All data are in degrees Fahrenheit

en
Japan > Okayama

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

60.5

°F

December 10, 06:05

Trend:

decreasing

Yesterday:

60.9°F

Tomorrow:

60.2°F

Sunrise:

07:00

Sunset:

16:54

Day Length:

9 h. 54 min.

Okayama in December

Minimum:

50.4°F

Average:

53.6°F

Maximum:

59.0°F

Sea water temperature in Okayama today

As of now, in Okayama, the water temperature is 60.5°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 0.5°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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 61.3°F on 2018, while the historical minimum was 58.4°F on 2017.

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 shows a gradual cooling trend. The average temperature is expected to be 59.8°F, the minimum temperature may reach 59.3°F, and the maximum might stay at 60.2°F.

Daily water temperature in Okayama

Date Current Year

actual* / forecast**

 last year 10 years average
Nov 26 63.9°F 66.1°F 64.5°F
Nov 27 63.4°F 65.8°F 64.1°F
Nov 28 63.5°F 65.0°F 63.9°F
Nov 29 63.5°F 65.4°F 63.6°F
Nov 30 63.3°F 64.0°F 63.2°F
Dec 1 64.0°F 63.9°F 63.2°F
Dec 2 63.8°F 63.4°F 62.9°F
Dec 3 63.7°F 62.6°F 62.6°F
Dec 4 62.5°F 62.4°F 62.3°F
Dec 5 61.4°F 62.1°F 62.0°F
Dec 6 61.4°F 61.4°F 61.8°F
Dec 7 60.9°F 60.5°F 61.4°F
Dec 8 61.2°F 60.0°F 60.9°F
Dec 9 60.9°F 59.9°F 60.4°F
Dec 10 60.5°F 59.6°F 60.0°F
Dec 11 60.2°F 59.5°F 59.7°F
Dec 12 60.2°F 59.5°F 59.7°F
Dec 13 59.8°F 59.5°F 59.3°F
Dec 14 59.7°F 59.5°F 59.2°F
Dec 15 59.6°F 59.5°F 59.1°F
Dec 16 59.6°F 58.9°F 59.1°F
Dec 17 59.3°F 57.5°F 58.8°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

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 117 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 58.5°F 11mi
Takamatsu 59.6°F 23mi
Marugame 60.2°F 27mi
Fukuyama 60.8°F 34mi
Himeji 61.7°F 45mi
Tokushima 60.2°F 54mi
Niihama 60.8°F 60mi
Yonago 63.8°F 64mi
Saijō 61.5°F 66mi

* current water temperature in this city

** straight line distance from Okayama