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

82.2

°F

July 13, 14:03

Trend:

increasing

Yesterday:

82.1°F

Tomorrow:

82.3°F

Sunrise:

05:18

Sunset:

19:27

Day Length:

14 h. 9 min.

Kumamoto in July

Minimum:

55.0°F

Average:

57.7°F

Maximum:

60.4°F

Sea water temperature in Kumamoto today

As of now, in Kumamoto, the water temperature is 82.2°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.8°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 notably higher than the average recorded over the past two weeks, indicating a significant warming 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 84.6°F on 2025, while the historical minimum was 77.7°F on 2019.

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 minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 82.8°F, with minimum temperature starting at 82.3°F, while the maximum might reach 83.5°F.

Daily water temperature in Kumamoto

Date Current Year

actual* / forecast**

last year 10 years average
Jun 29 75.2°F 82.2°F 76.9°F
Jun 30 75.6°F 81.9°F 77.2°F
Jul 1 75.6°F 83.0°F 77.4°F
Jul 2 75.0°F 84.0°F 77.6°F
Jul 3 76.2°F 85.2°F 77.9°F
Jul 4 76.0°F 84.1°F 78.2°F
Jul 5 76.2°F 82.2°F 78.3°F
Jul 6 77.2°F 83.2°F 78.6°F
Jul 7 76.9°F 83.3°F 79.2°F
Jul 8 78.3°F 86.0°F 79.8°F
Jul 9 78.2°F 84.8°F 79.7°F
Jul 10 80.8°F 86.0°F 80.3°F
Jul 11 79.7°F 85.4°F 80.1°F
Jul 12 82.1°F 84.9°F 80.3°F
Jul 13 82.2°F 84.6°F 80.4°F
Jul 14 82.3°F 84.2°F 80.6°F
Jul 15 82.5°F 81.6°F 80.7°F
Jul 16 82.8°F 81.7°F 81.0°F
Jul 17 82.9°F 81.9°F 81.2°F
Jul 18 82.9°F 81.5°F 81.1°F
Jul 19 83.0°F 81.1°F 81.2°F
Jul 20 83.5°F 83.2°F 81.7°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 August 2, 2024, reaching a 89.5°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 81.0°F 47mi
Beppu 81.1°F 57mi
Fukuoka 82.1°F 57mi
Ōita 79.3°F 60mi

* current water temperature in this city

** straight line distance from Kumamoto