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

58.9

°F

April 14, 14:22

Trend:

stable

Yesterday:

58.6°F

Tomorrow:

58.6°F

Sunrise:

05:35

Sunset:

18:35

Day Length:

13 h. 0 min.

Okayama in April

Minimum:

51.4°F

Average:

54.1°F

Maximum:

59.1°F

Sea water temperature in Okayama today

As of now, in Okayama, the water temperature is 58.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 2.6°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 fall 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 59.1°F on 2023, while the historical minimum was 53.9°F on 2019.

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 suggests a gradual increase. The average temperature is expected to rise up to 59.4°F, with minimum temperature starting at 58.5°F, while the maximum might reach 60.6°F.

Daily water temperature in Okayama

Date Current Year

actual* / forecast**

 last year 10 years average
Mar 31 54.9°F 53.2°F 54.4°F
Apr 1 54.6°F 53.6°F 54.7°F
Apr 2 54.2°F 54.0°F 54.8°F
Apr 3 54.9°F 53.0°F 54.8°F
Apr 4 55.3°F 51.5°F 54.6°F
Apr 5 57.8°F 50.5°F 55.2°F
Apr 6 57.5°F 53.6°F 55.4°F
Apr 7 57.3°F 53.5°F 55.4°F
Apr 8 58.3°F 52.8°F 56.1°F
Apr 9 57.8°F 53.6°F 55.9°F
Apr 10 58.0°F 50.7°F 56.2°F
Apr 11 58.2°F 51.7°F 56.1°F
Apr 12 58.5°F 53.3°F 56.1°F
Apr 13 58.6°F 53.5°F 56.0°F
Apr 14 58.9°F 54.1°F 56.4°F
Apr 15 58.6°F 52.9°F 56.0°F
Apr 16 58.5°F 52.5°F 55.9°F
Apr 17 58.9°F 52.3°F 56.4°F
Apr 18 59.0°F 52.7°F 56.4°F
Apr 19 59.7°F 56.2°F 57.1°F
Apr 20 60.3°F 56.4°F 57.7°F
Apr 21 60.6°F 57.8°F 58.0°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

January

February

March

April

May

June

July

August

September

October

November

December

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, 57.3°F in Spring, 76.7°F in Summer, and 74.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kurashiki 59.3°F 11mi
Takamatsu 59.0°F 23mi
Marugame 59.0°F 27mi
Fukuyama 58.6°F 34mi
Himeji 57.5°F 45mi
Tokushima 58.7°F 54mi
Niihama 60.5°F 60mi
Yonago 59.3°F 64mi
Saijō 60.1°F 66mi

* current water temperature in this city

** straight line distance from Okayama