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

74.7

°F

June 25, 05:58

Trend:

increasing

Yesterday:

74.3°F

Tomorrow:

75.5°F

Sunrise:

04:46

Sunset:

19:15

Day Length:

14 h. 29 min.

Osaka in June

Minimum:

52.1°F

Average:

55.7°F

Maximum:

60.2°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 74.7°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.1°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 rise 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 77.1°F on 2025, while the historical minimum was 71.6°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 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 76.5°F, with minimum temperature starting at 75.5°F, while the maximum might reach 77.5°F.

Daily water temperature in Osaka

Date Current Year

actual* / forecast**

last year 10 years average
Jun 11 70.7°F 69.5°F 70.5°F
Jun 12 71.9°F 69.6°F 70.7°F
Jun 13 69.9°F 69.7°F 70.6°F
Jun 14 69.4°F 69.8°F 70.9°F
Jun 15 70.7°F 69.9°F 71.5°F
Jun 16 72.2°F 70.0°F 71.6°F
Jun 17 71.6°F 71.7°F 72.1°F
Jun 18 71.9°F 73.5°F 72.2°F
Jun 19 73.4°F 76.9°F 72.6°F
Jun 20 73.2°F 79.2°F 73.0°F
Jun 21 73.9°F 77.6°F 73.0°F
Jun 22 74.5°F 78.2°F 73.0°F
Jun 23 74.9°F 77.7°F 73.3°F
Jun 24 74.3°F 77.4°F 73.2°F
Jun 25 74.7°F 77.1°F 73.6°F
Jun 26 75.5°F 80.7°F 74.4°F
Jun 27 76.1°F 80.9°F 75.0°F
Jun 28 75.9°F 78.9°F 74.8°F
Jun 29 76.1°F 79.5°F 75.0°F
Jun 30 76.9°F 81.0°F 75.8°F
Jul 1 77.5°F 82.9°F 76.4°F
Jul 2 77.5°F 79.5°F 76.4°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

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 74.6°F 5mi
Sakai 74.8°F 8mi
Nishinomiya-hama 74.5°F 10mi
Kobe 73.8°F 18mi
Kyoto 73.1°F 27mi
Ōtsu 73.1°F 30mi
Himeji 72.7°F 46mi
Maizuru 71.5°F 53mi
Tokushima 70.9°F 69mi

* current water temperature in this city

** straight line distance from Osaka