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 28.74°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.

83.7

°F

August 30, 12:07

Trend:

decreasing

Yesterday:

83.9°F

Tomorrow:

83.3°F

Sunrise:

05:27

Sunset:

18:27

Day Length:

13 h. 0 min.

Ōtsu in September

Minimum:

51.6°F

Average:

53.7°F

Maximum:

55.5°F

Sea water temperature in Ōtsu today

As of now, in Ōtsu, the water temperature is 83.7°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 1.4°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 fall a bit.

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 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 87.2°F on 2025, while the historical minimum was 78.2°F on 2016.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 82.7°F, the minimum temperature may reach 82.2°F, and the maximum might stay at 83.3°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Aug 16	83.8°F	85.8°F	83.2°F
Aug 17	83.2°F	85.4°F	82.8°F
Aug 18	82.6°F	84.9°F	82.5°F
Aug 19	82.0°F	86.1°F	82.4°F
Aug 20	84.6°F	85.5°F	82.7°F
Aug 21	83.8°F	86.2°F	82.4°F
Aug 22	85.3°F	86.3°F	83.0°F
Aug 23	84.4°F	86.0°F	82.7°F
Aug 24	85.9°F	86.2°F	82.7°F
Aug 25	86.3°F	87.5°F	82.6°F
Aug 26	86.2°F	86.5°F	82.5°F
Aug 27	85.6°F	88.2°F	82.8°F
Aug 28	84.7°F	86.9°F	82.6°F
Aug 29	83.9°F	86.4°F	82.5°F
Aug 30	83.7°F	87.2°F	82.3°F
Aug 31	83.3°F	87.2°F	81.8°F
Sep 1	83.1°F	87.0°F	81.7°F
Sep 2	82.9°F	86.3°F	81.4°F
Sep 3	82.9°F	86.6°F	81.4°F
Sep 4	82.3°F	85.6°F	80.9°F
Sep 5	82.4°F	84.7°F	80.9°F
Sep 6	82.2°F	85.0°F	80.8°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, 77.6°F in Summer, and 71.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kyoto	83.7°F	7mi
Osaka	84.8°F	30mi
Amagasaki	84.8°F	32mi
Nishinomiya-hama	84.5°F	36mi
Sakai	84.9°F	37mi
Tsu	83.7°F	41mi
Maizuru	82.8°F	43mi
Kobe	83.6°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu