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

84.4

°F

September 17, 17:41

Trend:

stable

Yesterday:

84.3°F

Tomorrow:

84.3°F

Sunrise:

05:48

Sunset:

18:09

Day Length:

12 h. 21 min.

Okayama in September

Minimum:

50.4°F

Average:

54.0°F

Maximum:

58.8°F

Sea water temperature in Okayama today

As of now, in Okayama, the water temperature is 84.4°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 3.9°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly 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 85.1°F on 2024, while the historical minimum was 76.7°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 83.7°F, the minimum temperature may reach 82.9°F, and the maximum might stay at 84.3°F.

Daily water temperature in Okayama

Date Current Year

actual* / forecast**

last year 10 years average
Sep 3 87.6°F 83.3°F 82.4°F
Sep 4 87.1°F 83.3°F 82.2°F
Sep 5 86.5°F 82.8°F 82.1°F
Sep 6 85.2°F 82.9°F 82.0°F
Sep 7 84.0°F 84.1°F 82.0°F
Sep 8 84.4°F 83.5°F 81.6°F
Sep 9 85.3°F 83.6°F 81.6°F
Sep 10 85.3°F 84.9°F 81.6°F
Sep 11 84.9°F 85.9°F 81.7°F
Sep 12 84.4°F 84.6°F 81.4°F
Sep 13 84.0°F 84.5°F 81.4°F
Sep 14 83.7°F 85.2°F 81.4°F
Sep 15 83.3°F 84.6°F 81.1°F
Sep 16 84.3°F 84.5°F 81.1°F
Sep 17 84.4°F 85.1°F 80.6°F
Sep 18 84.3°F 84.8°F 80.5°F
Sep 19 84.0°F 84.6°F 80.2°F
Sep 20 84.0°F 84.9°F 80.1°F
Sep 21 83.7°F 84.2°F 79.9°F
Sep 22 83.5°F 83.6°F 79.7°F
Sep 23 83.2°F 83.3°F 79.4°F
Sep 24 82.9°F 83.7°F 79.1°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 74.3°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kurashiki 85.2°F 11mi
Takamatsu 84.7°F 23mi
Marugame 85.2°F 27mi
Fukuyama 84.7°F 34mi
Himeji 84.7°F 45mi
Tokushima 81.8°F 54mi
Niihama 85.9°F 60mi
Yonago 84.2°F 64mi
Saijō 84.7°F 66mi

* current water temperature in this city

** straight line distance from Okayama