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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

86.5

°F

July 23, 08:41

Trend:

decreasing

Yesterday:

86.7°F

Tomorrow:

86.5°F

Sunrise:

05:01

Sunset:

19:08

Day Length:

14 h. 7 min.

Osaka in July

Minimum:

53.1°F

Average:

55.8°F

Maximum:

60.2°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 86.5°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 4.6°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 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 86.5°F on 2024, while the historical minimum was 78.6°F on 2016.

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 suggests a gradual increase. The average temperature is expected to rise up to 87.1°F, with minimum temperature starting at 86.5°F, while the maximum might reach 88.0°F.

Daily water temperature in Osaka

Date Current Year

actual* / forecast**

 last year 10 years average
Jul 9 75.0°F 83.2°F 78.2°F
Jul 10 76.0°F 83.3°F 78.3°F
Jul 11 77.8°F 83.3°F 78.7°F
Jul 12 78.0°F 83.0°F 79.1°F
Jul 13 78.0°F 83.6°F 78.9°F
Jul 14 81.3°F 83.4°F 79.5°F
Jul 15 83.3°F 85.6°F 80.3°F
Jul 16 83.0°F 84.5°F 80.5°F
Jul 17 83.7°F 83.7°F 80.5°F
Jul 18 83.3°F 83.6°F 81.0°F
Jul 19 83.7°F 85.2°F 81.2°F
Jul 20 83.7°F 83.4°F 81.4°F
Jul 21 85.4°F 82.9°F 81.5°F
Jul 22 86.7°F 84.8°F 82.0°F
Jul 23 86.5°F 84.9°F 81.9°F
Jul 24 86.5°F 85.7°F 81.8°F
Jul 25 87.0°F 85.0°F 82.4°F
Jul 26 87.1°F 85.9°F 82.4°F
Jul 27 86.7°F 85.6°F 82.1°F
Jul 28 87.1°F 84.6°F 82.5°F
Jul 29 87.5°F 84.8°F 82.8°F
Jul 30 88.0°F 86.2°F 83.4°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 September 1, 2025, reaching a 87.0°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, 78.3°F in Summer, and 73.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Amagasaki 85.9°F 5mi
Sakai 87.0°F 8mi
Nishinomiya-hama 85.3°F 10mi
Kobe 83.2°F 18mi
Kyoto 86.1°F 27mi
Ōtsu 86.1°F 30mi
Himeji 85.4°F 46mi
Maizuru 83.9°F 53mi
Tokushima 82.1°F 69mi

* current water temperature in this city

** straight line distance from Osaka