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 10.14°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.

50.3

°F

February 3, 09:46

Trend:

stable

Yesterday:

50.1°F

Tomorrow:

50.1°F

Sunrise:

06:55

Sunset:

17:27

Day Length:

10 h. 32 min.

Ōtsu in February

Minimum:

52.6°F

Average:

54.5°F

Maximum:

56.5°F

Sea water temperature in Ōtsu today

As of now, in Ōtsu, the water temperature is 50.3°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 1.1°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 closely matches the previous two weeks' average, indicating a stable 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 53.0°F on 2020, while the historical minimum was 47.6°F on 2025.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 50.1°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Jan 20	50.6°F	51.6°F	52.3°F
Jan 21	50.7°F	51.7°F	52.3°F
Jan 22	50.1°F	51.2°F	52.1°F
Jan 23	50.5°F	51.2°F	52.1°F
Jan 24	49.0°F	50.6°F	51.9°F
Jan 25	49.5°F	48.1°F	51.5°F
Jan 26	49.7°F	46.9°F	51.3°F
Jan 27	50.1°F	46.1°F	51.3°F
Jan 28	50.4°F	45.9°F	51.3°F
Jan 29	50.6°F	44.9°F	51.2°F
Jan 30	50.8°F	43.9°F	51.0°F
Jan 31	50.9°F	45.1°F	51.1°F
Feb 1	50.9°F	46.0°F	51.1°F
Feb 2	50.1°F	46.9°F	51.2°F
Feb 3	50.3°F	47.6°F	51.3°F
Feb 4	50.1°F	45.8°F	51.1°F
Feb 5	50.0°F	45.2°F	51.1°F
Feb 6	50.0°F	46.1°F	51.0°F
Feb 7	50.1°F	46.9°F	51.2°F
Feb 8	50.1°F	47.3°F	51.1°F
Feb 9	50.2°F	48.0°F	51.2°F
Feb 10	50.1°F	47.7°F	51.2°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	50.3°F	7mi
Osaka	48.3°F	30mi
Amagasaki	48.5°F	32mi
Nishinomiya-hama	48.5°F	36mi
Sakai	48.1°F	37mi
Tsu	46.3°F	41mi
Maizuru	53.2°F	43mi
Kobe	48.8°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu