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 11.95°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.

53.5

°F

January 13, 15:37

Trend:

stable

Yesterday:

53.7°F

Tomorrow:

53.5°F

Sunrise:

07:06

Sunset:

17:08

Day Length:

10 h. 2 min.

Osaka in January

Minimum:

53.9°F

Average:

56.2°F

Maximum:

60.2°F

Sea water temperature in Osaka today

As of now, in Osaka, the water temperature is 53.5°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 0.5°F lower than 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 stay about the same.

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 59.2°F on 2016, while the historical minimum was 50.8°F on 2023.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 52.8°F, the minimum temperature may reach 52.4°F, and the maximum might stay at 53.5°F.

Daily water temperature in Osaka

Date	Current Year actual* / forecast**	last year	10 years average
Jan 1	56.3°F	54.5°F	56.2°F
Jan 2	56.2°F	54.9°F	55.9°F
Jan 3	56.1°F	54.1°F	55.6°F
Jan 4	56.3°F	54.4°F	55.6°F
Jan 5	56.5°F	51.4°F	55.4°F
Jan 6	56.8°F	52.1°F	55.7°F
Jan 7	57.0°F	53.1°F	55.8°F
Jan 8	54.2°F	52.9°F	55.4°F
Jan 9	54.6°F	53.7°F	55.0°F
Jan 10	53.9°F	50.7°F	54.6°F
Jan 11	53.8°F	49.6°F	54.4°F
Jan 12	53.7°F	50.3°F	54.2°F
Jan 13	53.5°F	50.9°F	54.0°F
Jan 14	53.5°F	51.0°F	54.0°F
Jan 15	53.2°F	51.3°F	53.7°F
Jan 16	52.7°F	49.3°F	53.2°F
Jan 17	52.7°F	49.9°F	53.2°F
Jan 18	52.4°F	48.5°F	52.9°F
Jan 19	52.4°F	49.2°F	52.9°F
Jan 20	52.7°F	50.0°F	53.1°F
Dec 30	56.4°F	53.0°F	56.6°F
Dec 31	56.4°F	53.6°F	56.4°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 54.9°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	53.4°F	5mi
Sakai	53.6°F	8mi
Nishinomiya-hama	53.1°F	10mi
Kobe	53.2°F	18mi
Kyoto	53.0°F	27mi
Ōtsu	53.0°F	30mi
Himeji	52.6°F	46mi
Maizuru	57.2°F	53mi
Tokushima	56.6°F	69mi

* current water temperature in this city

** straight line distance from Osaka