All data are in degrees Fahrenheit

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Water temperature in Kumamoto

Detailed information about the current water temperature in Kumamoto. 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 Kumamoto now

86.1

°F

August 3, 16:41

Trend:

increasing

Yesterday:

86.1°F

Tomorrow:

86.3°F

Sunrise:

05:32

Sunset:

19:15

Day Length:

13 h. 43 min.

Kumamoto in August

Minimum:

54.3°F

Average:

57.8°F

Maximum:

60.4°F

Sea water temperature in Kumamoto today

As of now, in Kumamoto, the water temperature is 86.1°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 1.7°F higher 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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 88.8°F on 2024, while the historical minimum was 82.5°F on 2018.

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 86.0°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Kumamoto

Date Current Year

actual* / forecast**

last year 10 years average
Jul 20 83.3°F 83.2°F 81.9°F
Jul 21 84.3°F 83.6°F 82.2°F
Jul 22 84.9°F 83.5°F 82.2°F
Jul 23 85.4°F 86.3°F 82.5°F
Jul 24 86.2°F 85.9°F 83.0°F
Jul 25 86.2°F 83.4°F 82.8°F
Jul 26 88.4°F 83.3°F 83.2°F
Jul 27 89.4°F 82.9°F 83.4°F
Jul 28 89.9°F 82.1°F 83.6°F
Jul 29 90.0°F 80.7°F 83.6°F
Jul 30 87.7°F 82.9°F 84.2°F
Jul 31 87.4°F 82.7°F 84.2°F
Aug 1 86.7°F 82.5°F 84.2°F
Aug 2 86.1°F 84.4°F 84.5°F
Aug 3 86.1°F 84.0°F 84.5°F
Aug 4 86.3°F 85.6°F 84.6°F
Aug 5 86.4°F 85.8°F 84.7°F
Aug 6 86.4°F 87.9°F 84.7°F
Aug 7 85.9°F 84.9°F 84.2°F
Aug 8 85.9°F 84.8°F 84.3°F
Aug 9 85.9°F 84.7°F 84.2°F
Aug 10 85.1°F 83.9°F 83.4°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 Kumamoto by month

In Kumamoto, the months June through October offer comfortable swimming conditions, which amounts to 131 swimming days.
The warmest water in Kumamoto was recorded on July 29, 2026, reaching a 90.0°F. While the coldest temperature occurred on February 24, 2018, dipping to 49.7°F. The average readings by season are 57.7°F in Winter, 62.1°F in Spring, 79.5°F in Summer, and 74.8°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Nagasaki 85.2°F 47mi
Beppu 86.0°F 57mi
Fukuoka 86.2°F 57mi
Ōita 84.8°F 60mi

* current water temperature in this city

** straight line distance from Kumamoto