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 9.67°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.

49.4

°F

March 12, 14:03

Trend:

increasing

Yesterday:

49.0°F

Tomorrow:

49.9°F

Sunrise:

06:14

Sunset:

18:03

Day Length:

11 h. 49 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 49.4°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 2.9°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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 60.2°F on 2016, while the historical minimum was 48.7°F on 2018.

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 49.8°F, with minimum temperature starting at 49.6°F, while the maximum might reach 50.1°F.

Daily water temperature in Osaka

Date	Current Year actual* / forecast**	last year	10 years average
Feb 26	48.9°F	48.0°F	50.7°F
Feb 27	50.2°F	48.1°F	50.9°F
Feb 28	50.6°F	48.8°F	51.1°F
Mar 1	49.3°F	48.3°F	50.8°F
Mar 2	49.8°F	48.1°F	51.2°F
Mar 3	50.0°F	48.7°F	51.1°F
Mar 4	50.5°F	49.3°F	51.4°F
Mar 5	49.8°F	50.0°F	51.7°F
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	51.9°F
Mar 12	49.4°F	49.8°F	52.3°F
Mar 13	49.9°F	51.9°F	52.8°F
Mar 14	49.7°F	48.8°F	52.6°F
Mar 15	49.6°F	48.5°F	52.6°F
Mar 16	49.8°F	49.2°F	52.7°F
Mar 17	50.0°F	49.6°F	53.0°F
Mar 18	50.1°F	49.5°F	53.0°F
Mar 19	49.7°F	48.4°F	52.7°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	49.4°F	5mi
Sakai	49.5°F	8mi
Nishinomiya-hama	49.6°F	10mi
Kobe	50.3°F	18mi
Kyoto	49.1°F	27mi
Ōtsu	49.1°F	30mi
Himeji	49.7°F	46mi
Maizuru	53.0°F	53mi
Tokushima	51.4°F	69mi

* current water temperature in this city

** straight line distance from Osaka