All data are in degrees Fahrenheit

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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

63.6

°F

November 25, 00:08

Trend:

decreasing

Yesterday:

64.1°F

Tomorrow:

63.4°F

Sunrise:

06:35

Sunset:

16:42

Day Length:

10 h. 7 min.

Hekinan in November

Minimum:

51.6°F

Average:

54.4°F

Maximum:

59.0°F

Sea water temperature in Hekinan today

As of now, in Hekinan, the water temperature is 63.6°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 1.7°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 66.7°F on 2022, while the historical minimum was 63.8°F on 2023.

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 62.4°F, the minimum temperature may reach 61.4°F, and the maximum might stay at 63.4°F.

Daily water temperature in Hekinan

Date Current Year

actual* / forecast**

last year 10 years average
Nov 11 68.0°F 72.0°F 68.3°F
Nov 12 67.6°F 71.8°F 68.1°F
Nov 13 67.5°F 71.5°F 67.8°F
Nov 14 67.4°F 71.2°F 67.5°F
Nov 15 66.5°F 70.3°F 67.4°F
Nov 16 67.0°F 70.1°F 67.4°F
Nov 17 66.5°F 70.0°F 67.4°F
Nov 18 66.4°F 70.3°F 67.4°F
Nov 19 65.8°F 70.2°F 67.2°F
Nov 20 65.6°F 70.1°F 67.2°F
Nov 21 64.8°F 67.9°F 66.7°F
Nov 22 64.9°F 67.6°F 66.5°F
Nov 23 64.1°F 67.4°F 66.1°F
Nov 24 64.1°F 66.5°F 65.8°F
Nov 25 63.6°F 66.1°F 65.3°F
Nov 26 63.4°F 65.9°F 65.1°F
Nov 27 63.2°F 65.9°F 64.9°F
Nov 28 62.8°F 63.7°F 64.5°F
Nov 29 62.2°F 62.9°F 63.9°F
Nov 30 62.1°F 62.9°F 63.8°F
Dec 1 61.8°F 62.8°F 63.4°F
Dec 2 61.4°F 62.5°F 63.1°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 124 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 56.0°F in Winter, 60.6°F in Spring, 78.9°F in Summer, and 73.8°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Nagoya 64.3°F 21mi
Tsu 62.1°F 28mi
Hamamatsu 65.4°F 44mi

* current water temperature in this city

** straight line distance from Hekinan