All data are in degrees Fahrenheit

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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

86.0

°F

August 27, 11:07

Trend:

stable

Yesterday:

85.7°F

Tomorrow:

85.7°F

Sunrise:

05:27

Sunset:

18:32

Day Length:

13 h. 5 min.

Osaka in September

Minimum:

50.1°F

Average:

55.0°F

Maximum:

59.9°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 86.0°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 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 86.8°F on 2024, while the historical minimum was 81.2°F on 2018.

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 shows a gradual cooling trend. The average temperature is expected to be 85.4°F, the minimum temperature may reach 84.8°F, and the maximum might stay at 85.8°F.

Daily water temperature in Osaka

Date Current Year

actual* / forecast**

last year 10 years average
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 83.4°F 86.1°F 82.9°F
Aug 21 84.0°F 86.1°F 83.3°F
Aug 22 84.4°F 86.7°F 83.4°F
Aug 23 84.9°F 85.2°F 83.4°F
Aug 24 84.7°F 84.9°F 83.4°F
Aug 25 85.9°F 85.5°F 83.3°F
Aug 26 85.7°F 85.1°F 83.1°F
Aug 27 86.0°F 85.7°F 83.3°F
Aug 28 85.7°F 85.0°F 83.1°F
Aug 29 85.6°F 85.2°F 82.9°F
Aug 30 85.6°F 85.8°F 83.0°F
Aug 31 85.8°F 86.7°F 83.1°F
Sep 1 85.5°F 87.0°F 82.9°F
Sep 2 85.0°F 86.1°F 82.3°F
Sep 3 84.8°F 85.3°F 82.1°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

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 85.8°F 5mi
Sakai 86.1°F 8mi
Nishinomiya-hama 85.5°F 10mi
Kobe 85.0°F 18mi
Kyoto 86.7°F 27mi
Ōtsu 86.7°F 30mi
Himeji 85.7°F 46mi
Maizuru 84.1°F 53mi
Tokushima 82.8°F 69mi

* current water temperature in this city

** straight line distance from Osaka