Water temperature in Narashino

This data the coastal Narashino 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 Narashino

Water temperature in Narashino today is 25.6°C. Based on our historical data over a period of ten years, the warmest water in this day in Narashino was recorded in 2023 and was 27.4°C, and the coldest was recorded in 2014 at 22.5°C. Sea water temperature in Narashino is expected to drop to 23°C in the next 10 days. September average water temperature in Narashino is 25.6°C, the minimum temperature is 22.5°C, and the maximum is 29.9°C.

The swimming season in Narashino lasts from June to October. During those months, Narashino water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Narashino in winter reaches 13.5°C, in spring 15.9°C, in summer the average temperature rises to 25.1°C, and in autumn it is 22°C.

Narashino water temperature now

The sea salinity in Narashino is 30.81‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Narashino 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 Narashino. 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 Narashino. 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 Narashino

Narashino weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
23.9°C	22.6°C	22.3°C	22.6°C

12-15 h	15-18 h	18-21 h	21-24 h
23.9°C	25.5°C	24.3°C	23.3°C

Narashino water temperature by month

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

The nearest beaches and cities from Narashino 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
Shinagawa Ku	25.2°C	24°C		0.08 m
Kawasaki	25°C	24°C		0.11 m
Futtsu	24.5°C	22°C		0.14 m
Yokosuka	24.8°C	23°C		0.24 m
Kamakura	24.8°C	22°C		0.3 m
Hayama	24.6°C	22°C		0.24 m
Fujisawa	25°C	22°C		0.4 m
Hasaki	24.6°C	24°C		1.3 m
Miura	24.8°C	23°C		0.4 m
Enoshima	24.9°C	22°C		0.36 m

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Our report for Narashino 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.