All data are in degrees Fahrenheit

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Water temperature in Okayama

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

85.2

°F

August 30, 15:31

Trend:

stable

Yesterday:

85.0°F

Tomorrow:

85.1°F

Sunrise:

05:35

Sunset:

18:34

Day Length:

12 h. 59 min.

Okayama in September

Minimum:

50.4°F

Average:

53.6°F

Maximum:

58.8°F

Sea water temperature in Okayama today

As of now, in Okayama, the water temperature is 85.2°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 1.9°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

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 86.2°F on 2025, while the historical minimum was 81.0°F on 2016.

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 maximum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 84.7°F, the minimum temperature may reach 84.2°F, and the maximum might stay at 85.1°F.

Daily water temperature in Okayama

Date Current Year

actual* / forecast**

last year 10 years average
Aug 16 82.4°F 86.0°F 83.0°F
Aug 17 82.6°F 86.3°F 82.6°F
Aug 18 82.3°F 86.1°F 82.5°F
Aug 19 82.5°F 85.0°F 82.5°F
Aug 20 83.0°F 84.7°F 82.6°F
Aug 21 84.3°F 85.9°F 83.1°F
Aug 22 84.5°F 85.6°F 83.2°F
Aug 23 85.5°F 86.0°F 83.3°F
Aug 24 85.4°F 85.4°F 83.3°F
Aug 25 85.4°F 85.4°F 83.2°F
Aug 26 85.7°F 84.9°F 83.4°F
Aug 27 86.2°F 86.0°F 83.4°F
Aug 28 85.3°F 85.5°F 83.3°F
Aug 29 85.0°F 85.3°F 83.0°F
Aug 30 85.2°F 86.2°F 83.2°F
Aug 31 85.1°F 86.4°F 83.1°F
Sep 1 84.9°F 86.5°F 83.0°F
Sep 2 84.7°F 87.2°F 82.8°F
Sep 3 84.7°F 87.6°F 82.7°F
Sep 4 84.6°F 87.1°F 82.7°F
Sep 5 84.3°F 86.5°F 82.4°F
Sep 6 84.2°F 85.2°F 82.3°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 Okayama by month

In Okayama, the months July through October offer comfortable swimming conditions, which amounts to 118 swimming days.
The warmest water in Okayama was recorded on September 3, 2025, reaching a 87.6°F. While the coldest temperature occurred on March 10, 2022, dipping to 44.8°F. The average readings by season are 53.7°F in Winter, 57.4°F in Spring, 76.8°F in Summer, and 74.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kurashiki 84.9°F 11mi
Takamatsu 84.6°F 23mi
Marugame 85.1°F 27mi
Fukuyama 86.4°F 34mi
Himeji 84.5°F 45mi
Tokushima 83.7°F 54mi
Niihama 85.2°F 60mi
Yonago 84.0°F 64mi
Saijō 85.6°F 66mi

* current water temperature in this city

** straight line distance from Okayama