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

80.8

°F

September 13, 18:13

Trend:

increasing

Yesterday:

80.7°F

Tomorrow:

80.8°F

Sunrise:

05:45

Sunset:

18:15

Day Length:

12 h. 30 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 80.8°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.0°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 stay about the same.

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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 84.5°F on 2024, while the historical minimum was 79.5°F on 2021.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 80.3°F, the minimum temperature may reach 79.9°F, and the maximum might stay at 80.8°F.

Daily water temperature in Okayama

Date Current Year

actual* / forecast**

last year 10 years average
Aug 30 84.7°F 86.2°F 83.3°F
Aug 31 86.3°F 86.4°F 83.4°F
Sep 1 85.4°F 86.5°F 83.2°F
Sep 2 85.5°F 87.2°F 83.0°F
Sep 3 84.8°F 87.6°F 82.9°F
Sep 4 84.7°F 87.1°F 82.8°F
Sep 5 84.0°F 86.5°F 82.5°F
Sep 6 83.6°F 85.2°F 82.4°F
Sep 7 83.0°F 84.0°F 82.4°F
Sep 8 82.7°F 84.4°F 82.0°F
Sep 9 82.1°F 85.3°F 82.0°F
Sep 10 82.0°F 85.3°F 82.0°F
Sep 11 81.2°F 84.9°F 82.1°F
Sep 12 80.7°F 84.4°F 81.7°F
Sep 13 80.8°F 84.0°F 81.8°F
Sep 14 80.8°F 83.7°F 81.8°F
Sep 15 80.5°F 83.3°F 81.4°F
Sep 16 80.5°F 84.3°F 81.4°F
Sep 17 80.3°F 84.4°F 81.3°F
Sep 18 80.4°F 85.2°F 81.3°F
Sep 19 80.0°F 84.5°F 81.0°F
Sep 20 79.9°F 84.3°F 80.9°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 81.7°F 11mi
Takamatsu 80.5°F 23mi
Marugame 81.2°F 27mi
Fukuyama 81.4°F 34mi
Himeji 81.2°F 45mi
Tokushima 80.5°F 54mi
Niihama 81.5°F 60mi
Yonago 78.9°F 64mi
Saijō 80.7°F 66mi

* current water temperature in this city

** straight line distance from Okayama