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

87.4

°F

August 24, 19:16

Trend:

increasing

Yesterday:

86.6°F

Tomorrow:

87.4°F

Sunrise:

05:46

Sunset:

18:53

Day Length:

13 h. 7 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 87.4°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 3.7°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 85.7°F on 2024, while the historical minimum was 80.7°F on 2021.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 87.4°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
Aug 10 83.4°F 84.0°F 83.4°F
Aug 11 82.8°F 83.7°F 83.1°F
Aug 12 81.0°F 83.4°F 83.1°F
Aug 13 80.6°F 82.9°F 83.4°F
Aug 14 82.5°F 84.7°F 84.1°F
Aug 15 83.0°F 84.1°F 84.1°F
Aug 16 82.9°F 86.0°F 83.9°F
Aug 17 82.0°F 86.6°F 83.8°F
Aug 18 83.2°F 87.2°F 84.1°F
Aug 19 83.8°F 86.7°F 84.0°F
Aug 20 83.9°F 87.1°F 83.8°F
Aug 21 84.4°F 86.8°F 84.0°F
Aug 22 85.8°F 85.8°F 84.1°F
Aug 23 86.6°F 85.8°F 84.0°F
Aug 24 87.4°F 85.3°F 83.7°F
Aug 25 87.4°F 86.0°F 83.7°F
Aug 26 87.6°F 86.0°F 83.9°F
Aug 27 87.5°F 85.1°F 83.8°F
Aug 28 87.2°F 84.4°F 83.6°F
Aug 29 87.4°F 85.3°F 83.7°F
Aug 30 87.5°F 85.8°F 83.9°F
Aug 31 87.3°F 85.6°F 83.7°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 85.4°F 47mi
Beppu 83.6°F 57mi
Fukuoka 86.1°F 57mi
Ōita 84.7°F 60mi

* current water temperature in this city

** straight line distance from Kumamoto