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 10.55°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.

51.0

°F

January 27, 15:49

Trend:

stable

Yesterday:

50.8°F

Tomorrow:

50.6°F

Sunrise:

07:00

Sunset:

17:22

Day Length:

10 h. 22 min.

Osaka in February

Minimum:

52.7°F

Average:

55.9°F

Maximum:

59.7°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 51.0°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 2.0°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 fall 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 57.9°F on 2016, while the historical minimum was 51.1°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 shows a gradual cooling trend. The average temperature is expected to be 50.3°F, the minimum temperature may reach 50.2°F, and the maximum might stay at 50.6°F.

Daily water temperature in Osaka

Date	Current Year actual* / forecast**	last year	10 years average
Jan 13	53.8°F	50.9°F	53.9°F
Jan 14	53.2°F	51.0°F	53.9°F
Jan 15	53.4°F	51.3°F	53.6°F
Jan 16	52.7°F	49.3°F	53.1°F
Jan 17	51.7°F	49.9°F	53.0°F
Jan 18	51.7°F	48.5°F	52.8°F
Jan 19	50.9°F	49.2°F	52.7°F
Jan 20	51.4°F	50.0°F	53.0°F
Jan 21	51.1°F	49.3°F	52.7°F
Jan 22	50.9°F	48.7°F	52.5°F
Jan 23	49.6°F	49.4°F	52.7°F
Jan 24	49.3°F	48.1°F	52.7°F
Jan 25	50.6°F	49.8°F	52.6°F
Jan 26	50.8°F	51.3°F	52.8°F
Jan 27	51.0°F	51.1°F	53.0°F
Jan 28	50.6°F	51.2°F	52.6°F
Jan 29	50.2°F	51.1°F	52.3°F
Jan 30	50.2°F	50.9°F	52.2°F
Jan 31	50.3°F	51.1°F	52.4°F
Feb 1	50.2°F	51.2°F	52.3°F
Feb 2	50.2°F	51.6°F	52.2°F
Feb 3	50.5°F	52.1°F	52.5°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 54.8°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	51.3°F	5mi
Sakai	50.6°F	8mi
Nishinomiya-hama	50.9°F	10mi
Kobe	50.6°F	18mi
Kyoto	49.7°F	27mi
Ōtsu	49.7°F	30mi
Himeji	49.6°F	46mi
Maizuru	53.5°F	53mi
Tokushima	52.3°F	69mi

* current water temperature in this city

** straight line distance from Osaka