What is the current water temperature in Ōtsu?

Q: What is the current water temperature in Ōtsu?

As of now, in Ōtsu, the water temperature is 15.21°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 > Ōtsu

Water temperature in Ōtsu

Detailed information about the current water temperature in Ōtsu. 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.

59.4

°F

April 14, 15:25

Trend:

stable

Yesterday:

59.2°F

Tomorrow:

59.1°F

Sunrise:

05:27

Sunset:

18:28

Day Length:

13 h. 1 min.

Ōtsu in April

Minimum:

52.3°F

Average:

54.4°F

Maximum:

55.7°F

Sea water temperature in Ōtsu today

As of now, in Ōtsu, the water temperature is 59.4°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 higher 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 notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 58.8°F on 2021, while the historical minimum was 54.0°F on 2017.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 60.1°F, with minimum temperature starting at 59.1°F, while the maximum might reach 61.1°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Mar 31	53.5°F	53.9°F	53.7°F
Apr 1	53.9°F	53.8°F	54.1°F
Apr 2	57.6°F	53.8°F	54.4°F
Apr 3	55.4°F	55.0°F	54.4°F
Apr 4	55.3°F	54.4°F	54.7°F
Apr 5	55.3°F	53.2°F	54.7°F
Apr 6	58.3°F	53.3°F	54.8°F
Apr 7	58.2°F	54.0°F	55.1°F
Apr 8	58.6°F	55.1°F	55.9°F
Apr 9	57.3°F	55.1°F	56.3°F
Apr 10	57.4°F	55.3°F	56.4°F
Apr 11	59.5°F	55.6°F	56.3°F
Apr 12	59.2°F	57.3°F	56.6°F
Apr 13	59.2°F	57.3°F	56.3°F
Apr 14	59.4°F	58.0°F	56.4°F
Apr 15	59.1°F	55.2°F	56.1°F
Apr 16	59.4°F	56.3°F	56.5°F
Apr 17	59.9°F	56.0°F	56.9°F
Apr 18	59.9°F	56.1°F	57.0°F
Apr 19	60.5°F	59.4°F	57.6°F
Apr 20	60.6°F	58.8°F	57.7°F
Apr 21	61.1°F	58.8°F	58.2°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 Ōtsu by month

In Ōtsu, the months July through September offer comfortable swimming conditions, which amounts to 106 swimming days.

The warmest water in Ōtsu was recorded on August 3, 2025, reaching a 89.2°F. While the coldest temperature occurred on January 30, 2025, dipping to 43.9°F. The average readings by season are 53.6°F in Winter, 57.2°F in Spring, 77.4°F in Summer, and 71.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kyoto	59.4°F	7mi
Osaka	61.7°F	30mi
Amagasaki	61.6°F	32mi
Nishinomiya-hama	61.4°F	36mi
Sakai	61.8°F	37mi
Tsu	59.4°F	41mi
Maizuru	58.5°F	43mi
Kobe	60.5°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu