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 9.35°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.

48.8

°F

February 17, 09:53

Trend:

stable

Yesterday:

49.0°F

Tomorrow:

48.9°F

Sunrise:

06:41

Sunset:

17:40

Day Length:

10 h. 59 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 48.8°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 1.8°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 stay about the same.

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 52.6°F on 2016, while the historical minimum was 46.7°F on 2025.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 48.7°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
Feb 3	50.3°F	47.6°F	51.2°F
Feb 4	49.1°F	45.8°F	50.9°F
Feb 5	48.4°F	45.2°F	50.8°F
Feb 6	48.9°F	46.1°F	50.8°F
Feb 7	49.2°F	46.9°F	51.0°F
Feb 8	49.5°F	47.3°F	51.0°F
Feb 9	49.7°F	48.0°F	51.1°F
Feb 10	49.7°F	47.7°F	51.0°F
Feb 11	49.9°F	48.2°F	50.9°F
Feb 12	50.0°F	48.1°F	50.9°F
Feb 13	48.5°F	48.5°F	50.6°F
Feb 14	48.5°F	48.5°F	50.8°F
Feb 15	48.7°F	48.8°F	50.6°F
Feb 16	49.0°F	49.1°F	50.9°F
Feb 17	48.8°F	46.7°F	50.7°F
Feb 18	48.9°F	47.2°F	50.8°F
Feb 19	48.9°F	47.8°F	50.7°F
Feb 20	48.5°F	48.2°F	50.3°F
Feb 21	48.7°F	48.6°F	50.5°F
Feb 22	48.6°F	48.0°F	50.5°F
Feb 23	48.8°F	48.3°F	50.6°F
Feb 24	48.5°F	48.1°F	50.3°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, 57.2°F in Spring, 77.4°F in Summer, and 71.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kyoto	48.8°F	7mi
Osaka	46.4°F	30mi
Amagasaki	45.8°F	32mi
Nishinomiya-hama	46.2°F	36mi
Sakai	47.1°F	37mi
Tsu	48.5°F	41mi
Maizuru	52.5°F	43mi
Kobe	47.2°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu