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 22.58°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

72.6

°F

July 1, 11:25

Trend:

increasing

Yesterday:

72.5°F

Tomorrow:

73.3°F

Sunrise:

04:46

Sunset:

19:14

Day Length:

14 h. 28 min.

Ōtsu in July

Minimum:

52.2°F

Average:

54.0°F

Maximum:

55.5°F

Sea water temperature in Ōtsu today

As of now, in Ōtsu, the water temperature is 72.6°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 2.6°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 closely matches the previous two weeks' average, indicating a stable trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 82.1°F on 2025, while the historical minimum was 71.0°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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 73.6°F, with minimum temperature starting at 73.0°F, while the maximum might reach 74.8°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Jun 17	72.7°F	70.2°F	70.9°F
Jun 18	72.1°F	71.1°F	70.7°F
Jun 19	74.1°F	72.2°F	71.4°F
Jun 20	73.4°F	73.8°F	71.6°F
Jun 21	73.1°F	73.0°F	71.4°F
Jun 22	72.8°F	72.8°F	71.7°F
Jun 23	72.7°F	77.3°F	72.5°F
Jun 24	72.6°F	76.8°F	72.8°F
Jun 25	72.6°F	76.4°F	73.2°F
Jun 26	72.6°F	78.0°F	74.2°F
Jun 27	72.6°F	78.7°F	74.2°F
Jun 28	72.7°F	78.6°F	74.4°F
Jun 29	72.6°F	79.3°F	74.8°F
Jun 30	72.5°F	81.2°F	75.1°F
Jul 1	72.6°F	82.1°F	75.3°F
Jul 2	73.3°F	81.2°F	75.9°F
Jul 3	73.0°F	82.6°F	75.6°F
Jul 4	73.4°F	82.6°F	76.0°F
Jul 5	73.5°F	81.3°F	76.1°F
Jul 6	73.4°F	81.2°F	76.0°F
Jul 7	74.0°F	83.1°F	76.6°F
Jul 8	74.8°F	85.5°F	77.4°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 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, 57.4°F in Spring, 77.5°F in Summer, and 71.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kyoto	72.6°F	7mi
Osaka	75.0°F	30mi
Amagasaki	74.6°F	32mi
Nishinomiya-hama	74.8°F	36mi
Sakai	75.5°F	37mi
Tsu	74.7°F	41mi
Maizuru	73.9°F	43mi
Kobe	75.1°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu