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 10.03°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.

50.1

°F

March 21, 01:12

Trend:

increasing

Yesterday:

50.0°F

Tomorrow:

50.2°F

Sunrise:

06:00

Sunset:

18:08

Day Length:

12 h. 8 min.

Ōtsu in March

Minimum:

52.5°F

Average:

54.5°F

Maximum:

55.9°F

Sea water temperature in Ōtsu today

As of now, in Ōtsu, the water temperature is 50.1°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 1.0°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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming 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 53.4°F on 2023, while the historical minimum was 47.3°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. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 50.9°F, with minimum temperature starting at 50.2°F, while the maximum might reach 51.9°F.

Daily water temperature in Ōtsu

Date	Current Year actual* / forecast**	last year	10 years average
Mar 7	49.0°F	48.4°F	49.8°F
Mar 8	49.4°F	48.7°F	50.2°F
Mar 9	48.7°F	45.5°F	49.3°F
Mar 10	48.7°F	46.1°F	49.7°F
Mar 11	48.8°F	46.7°F	49.5°F
Mar 12	48.3°F	47.3°F	49.8°F
Mar 13	48.4°F	48.6°F	49.9°F
Mar 14	48.7°F	47.9°F	49.7°F
Mar 15	48.1°F	48.4°F	50.0°F
Mar 16	48.6°F	48.9°F	50.4°F
Mar 17	49.4°F	49.2°F	50.8°F
Mar 18	49.6°F	48.0°F	50.8°F
Mar 19	49.9°F	47.5°F	50.6°F
Mar 20	50.0°F	48.0°F	51.0°F
Mar 21	50.1°F	47.3°F	51.1°F
Mar 22	50.2°F	48.6°F	51.2°F
Mar 23	50.5°F	49.7°F	51.5°F
Mar 24	50.4°F	49.1°F	51.5°F
Mar 25	50.6°F	50.5°F	51.7°F
Mar 26	51.1°F	50.6°F	52.1°F
Mar 27	51.4°F	52.7°F	52.4°F
Mar 28	51.9°F	52.8°F	52.9°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	50.1°F	7mi
Osaka	49.3°F	30mi
Amagasaki	49.2°F	32mi
Nishinomiya-hama	50.2°F	36mi
Sakai	49.9°F	37mi
Tsu	51.3°F	41mi
Maizuru	51.6°F	43mi
Kobe	51.7°F	44mi

* current water temperature in this city

** straight line distance from Ōtsu