recorded in 2011 at 23.3°C. Sea water temperature in Nagato is expected to drop to 23.6°C in the next 10 days. September average water temperature in Nagato is 25.8°C, the minimum temperature is 23.2°C, and the maximum is 29.6°C.

The swimming season in Nagato lasts from June to November. During those months, Nagato water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Nagato in winter reaches 15.2°C, in spring 15.4°C, in summer the average temperature rises to 24.7°C, and in autumn it is 23°C.

Nagato water temperature now

The sea salinity in Nagato is 33.73‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Nagato 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 Nagato. 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 Nagato. Data in table shown for 27 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Nagato

Nagato weather forecast

Current temperature and weather

Data in a table show Nagato temperature today (27 September 2025). For more information and forecast for a few days, go to the weather forecast Nagato.

0-3 h	3-6 h	6-9 h	9-12 h
21.3°C	20.8°C	21°C	22.1°C

12-15 h	15-18 h	18-21 h	21-24 h
23°C	23.3°C	21.5°C	19.9°C

Nagato water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Nagato. 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 Nagato 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 Nagato

The nearest beaches and cities from Nagato 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
Ube	26.2°C	23°C		0.05 m
Shimonoseki	26.9°C	23°C		0.13 m
Tokuyama	25.6°C	23°C		0.1 m
Shiida	27°C	24°C		0.07 m
Nakatsu	26.9°C	24°C		0.07 m
Yanai	25°C	23°C		0.14 m
Ono	26.1°C	25°C		0.07 m
Fukuma	26.8°C	24°C		0.39 m
Iwakuni	26.2°C	23°C		0.2 m
Miyajima	26°C	25°C		0.08 m

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Our report for Nagato 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.