Water temperature in Hachinohe

This data the coastal Hachinohe 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 Hachinohe

Water temperature in Hachinohe today is 21.7°C. Based on our historical data over a period of ten years, the warmest water in this day in Hachinohe was recorded in 2023 and was 22.2°C, and the coldest was recorded in 2008 at 19.2°C. Sea water temperature in Hachinohe is expected to drop to 19.6°C in the next 10 days. September average water temperature in Hachinohe is 21.5°C, the minimum temperature is 18.4°C, and the maximum is 26.2°C.

The swimming season in Hachinohe lasts from August to September. During those months, Hachinohe water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Hachinohe in winter reaches 9.5°C, in spring 8.5°C, in summer the average temperature rises to 18.4°C, and in autumn it is 18.4°C.

Hachinohe water temperature now

The sea salinity in Hachinohe is 33.82‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Hachinohe 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 Hachinohe. 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 Hachinohe. 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 Hachinohe

Hachinohe weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
17.6°C	16.5°C	15.9°C	22.3°C

12-15 h	15-18 h	18-21 h	21-24 h
25.1°C	24.6°C	19°C	16.7°C

Hachinohe water temperature by month

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

The nearest beaches and cities from Hachinohe 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
Miyako	21.8°C	23°C		2.01 m
Yamada	21.9°C	23°C		2.2 m
Kamaishi	21.7°C	23°C		2.07 m
Kamiiso	22°C	21°C		1.27 m
Ofunato	22.3°C	24°C		1.89 m
Muroran	20.5°C	20°C		1.24 m
Noboribetsu	20.2°C	20°C		1.37 m
Ishinomaki	23.4°C	26°C		0.98 m
Tomakomai	18.6°C	22°C		1.02 m
Matsushima	23.5°C	27°C		1.44 m

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Our report for Hachinohe 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.