What is the current water temperature in Ōtsu?

As of now, in Ōtsu, the water temperature is 27.29°C. It's safe to say that the water is comfortably warm for various water-related activities.

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.

81.1

°F

July 21, 13:21

Trend:

increasing

Yesterday:

80.3°F

Tomorrow:

81.6°F

Sunrise:

04:57

Sunset:

19:08

Day Length:

14 h. 11 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 81.1°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.2°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 rise 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 also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 84.3°F on 2025, while the historical minimum was 75.1°F on 2020.

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 82.3°F, with minimum temperature starting at 81.6°F, while the maximum might reach 83.0°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Jul 7	73.2°F	83.1°F	76.3°F
Jul 8	73.3°F	85.5°F	77.0°F
Jul 9	75.1°F	85.6°F	77.1°F
Jul 10	77.5°F	85.0°F	77.3°F
Jul 11	77.9°F	86.3°F	78.0°F
Jul 12	77.8°F	84.8°F	78.1°F
Jul 13	76.2°F	86.1°F	78.3°F
Jul 14	80.0°F	84.4°F	78.5°F
Jul 15	81.7°F	86.3°F	78.9°F
Jul 16	81.6°F	85.3°F	79.0°F
Jul 17	82.8°F	84.3°F	78.9°F
Jul 18	80.9°F	84.4°F	78.9°F
Jul 19	80.2°F	83.4°F	79.0°F
Jul 20	80.3°F	82.5°F	79.1°F
Jul 21	81.1°F	84.3°F	79.9°F
Jul 22	81.6°F	85.7°F	80.4°F
Jul 23	81.7°F	87.0°F	80.5°F
Jul 24	81.9°F	85.7°F	80.7°F
Jul 25	82.3°F	85.1°F	81.2°F
Jul 26	82.5°F	86.2°F	81.4°F
Jul 27	82.8°F	87.4°F	81.6°F
Jul 28	83.0°F	87.0°F	81.8°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, 77.4°F in Summer, and 71.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kyoto	81.1°F	7mi
Osaka	83.6°F	30mi
Amagasaki	83.6°F	32mi
Nishinomiya-hama	83.5°F	36mi
Sakai	83.9°F	37mi
Tsu	81.0°F	41mi
Maizuru	84.1°F	43mi
Kobe	82.1°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu