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

83.5

°F

July 16, 07:10

Trend:

stable

Yesterday:

83.3°F

Tomorrow:

83.4°F

Sunrise:

04:56

Sunset:

19:11

Day Length:

14 h. 15 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 83.5°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 3.2°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 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 84.5°F on 2025, while the historical minimum was 77.0°F on 2020.

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 minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 84.3°F, with minimum temperature starting at 83.4°F, while the maximum might reach 85.2°F.

Daily water temperature in Osaka

Date Current Year

actual* / forecast**

 last year 10 years average
Jul 2 74.1°F 79.5°F 76.2°F
Jul 3 74.4°F 81.9°F 76.7°F
Jul 4 75.3°F 82.7°F 77.2°F
Jul 5 76.7°F 85.1°F 78.1°F
Jul 6 76.8°F 84.5°F 78.3°F
Jul 7 76.7°F 82.2°F 78.3°F
Jul 8 76.3°F 85.3°F 78.5°F
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 80.1°F
Jul 16 83.5°F 84.5°F 80.3°F
Jul 17 83.4°F 83.7°F 80.2°F
Jul 18 83.9°F 83.6°F 80.7°F
Jul 19 84.1°F 85.2°F 80.9°F
Jul 20 84.4°F 83.4°F 81.2°F
Jul 21 84.3°F 82.9°F 81.1°F
Jul 22 85.2°F 84.8°F 82.0°F
Jul 23 85.1°F 84.9°F 81.9°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 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 83.1°F 5mi
Sakai 84.0°F 8mi
Nishinomiya-hama 82.8°F 10mi
Kobe 81.9°F 18mi
Kyoto 81.8°F 27mi
Ōtsu 81.8°F 30mi
Himeji 81.7°F 46mi
Maizuru 80.1°F 53mi
Tokushima 80.0°F 69mi

* current water temperature in this city

** straight line distance from Osaka