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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

53.6

°F

March 29, 20:48

Trend:

increasing

Yesterday:

52.7°F

Tomorrow:

53.9°F

Sunrise:

05:50

Sunset:

18:16

Day Length:

12 h. 26 min.

Osaka in April

Minimum:

50.6°F

Average:

55.6°F

Maximum:

60.2°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 53.6°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.4°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable 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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 59.8°F on 2016, while the historical minimum was 52.4°F on 2024.

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 54.3°F, with minimum temperature starting at 53.9°F, while the maximum might reach 54.5°F.

Daily water temperature in Osaka

Date Current Year

actual* / forecast**

 last year 10 years average
Mar 15 49.2°F 48.5°F 52.3°F
Mar 16 49.4°F 49.2°F 52.4°F
Mar 17 50.6°F 49.6°F 52.8°F
Mar 18 50.7°F 49.5°F 52.8°F
Mar 19 51.7°F 48.4°F 52.6°F
Mar 20 49.2°F 48.5°F 52.6°F
Mar 21 51.2°F 47.7°F 52.9°F
Mar 22 49.9°F 50.1°F 53.2°F
Mar 23 51.2°F 53.2°F 53.5°F
Mar 24 52.8°F 53.7°F 53.7°F
Mar 25 53.1°F 50.9°F 53.7°F
Mar 26 54.8°F 52.8°F 54.1°F
Mar 27 52.5°F 54.8°F 54.2°F
Mar 28 52.7°F 55.4°F 54.2°F
Mar 29 53.6°F 56.3°F 55.0°F
Mar 30 53.9°F 56.5°F 55.4°F
Mar 31 53.9°F 56.6°F 55.3°F
Apr 1 54.4°F 56.7°F 55.8°F
Apr 2 54.5°F 56.7°F 55.9°F
Apr 3 54.5°F 56.2°F 56.0°F
Apr 4 54.5°F 57.2°F 55.9°F
Apr 5 54.5°F 54.4°F 55.9°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, 58.6°F in Spring, 78.3°F in Summer, and 73.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Amagasaki 53.5°F 5mi
Sakai 53.7°F 8mi
Nishinomiya-hama 53.4°F 10mi
Kobe 53.0°F 18mi
Kyoto 52.8°F 27mi
Ōtsu 52.8°F 30mi
Himeji 52.6°F 46mi
Maizuru 53.0°F 53mi
Tokushima 53.6°F 69mi

* current water temperature in this city

** straight line distance from Osaka