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

82.0

°F

August 17, 17:54

Trend:

stable

Yesterday:

82.9°F

Tomorrow:

82.3°F

Sunrise:

05:41

Sunset:

19:01

Day Length:

13 h. 20 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 82.0°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.9°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 rise 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 88.1°F on 2020, while the historical minimum was 80.9°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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 82.0°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
Aug 3 87.1°F 84.0°F 84.7°F
Aug 4 86.7°F 85.6°F 84.8°F
Aug 5 85.4°F 85.8°F 84.8°F
Aug 6 84.3°F 87.9°F 84.7°F
Aug 7 84.5°F 84.9°F 84.2°F
Aug 8 83.0°F 84.8°F 84.2°F
Aug 9 83.6°F 84.7°F 84.1°F
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 84.0°F
Aug 18 82.3°F 87.2°F 84.2°F
Aug 19 82.1°F 86.7°F 84.1°F
Aug 20 81.9°F 87.1°F 83.8°F
Aug 21 82.1°F 86.8°F 84.0°F
Aug 22 82.0°F 85.8°F 83.9°F
Aug 23 81.8°F 85.8°F 83.8°F
Aug 24 81.8°F 85.3°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 82.7°F 47mi
Beppu 80.9°F 57mi
Fukuoka 82.0°F 57mi
Ōita 80.2°F 60mi

* current water temperature in this city

** straight line distance from Kumamoto