What is the current water temperature in Osaka?

Q: What is the current water temperature in Osaka?

As of now, in Osaka, the water temperature is 11.1°C. 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.

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.

52.0

°F

March 20, 05:55

Trend:

increasing

Yesterday:

51.7°F

Tomorrow:

52.1°F

Sunrise:

06:03

Sunset:

18:09

Day Length:

12 h. 6 min.

Osaka in March

Minimum:

52.1°F

Average:

55.6°F

Maximum:

60.2°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 52.0°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 1.0°F lower 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 59.9°F on 2016, while the historical minimum was 48.5°F on 2025.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 52.8°F, with minimum temperature starting at 52.1°F, while the maximum might reach 53.5°F.

Daily water temperature in Osaka

Date	Current Year actual* / forecast**	last year	10 years average
Mar 6	48.5°F	50.7°F	51.7°F
Mar 7	49.4°F	49.6°F	51.4°F
Mar 8	50.2°F	50.5°F	51.7°F
Mar 9	50.1°F	49.4°F	51.4°F
Mar 10	50.1°F	48.3°F	51.4°F
Mar 11	49.0°F	49.1°F	51.7°F
Mar 12	50.0°F	49.8°F	52.1°F
Mar 13	50.1°F	51.9°F	52.6°F
Mar 14	49.9°F	48.8°F	52.4°F
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	52.7°F
Mar 20	52.0°F	48.5°F	53.0°F
Mar 21	52.1°F	47.7°F	53.1°F
Mar 22	52.5°F	50.1°F	53.5°F
Mar 23	52.8°F	53.2°F	53.8°F
Mar 24	52.8°F	53.7°F	53.7°F
Mar 25	52.8°F	50.9°F	53.8°F
Mar 26	53.0°F	52.8°F	54.0°F
Mar 27	53.5°F	54.8°F	54.4°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, 58.6°F in Spring, 78.3°F in Summer, and 73.6°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Amagasaki	51.9°F	5mi
Sakai	51.8°F	8mi
Nishinomiya-hama	51.6°F	10mi
Kobe	50.9°F	18mi
Kyoto	50.3°F	27mi
Ōtsu	50.3°F	30mi
Himeji	51.7°F	46mi
Maizuru	51.8°F	53mi
Tokushima	52.4°F	69mi

* current water temperature in this city

** straight line distance from Osaka