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 30.55°C. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort.

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.

87.0

°F

August 5, 18:54

Trend:

stable

Yesterday:

88.0°F

Tomorrow:

87.0°F

Sunrise:

05:08

Sunset:

18:56

Day Length:

13 h. 48 min.

Ōtsu in August

Minimum:

52.1°F

Average:

53.9°F

Maximum:

55.3°F

Sea water temperature in Ōtsu today

As of now, in Ōtsu, the water temperature is 87.0°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 3.7°F higher 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 slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 87.3°F on 2024, while the historical minimum was 78.7°F on 2017.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 86.6°F, the minimum temperature may reach 86.0°F, and the maximum might stay at 87.0°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Jul 22	85.7°F	83.4°F	79.9°F
Jul 23	87.0°F	83.1°F	80.0°F
Jul 24	85.7°F	84.3°F	80.2°F
Jul 25	85.1°F	83.8°F	80.6°F
Jul 26	86.2°F	83.0°F	80.9°F
Jul 27	87.4°F	83.3°F	81.2°F
Jul 28	87.0°F	85.1°F	81.3°F
Jul 29	88.1°F	84.3°F	81.4°F
Jul 30	88.2°F	86.3°F	81.8°F
Jul 31	88.4°F	86.1°F	82.3°F
Aug 1	87.7°F	85.6°F	82.4°F
Aug 2	88.6°F	85.9°F	83.2°F
Aug 3	89.2°F	85.6°F	83.3°F
Aug 4	88.0°F	88.3°F	83.7°F
Aug 5	87.0°F	87.3°F	83.3°F
Aug 6	87.0°F	86.3°F	83.3°F
Aug 7	86.8°F	88.5°F	83.1°F
Aug 8	86.9°F	88.5°F	83.2°F
Aug 9	86.8°F	88.3°F	83.1°F
Aug 10	86.0°F	87.5°F	82.3°F
Aug 11	86.5°F	88.0°F	82.8°F
Aug 12	86.0°F	87.5°F	82.3°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 104 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 53.7°F in Winter, 57.0°F in Spring, 76.9°F in Summer, and 70.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kyoto	87.0°F	7mi
Osaka	86.0°F	30mi
Amagasaki	86.2°F	32mi
Nishinomiya-hama	85.6°F	36mi
Sakai	85.6°F	37mi
Tsu	86.8°F	41mi
Maizuru	85.2°F	43mi
Kobe	84.1°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu