All data are in degrees Fahrenheit

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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.
Sea temperature in Ōtsu now

76.4

°F

September 19, 16:05

Trend:

decreasing

Yesterday:

76.8°F

Tomorrow:

75.9°F

Sunrise:

05:42

Sunset:

17:59

Day Length:

12 h. 17 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 76.4°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.8°F lower 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 considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 86.5°F on 2024, while the historical minimum was 75.1°F on 2017.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 74.8°F, the minimum temperature may reach 73.7°F, and the maximum might stay at 75.9°F.

Daily water temperature in Ōtsu

Date Current Year

actual* / forecast**

last year 10 years average
Sep 5 81.6°F 84.7°F 81.0°F
Sep 6 81.2°F 85.0°F 80.8°F
Sep 7 80.7°F 84.6°F 80.8°F
Sep 8 80.2°F 84.4°F 80.6°F
Sep 9 79.7°F 84.4°F 80.5°F
Sep 10 79.2°F 85.3°F 80.5°F
Sep 11 78.8°F 84.3°F 80.5°F
Sep 12 78.3°F 83.2°F 80.0°F
Sep 13 77.9°F 82.3°F 79.9°F
Sep 14 77.6°F 81.4°F 79.8°F
Sep 15 77.4°F 80.8°F 79.4°F
Sep 16 77.1°F 83.6°F 79.6°F
Sep 17 76.9°F 85.0°F 79.6°F
Sep 18 76.8°F 84.4°F 79.7°F
Sep 19 76.4°F 83.2°F 79.2°F
Sep 20 75.9°F 82.4°F 78.7°F
Sep 21 75.6°F 81.7°F 78.5°F
Sep 22 75.0°F 80.3°F 77.9°F
Sep 23 74.7°F 79.5°F 77.5°F
Sep 24 74.3°F 78.8°F 77.2°F
Sep 25 74.0°F 78.2°F 76.9°F
Sep 26 73.7°F 77.6°F 76.5°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 76.4°F 7mi
Osaka 79.9°F 30mi
Amagasaki 79.8°F 32mi
Nishinomiya-hama 79.7°F 36mi
Sakai 80.0°F 37mi
Tsu 78.8°F 41mi
Maizuru 79.6°F 43mi
Kobe 79.5°F 44mi

* current water temperature in this city

** straight line distance from Ōtsu