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 7.61°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.

45.7

°F

February 13, 17:24

Trend:

decreasing

Yesterday:

46.7°F

Tomorrow:

45.2°F

Sunrise:

06:47

Sunset:

17:38

Day Length:

10 h. 51 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 45.7°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 4.8°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 fall a bit.

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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 58.1°F on 2016, while the historical minimum was 46.2°F on 2025.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 45.8°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Osaka

Date	Current Year actual* / forecast**	last year	10 years average
Jan 30	48.0°F	50.9°F	51.8°F
Jan 31	48.5°F	51.1°F	52.0°F
Feb 1	48.2°F	51.2°F	51.9°F
Feb 2	48.1°F	51.6°F	51.9°F
Feb 3	47.8°F	52.1°F	52.1°F
Feb 4	48.7°F	49.9°F	51.8°F
Feb 5	47.2°F	49.0°F	51.5°F
Feb 6	47.4°F	48.9°F	51.5°F
Feb 7	48.2°F	49.6°F	51.6°F
Feb 8	48.3°F	49.6°F	51.5°F
Feb 9	48.0°F	49.9°F	51.5°F
Feb 10	46.0°F	47.7°F	50.9°F
Feb 11	47.2°F	48.3°F	50.8°F
Feb 12	46.7°F	45.4°F	50.4°F
Feb 13	45.7°F	46.2°F	50.5°F
Feb 14	45.2°F	44.3°F	50.0°F
Feb 15	45.1°F	42.4°F	49.9°F
Feb 16	45.5°F	44.0°F	50.3°F
Feb 17	46.1°F	46.7°F	50.9°F
Feb 18	46.2°F	47.0°F	51.0°F
Feb 19	46.2°F	46.3°F	51.0°F
Feb 20	46.2°F	46.9°F	51.0°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	45.9°F	5mi
Sakai	45.8°F	8mi
Nishinomiya-hama	46.1°F	10mi
Kobe	46.7°F	18mi
Kyoto	48.5°F	27mi
Ōtsu	48.5°F	30mi
Himeji	47.6°F	46mi
Maizuru	52.3°F	53mi
Tokushima	49.4°F	69mi

* current water temperature in this city

** straight line distance from Osaka