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 11.66°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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.

53.0

°F

January 13, 09:11

Trend:

decreasing

Yesterday:

53.1°F

Tomorrow:

52.8°F

Sunrise:

07:05

Sunset:

17:06

Day Length:

10 h. 1 min.

Ōtsu in January

Minimum:

52.5°F

Average:

54.6°F

Maximum:

56.8°F

Sea water temperature in Ōtsu today

As of now, in Ōtsu, the water temperature is 53.0°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is about the same as 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 54.9°F on 2019, while the historical minimum was 50.6°F on 2023.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 52.6°F, the minimum temperature may reach 52.3°F, and the maximum might stay at 52.8°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Jan 1	54.4°F	53.5°F	54.6°F
Jan 2	54.4°F	53.6°F	54.5°F
Jan 3	54.5°F	53.7°F	54.5°F
Jan 4	54.2°F	53.5°F	54.4°F
Jan 5	54.3°F	53.4°F	54.4°F
Jan 6	54.2°F	53.3°F	54.4°F
Jan 7	53.5°F	52.6°F	54.0°F
Jan 8	53.3°F	52.5°F	53.9°F
Jan 9	53.3°F	52.5°F	53.7°F
Jan 10	53.0°F	51.9°F	53.5°F
Jan 11	53.0°F	51.9°F	53.5°F
Jan 12	53.1°F	51.9°F	53.3°F
Jan 13	53.0°F	51.9°F	53.1°F
Jan 14	52.8°F	51.0°F	53.0°F
Jan 15	52.7°F	51.0°F	52.9°F
Jan 16	52.6°F	51.1°F	52.8°F
Jan 17	52.7°F	51.3°F	52.8°F
Jan 18	52.5°F	51.5°F	52.6°F
Jan 19	52.6°F	51.6°F	52.7°F
Jan 20	52.3°F	51.6°F	52.5°F
Dec 30	54.1°F	53.9°F	54.5°F
Dec 31	54.3°F	53.4°F	54.5°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 53.7°F in Winter, 57.2°F in Spring, 77.4°F in Summer, and 71.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kyoto	53.0°F	7mi
Osaka	53.5°F	30mi
Amagasaki	53.4°F	32mi
Nishinomiya-hama	53.1°F	36mi
Sakai	53.6°F	37mi
Tsu	49.4°F	41mi
Maizuru	57.2°F	43mi
Kobe	53.2°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu