Water temperature in Sendai Shi

This data the coastal Sendai Shi 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 Sendai Shi

Water temperature in Sendai Shi today is 26.9°C. Based on our historical data over a period of ten years, the warmest water in this day in Sendai Shi was recorded in 2012 and was 26.4°C, and the coldest was recorded in 2009 at 22°C. Sea water temperature in Sendai Shi is expected to drop to 23.6°C in the next 10 days. September average water temperature in Sendai Shi is 23.2°C, the minimum temperature is 19.9°C, and the maximum is 27.5°C.

The swimming season in Sendai Shi lasts from July to October. During those months, Sendai Shi water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Sendai Shi in winter reaches 10.3°C, in spring 10.7°C, in summer the average temperature rises to 22.2°C, and in autumn it is 19.7°C.

Sendai Shi water temperature now

The sea salinity in Sendai Shi is 33.45‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Sendai Shi 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 Sendai Shi. 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 Sendai Shi. Data in table shown for 6 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Sendai Shi

Sendai Shi weather forecast

Current temperature and weather

Data in a table show Sendai Shi temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Sendai Shi.

0-3 h	3-6 h	6-9 h	9-12 h
22.4°C	21.7°C	21.6°C	22.3°C

12-15 h	15-18 h	18-21 h	21-24 h
24.6°C	25.4°C	22.9°C	22°C

Sendai Shi water temperature by month

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

The nearest beaches and cities from Sendai Shi 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
Shiogama	26.4°C	26°C		0.91 m
Niigata-Shi	28.6°C	25°C		0.57 m
Hitachi	25.9°C	24°C		1.21 m
Oarai	25.7°C	24°C		1.17 m
Kashiwazaki	29.1°C	25°C		0.36 m
Joetsu	29.6°C	25°C		0.49 m
Hachinohe	24.3°C	25°C		0.76 m
Hasaki	25.8°C	24°C		1.5 m
Funabashi	28.7°C	24°C		0.61 m
Ichikawa	28.6°C	24°C		0.61 m

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Our report for Sendai Shi 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.