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

76.9

°F

October 21, 11:36

Trend:

decreasing

Yesterday:

77.3°F

Tomorrow:

76.5°F

Sunrise:

06:14

Sunset:

17:23

Day Length:

11 h. 9 min.

Okayama in October

Minimum:

49.6°F

Average:

53.6°F

Maximum:

58.4°F

Sea water temperature in Okayama today

As of now, in Okayama, the water temperature is 76.9°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.9°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 considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 76.3°F on 2024, while the historical minimum was 71.9°F on 2015.

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 75.7°F, the minimum temperature may reach 74.7°F, and the maximum might stay at 76.5°F.

Daily water temperature in Okayama

Date Current Year

actual* / forecast**

last year 10 years average
Oct 7 79.7°F 79.6°F 77.6°F
Oct 8 79.2°F 79.1°F 77.1°F
Oct 9 79.7°F 78.8°F 77.0°F
Oct 10 79.2°F 78.5°F 76.7°F
Oct 11 79.0°F 78.1°F 76.5°F
Oct 12 79.1°F 78.6°F 76.3°F
Oct 13 78.6°F 78.0°F 75.9°F
Oct 14 78.2°F 78.3°F 75.7°F
Oct 15 77.8°F 78.1°F 75.5°F
Oct 16 79.1°F 77.8°F 75.5°F
Oct 17 78.4°F 78.0°F 75.3°F
Oct 18 78.4°F 78.1°F 75.2°F
Oct 19 77.8°F 77.8°F 74.8°F
Oct 20 77.3°F 77.2°F 74.3°F
Oct 21 76.9°F 76.3°F 73.9°F
Oct 22 76.5°F 76.4°F 73.6°F
Oct 23 76.3°F 76.5°F 73.4°F
Oct 24 76.0°F 76.0°F 73.1°F
Oct 25 75.7°F 75.5°F 72.8°F
Oct 26 75.4°F 75.1°F 72.5°F
Oct 27 75.0°F 74.7°F 72.1°F
Oct 28 74.7°F 74.2°F 71.8°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 116 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 54.1°F in Winter, 57.6°F in Spring, 76.5°F in Summer, and 74.4°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kurashiki 77.3°F 11mi
Takamatsu 76.9°F 23mi
Marugame 76.6°F 27mi
Fukuyama 76.8°F 34mi
Himeji 76.7°F 45mi
Tokushima 76.6°F 54mi
Niihama 76.8°F 60mi
Yonago 73.7°F 64mi
Saijō 76.4°F 66mi

* current water temperature in this city

** straight line distance from Okayama