What is the current water temperature in Katsuura?

Q: What is the current water temperature in Katsuura?

As of now, in Katsuura, the water temperature is 16.16°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

Japan > Katsuura

Water temperature in Katsuura

Detailed information about the current water temperature in Katsuura. 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.

61.1

°F

February 13, 19:45

Trend:

stable

Yesterday:

61.4°F

Tomorrow:

61.3°F

Sunrise:

06:28

Sunset:

17:19

Day Length:

10 h. 51 min.

Katsuura in February

Minimum:

59.5°F

Average:

64.3°F

Maximum:

67.5°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 61.1°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. 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 rise 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 63.5°F on 2016, while the historical minimum was 59.1°F on 2025.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 60.9°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Katsuura

Date	Current Year actual* / forecast**	last year	10 years average
Jan 30	62.3°F	59.7°F	61.9°F
Jan 31	62.7°F	60.8°F	61.7°F
Feb 1	62.9°F	60.2°F	61.5°F
Feb 2	63.4°F	60.3°F	61.4°F
Feb 3	63.3°F	59.6°F	61.2°F
Feb 4	63.4°F	62.2°F	61.4°F
Feb 5	62.9°F	62.1°F	61.3°F
Feb 6	62.5°F	60.9°F	60.9°F
Feb 7	62.4°F	61.0°F	60.8°F
Feb 8	63.9°F	58.3°F	60.8°F
Feb 9	63.3°F	57.9°F	61.3°F
Feb 10	63.0°F	57.5°F	61.1°F
Feb 11	62.7°F	60.0°F	61.3°F
Feb 12	61.4°F	58.7°F	61.4°F
Feb 13	61.1°F	59.1°F	61.1°F
Feb 14	61.3°F	61.0°F	61.4°F
Feb 15	61.3°F	59.9°F	61.3°F
Feb 16	60.7°F	59.8°F	60.7°F
Feb 17	60.7°F	62.9°F	60.7°F
Feb 18	60.7°F	62.7°F	60.8°F
Feb 19	60.9°F	62.4°F	61.0°F
Feb 20	60.7°F	61.4°F	60.8°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 Katsuura by month

In Katsuura, the months July through October offer comfortable swimming conditions, which amounts to 118 swimming days.

The warmest water in Katsuura was recorded on September 16, 2024, reaching a 83.3°F. While the coldest temperature occurred on April 16, 2025, dipping to 56.7°F. The average readings by season are 63.3°F in Winter, 62.7°F in Spring, 74.9°F in Summer, and 75.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Isumi	60.1°F	8mi
Kisarazu	57.9°F	27mi
Ichihara	57.7°F	29mi
Kimitsu	58.5°F	29mi
Futtsu	58.9°F	30mi
Chiba	57.4°F	33mi
Yokosuka	59.7°F	38mi
Yokohama	57.3°F	42mi
Kawasaki	57.5°F	42mi
Honchō	55.2°F	43mi

* current water temperature in this city

** straight line distance from Katsuura