All data are in degrees Fahrenheit

en

Water temperature in Hekinan

Detailed information about the current water temperature in Hekinan. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Hekinan now

72.4

°F

June 3, 03:58

Trend:

stable

Yesterday:

71.5°F

Tomorrow:

71.9°F

Sunrise:

04:39

Sunset:

19:01

Day Length:

14 h. 22 min.

Hekinan in June

Minimum:

53.4°F

Average:

55.6°F

Maximum:

60.9°F

Sea water temperature in Hekinan today

As of now, in Hekinan, the water temperature is 72.4°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 1.5°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 73.2°F on 2022, while the historical minimum was 69.1°F on 2017.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 72.6°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Hekinan

Date Current Year

actual* / forecast**

last year 10 years average
May 20 73.3°F 68.7°F 68.2°F
May 21 71.7°F 68.3°F 68.2°F
May 22 72.2°F 68.0°F 68.4°F
May 23 71.7°F 70.6°F 68.9°F
May 24 70.4°F 70.5°F 69.1°F
May 25 70.7°F 70.3°F 69.5°F
May 26 72.4°F 70.2°F 69.8°F
May 27 73.3°F 69.9°F 69.8°F
May 28 72.9°F 69.8°F 69.7°F
May 29 74.8°F 69.8°F 70.1°F
May 30 71.7°F 69.7°F 69.6°F
May 31 71.0°F 69.7°F 69.5°F
Jun 1 71.6°F 72.2°F 70.1°F
Jun 2 71.5°F 71.0°F 70.0°F
Jun 3 72.4°F 70.8°F 70.9°F
Jun 4 71.9°F 69.2°F 70.4°F
Jun 5 72.2°F 69.2°F 70.7°F
Jun 6 72.3°F 70.5°F 70.8°F
Jun 7 72.6°F 70.4°F 71.1°F
Jun 8 73.0°F 70.5°F 71.5°F
Jun 9 73.1°F 70.4°F 71.5°F
Jun 10 73.1°F 70.3°F 71.6°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Hekinan by month

In Hekinan, the months July through October offer comfortable swimming conditions, which amounts to 127 swimming days.
The warmest water in Hekinan was recorded on August 7, 2025, reaching a 88.2°F. While the coldest temperature occurred on February 16, 2018, dipping to 47.8°F. The average readings by season are 55.4°F in Winter, 60.6°F in Spring, 79.2°F in Summer, and 74.0°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Nagoya 71.1°F 21mi
Tsu 71.8°F 28mi
Hamamatsu 68.6°F 44mi

* current water temperature in this city

** straight line distance from Hekinan