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 30.08°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.

86.1

°F

August 30, 04:12

Trend:

decreasing

Yesterday:

86.4°F

Tomorrow:

85.7°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 86.1°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 5.0°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 closely matches the previous two weeks' average, indicating a stable trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 85.0°F on 2023, while the historical minimum was 75.3°F on 2015.

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 85.3°F, the minimum temperature may reach 84.9°F, and the maximum might stay at 85.7°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Aug 16	85.8°F	87.9°F	82.7°F
Aug 17	85.4°F	87.0°F	82.4°F
Aug 18	84.9°F	86.4°F	82.1°F
Aug 19	86.1°F	87.1°F	82.0°F
Aug 20	85.5°F	86.1°F	82.0°F
Aug 21	86.2°F	85.2°F	81.8°F
Aug 22	86.3°F	86.6°F	82.3°F
Aug 23	86.0°F	86.5°F	82.1°F
Aug 24	86.2°F	87.5°F	81.9°F
Aug 25	87.5°F	86.5°F	81.7°F
Aug 26	86.5°F	85.5°F	81.5°F
Aug 27	88.2°F	85.0°F	81.9°F
Aug 28	86.9°F	84.3°F	81.8°F
Aug 29	86.4°F	83.7°F	81.4°F
Aug 30	86.1°F	83.1°F	81.1°F
Aug 31	85.7°F	82.5°F	80.7°F
Sep 1	85.6°F	82.0°F	80.6°F
Sep 2	85.4°F	81.6°F	80.4°F
Sep 3	85.4°F	83.9°F	80.4°F
Sep 4	84.9°F	82.9°F	79.9°F
Sep 5	85.1°F	82.5°F	80.0°F
Sep 6	84.9°F	83.4°F	79.8°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 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	86.1°F	7mi
Osaka	85.2°F	30mi
Amagasaki	85.2°F	32mi
Nishinomiya-hama	85.0°F	36mi
Sakai	85.2°F	37mi
Tsu	84.6°F	41mi
Maizuru	85.5°F	43mi
Kobe	83.9°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu