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 14.3°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 > 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.

57.7

°F

March 10, 01:34

Trend:

stable

Yesterday:

58.1°F

Tomorrow:

58.0°F

Sunrise:

05:58

Sunset:

17:41

Day Length:

11 h. 43 min.

Katsuura in March

Minimum:

59.2°F

Average:

63.7°F

Maximum:

67.6°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 57.7°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 3.1°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 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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 64.7°F on 2024, while the historical minimum was 57.9°F on 2020.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 57.3°F, the minimum temperature may reach 56.9°F, and the maximum might stay at 58.0°F.

Daily water temperature in Katsuura

Date	Current Year actual* / forecast**	last year	10 years average
Feb 24	58.6°F	61.7°F	60.9°F
Feb 25	58.7°F	61.1°F	60.6°F
Feb 26	58.8°F	59.3°F	60.5°F
Feb 27	58.1°F	60.3°F	60.2°F
Feb 28	58.4°F	59.5°F	60.3°F
Mar 1	59.4°F	59.5°F	60.4°F
Mar 2	59.4°F	59.6°F	60.5°F
Mar 3	59.9°F	58.7°F	60.5°F
Mar 4	60.7°F	59.1°F	60.6°F
Mar 5	59.2°F	59.5°F	60.4°F
Mar 6	59.1°F	59.7°F	60.2°F
Mar 7	59.8°F	62.5°F	60.7°F
Mar 8	58.4°F	61.4°F	60.6°F
Mar 9	58.1°F	62.0°F	61.2°F
Mar 10	57.7°F	61.4°F	60.8°F
Mar 11	58.0°F	61.1°F	61.1°F
Mar 12	57.6°F	60.5°F	60.6°F
Mar 13	57.4°F	60.7°F	60.4°F
Mar 14	57.0°F	60.9°F	60.1°F
Mar 15	56.9°F	60.4°F	60.0°F
Mar 16	56.9°F	60.6°F	60.0°F
Mar 17	57.2°F	60.7°F	60.2°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 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	57.3°F	8mi
Kisarazu	56.2°F	27mi
Ichihara	55.4°F	29mi
Kimitsu	55.4°F	29mi
Futtsu	56.3°F	30mi
Chiba	55.1°F	33mi
Yokosuka	54.9°F	38mi
Yokohama	52.9°F	42mi
Kawasaki	52.8°F	42mi
Honchō	53.8°F	43mi

* current water temperature in this city

** straight line distance from Katsuura