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

80.5

°F

September 17, 15:28

Trend:

decreasing

Yesterday:

80.6°F

Tomorrow:

80.3°F

Sunrise:

05:42

Sunset:

18:03

Day Length:

12 h. 21 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 80.5°F. It's safe to say that the water is comfortably warm for various water-related activities. 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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably 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 2024, while the historical minimum was 77.7°F on 2017.

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 shows a gradual cooling trend. The average temperature is expected to be 79.3°F, the minimum temperature may reach 78.1°F, and the maximum might stay at 80.3°F.

Daily water temperature in Osaka

Date Current Year

actual* / forecast**

last year 10 years average
Sep 3 84.0°F 85.3°F 82.3°F
Sep 4 83.9°F 85.4°F 82.4°F
Sep 5 83.2°F 84.9°F 82.4°F
Sep 6 82.7°F 83.5°F 82.1°F
Sep 7 82.0°F 83.6°F 82.0°F
Sep 8 81.8°F 83.8°F 81.7°F
Sep 9 81.2°F 85.1°F 81.6°F
Sep 10 79.9°F 86.4°F 81.5°F
Sep 11 79.3°F 85.4°F 81.4°F
Sep 12 78.9°F 84.9°F 81.1°F
Sep 13 80.9°F 84.2°F 81.2°F
Sep 14 81.8°F 83.9°F 81.0°F
Sep 15 80.7°F 83.2°F 80.6°F
Sep 16 80.6°F 84.7°F 80.5°F
Sep 17 80.5°F 84.3°F 80.5°F
Sep 18 80.3°F 83.9°F 80.2°F
Sep 19 80.0°F 83.2°F 79.9°F
Sep 20 79.6°F 82.7°F 79.6°F
Sep 21 79.4°F 82.1°F 79.3°F
Sep 22 79.0°F 81.2°F 78.9°F
Sep 23 78.7°F 79.7°F 78.6°F
Sep 24 78.1°F 79.3°F 78.1°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 80.4°F 5mi
Sakai 80.6°F 8mi
Nishinomiya-hama 80.4°F 10mi
Kobe 80.5°F 18mi
Kyoto 77.2°F 27mi
Ōtsu 77.2°F 30mi
Himeji 81.1°F 46mi
Maizuru 80.3°F 53mi
Tokushima 80.3°F 69mi

* current water temperature in this city

** straight line distance from Osaka