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

80.7

°F

July 19, 14:34

Trend:

increasing

Yesterday:

80.5°F

Tomorrow:

81.4°F

Sunrise:

05:04

Sunset:

19:16

Day Length:

14 h. 12 min.

Okayama in July

Minimum:

51.0°F

Average:

54.2°F

Maximum:

58.9°F

Sea water temperature in Okayama today

As of now, in Okayama, the water temperature is 80.7°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 3.0°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 rise 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 80.2°F on 2025, while the historical minimum was 75.8°F on 2020.

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. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 82.1°F, with minimum temperature starting at 81.2°F, while the maximum might reach 82.7°F.

Daily water temperature in Okayama

Date Current Year

actual* / forecast**

last year 10 years average
Jul 5 74.5°F 78.3°F 75.4°F
Jul 6 74.4°F 80.4°F 76.1°F
Jul 7 74.4°F 79.9°F 76.3°F
Jul 8 74.7°F 79.7°F 76.4°F
Jul 9 75.2°F 81.9°F 76.5°F
Jul 10 76.4°F 82.4°F 76.7°F
Jul 11 76.6°F 82.3°F 76.7°F
Jul 12 76.0°F 81.7°F 76.6°F
Jul 13 75.9°F 81.5°F 76.4°F
Jul 14 78.5°F 81.6°F 76.9°F
Jul 15 79.3°F 81.4°F 77.2°F
Jul 16 79.2°F 80.3°F 77.0°F
Jul 17 79.9°F 81.0°F 77.5°F
Jul 18 80.5°F 80.4°F 77.5°F
Jul 19 80.7°F 80.2°F 77.8°F
Jul 20 81.4°F 81.4°F 78.5°F
Jul 21 81.2°F 81.5°F 78.3°F
Jul 22 81.8°F 82.7°F 78.9°F
Jul 23 82.2°F 82.9°F 79.3°F
Jul 24 82.4°F 83.2°F 79.4°F
Jul 25 82.6°F 83.2°F 79.7°F
Jul 26 82.7°F 83.2°F 79.8°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, 76.7°F in Summer, and 74.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kurashiki 80.2°F 11mi
Takamatsu 77.8°F 23mi
Marugame 79.2°F 27mi
Fukuyama 81.4°F 34mi
Himeji 81.9°F 45mi
Tokushima 80.5°F 54mi
Niihama 84.7°F 60mi
Yonago 80.2°F 64mi
Saijō 82.4°F 66mi

* current water temperature in this city

** straight line distance from Okayama