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

86.7

°F

August 31, 19:17

Trend:

decreasing

Yesterday:

87.1°F

Tomorrow:

86.5°F

Sunrise:

05:51

Sunset:

18:44

Day Length:

12 h. 53 min.

Kumamoto in September

Minimum:

52.2°F

Average:

57.6°F

Maximum:

60.5°F

Sea water temperature in Kumamoto today

As of now, in Kumamoto, the water temperature is 86.7°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 3.0°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 fall a bit.

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 85.9°F on 2023, while the historical minimum was 79.7°F on 2016.

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. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 85.8°F, the minimum temperature may reach 85.1°F, and the maximum might stay at 86.5°F.

Daily water temperature in Kumamoto

Date Current Year

actual* / forecast**

last year 10 years average
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 84.0°F
Aug 25 87.5°F 86.0°F 84.1°F
Aug 26 86.8°F 86.0°F 84.2°F
Aug 27 87.0°F 85.1°F 84.1°F
Aug 28 87.3°F 84.4°F 83.9°F
Aug 29 87.4°F 85.3°F 84.0°F
Aug 30 87.1°F 85.8°F 84.2°F
Aug 31 86.7°F 85.6°F 83.7°F
Sep 1 86.5°F 85.8°F 83.5°F
Sep 2 86.4°F 87.9°F 83.4°F
Sep 3 86.0°F 86.5°F 83.0°F
Sep 4 85.7°F 85.9°F 82.7°F
Sep 5 85.5°F 85.5°F 82.5°F
Sep 6 85.5°F 85.4°F 82.5°F
Sep 7 85.1°F 85.0°F 82.1°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 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, 79.6°F in Summer, and 74.8°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Nagasaki 84.0°F 47mi
Beppu 84.6°F 57mi
Fukuoka 84.7°F 57mi
Ōita 84.4°F 60mi

* current water temperature in this city

** straight line distance from Kumamoto