All data are in degrees Fahrenheit

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Japan > Osaka

Water temperature in Osaka

Detailed information about the current water temperature in Osaka. 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 Osaka now

82.8

°F

August 20, 10:35

Trend:

increasing

Yesterday:

82.7°F

Tomorrow:

83.1°F

Sunrise:

05:22

Sunset:

18:41

Day Length:

13 h. 19 min.

Osaka in August

Minimum:

52.9°F

Average:

55.4°F

Maximum:

59.8°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 82.8°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 about the same as 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 rise a bit.

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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 86.1°F on 2025, while the historical minimum was 79.7°F on 2018.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 83.1°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Osaka

Date Current Year

actual* / forecast**

 last year 10 years average
Aug 6 83.9°F 85.7°F 84.2°F
Aug 7 84.3°F 86.8°F 84.1°F
Aug 8 83.3°F 85.4°F 83.7°F
Aug 9 83.0°F 84.8°F 83.2°F
Aug 10 83.7°F 84.4°F 82.7°F
Aug 11 83.7°F 84.4°F 82.7°F
Aug 12 83.1°F 83.4°F 82.7°F
Aug 13 84.1°F 83.1°F 83.0°F
Aug 14 83.0°F 84.1°F 83.0°F
Aug 15 81.8°F 84.9°F 82.9°F
Aug 16 81.9°F 86.6°F 82.9°F
Aug 17 82.2°F 85.3°F 82.7°F
Aug 18 82.7°F 85.0°F 82.6°F
Aug 19 82.7°F 86.4°F 82.8°F
Aug 20 82.8°F 86.1°F 82.9°F
Aug 21 83.1°F 86.1°F 83.2°F
Aug 22 83.3°F 86.7°F 83.3°F
Aug 23 83.2°F 85.2°F 83.3°F
Aug 24 83.2°F 84.9°F 83.2°F
Aug 25 83.0°F 85.5°F 83.1°F
Aug 26 83.0°F 85.1°F 83.1°F
Aug 27 83.2°F 85.7°F 83.3°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 Osaka by month

January

February

March

April

May

June

July

August

September

October

November

December

In Osaka, the months July through October offer comfortable swimming conditions, which amounts to 116 swimming days.
The warmest water in Osaka was recorded on July 24, 2026, reaching a 87.2°F. While the coldest temperature occurred on February 15, 2025, dipping to 42.4°F. The average readings by season are 54.7°F in Winter, 58.7°F in Spring, 78.4°F in Summer, and 73.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Amagasaki 82.9°F 5mi
Sakai 82.8°F 8mi
Nishinomiya-hama 82.8°F 10mi
Kobe 82.4°F 18mi
Kyoto 82.0°F 27mi
Ōtsu 82.0°F 30mi
Himeji 83.3°F 46mi
Maizuru 84.5°F 53mi
Tokushima 82.5°F 69mi

* current water temperature in this city

** straight line distance from Osaka